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UBC Theses and Dissertations

The hydromedusae of the west coast of North America with special reference ot those of the Vancouver.. Foerster, R. Earle 1922-12-31

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J p j£r/-/^ JFb*r£7e  U-£ 3 -3 7  /?±JL -A *  THE HXDR01vl.EDUSAE OP THE WEST OOAST OF HORTH AMERICA with special  reference  to those  of  THE VANCOUVER ISLAHD REGIOH.  by  R. Earle Foerster.  A Thesis submitted for the Degree of MASTER  OF  ARTS  in the Department Of ZOOLOGY.  The University of British Columbia APRIL, 1922.  - 1 -  The Hydromedusae of the West Coast of North America with special reference to those of Vancouver Island Region, By R. Sarle Foerster.  INTRODUCTION. References to the Medusae of the 3. C. Coast, as far as collecting and classification are concerned are very meagre when compared to the whole mass of Medusan literature, especially so when one realizes the richness of the marine fauna in this region, in numbers as well as variety* The first mention of Medusae from the B. C. Coast (then the NorthWest Territories), is found in L. Agassiz' Contributions to the Natural History of the United States, vol. 4, 1862, based on a collection made by his son, Alexander.Agassiz, in the Strait Of Georgia and the Straits of Puca.  Three years later, 1865,  A. Agassiz, in his North American Acalephs vol. 2, published complete descriptions and figures of the species included in his collection, 14 species in all. In 1900, a collection of medusae was made by Cresswell Shearer, in company with Prof. MacBride of Montreal, chiefly in the vicinity of Victoria Harbour and the adjoining waters of Puget Sound. Siphonophora.  The collection oomprised 13 Hydromedusae and 1 Of the Hydromeduffae, 5 species were new to Science.  The results of the examination of the collection were published by Louis Murbach and Cresswell Shearer, first, in the Annals and  - 129 -  P l a t e IV.  F i g . 1. ProDQpoidaotyla poiynema. Enlarged drawing of 9 quadrant to sho>7 the d i r e c t i o n of the branches of tne r a d i a l c a n a l s and the s t r u c t u r e or t h s t e n t a c l e s . F i g . 2 . StaurQf hora g u r o u r a a . Aboral rlew shoving the shape of the mouth and connection to the radial  canals.  P i g . 3 . Free-hand s k e t c h of e n t i r e specimen. F i g . 4. P o t i o n of b e l l margin showing two t e n t a s l o knoba and t h r e e l i t h o c y e t s . F i g . 5 . P o r t i o u of b e l l margin showing t i e shape of the t e n t a c l e k n o b s . Pig. 6.  Hitroooma alnuosa>  Fig, 7. J l a r o p s l d i u m kjiljifljl,  Free-hand drawing. ° r a l Tiew thowing the  t e n t a j u l a r p r o c e s s e s of the r a d i a l o a n a l .  - 2 Magazine of Natural History, sories 7, vol. IX, 1902, and then in the Proceedings of the Zoologioal Society of London, vol. II, pp. 164 - 191, 1903, And, lastly, in 1916, a description of a new genus, Halimedusa tyx>usr collected by Dr. J. Playfair McHurrich at Amphrodite Point, West Coast of Vancouver Island was given by Dr« H, B. Bigelow. The collection, on wlxioh this paper is based, is in the Museum of the Dominion Biological Station, Nanaimo, B, C., and was kindly handed over for examination by Dr. 0. IfoLean Fraser, Direotor Of the Station. of 9 years, from 1912 - 1921, formalin.  It extends over a period  All the forms are preserved in  In addition, the author oollected a number of species  during the summer of 1921 and examined them alive.  In such  cases, oolour notes and other changeable charaoters are inoluded in the descriptions. In all, the collection numbers 34 speoies.  This does  net pretend to be the complete list of all medusae found in the Vanoouver Island Region but is merely a list of those Hydromedusae which have been colleoted so far in this Region.  The speoies are:-  AnthomedusaeSarsia flammea Hartlaub.  Heoturris pileata (Forskal)  Sarsia mirabilis L, Agassiz.  Bougainvillia multitentaculata, sp. nov. Bougainvillia nordgaardii (Browne ). Bougainvillia superciliaris (Gould). Rathke blumenbachii (Rathke).  Sarsia prinoeps Haeckel. Stomotoca atra Agassiz. Halitholus pauper Hartlaub, Leuokartiara ootona (Fleming). Leuokartiara breviconis (Muebaoh and Shearer)  Probosoidactyla flavicirrata Brandt. Probosoidactyla polynema (Hartlaub).  - 130 -  Plate V.  Fig. 1.  Halistaura eellularia.  Camera luolda drawing  of a sense pit. A...Bxumbrellar aurfaoe of velum. B...Columnar cells of exumbrellar ectoderm. C...Cells of subumbrellar layer, D....Columnar oells of exumbrellar ectoderm bordering marginal ring, 3...Exumbrellar cells boraering marginal ring. Pig, 2,  Camera luoida drawing showing the relative position of sense pits and tentacles, Ve,..,velum,  Marg,,,.marginal ring,  S,P,,.sense pit, 'fent... tentacles.  - 3 Lauokartiara nobilis Hartlaub. Catablema resicarium (agassizJ. Nsoturria pelagioa (Agassiz and Mayer). LGptomedusae;Melicertum campanula Oken.  Mitrocoma disco ida Torrey.  Polyorchis penicillata Agassiz.  Mitrocoma sinuosa sp. nov.  Obelia loncissima Hinoks.  Halistaura oellularia (Agassiz).  Obolia species(?)  Staurophora porpurea sp.nov.  Tiaropsidium kelseyi Torrey.  Eutonina indicans (Romanes).  Clytia edwardsii (Nutting). Aecuorea aequorea (Forskalj. Phial idium languidum rar. gregarium (Agassiz). Trachomedusae;Gonionemus vertens Agassiz.  Eperetmus typus Bigelow.  Aglantha digitale (Muller). Narcomedusae:Aegina rosea Esohsoholtz.  Of these species, 3, aa noted, are new to.Scienoe, iAnthomedusae;Eougainvillia multitentaculata. Leptomedusae:Mitroooma sinuosa.  Staurophora purpurea.  8 species are new to the Soast, as follows:Anthomedusae;Bougaintrillia nordgaardii (Browne) H a l i t h o l u s pauper H a r t l a u b .  L e u c k a r t i a r a ocytxna ( F l e m i n g ) .  P r o b o s c i d a o t y l a polynema (Hartlaub ).  S a r s i a flammea H a r t l a u b .  Neoturris p l l e a t a  (Forskal).  4 Leptomedusae;Obelia, species {?). Practically all of these species have been collected from the Bast Coast of Vancouver Island and the majority from within a radius of ten miles of the Biological Station, a fact which emphasizes the richness of the Region in marine fauna, for what applies to Medusae applies equally well to the majority of marine forms. The description of these species does not pretend to he a complete one hut rather a comparison with the original descriptions, which comparison if not definitely mentioned is inferred.  Where possible, the descriptions as given by Dr. A, G.  Mayer (Medusae of the World, vols, 1 and 2, 1910), have been used in the comparison,  A complete synonymy and distribution list  with reference to the West Ooast are also given. As the title indicates, this paper purposes to include all species Of Hydromedusao, found on the West Coast of North America, between the Gulf of Panama and the Bering Sea,  Of those  species, not found in the Vancouver Island Region, however, the complete synonymy and distribution with reference to the West Ooast alone are given, the idea in mind being to bring all the Medusae of the West Coast together, to give the complete synonymy having reference to the West Ooast as well as the distribution on the Coast and to eliminate as far as possible any repetition of description, etc*  It is hoped that this will be of service to  students of Medusae, not as a monograph but as a handbook or book Of reference regarding the West Coast Hydromedusae.  - 5 The literature on the Medusae of the West Coast, exclusive of Vancouver Island is more extensive. The first-recorded collection is that of Mertens in Bering Sea and the Northwest Pacific, published in 1834 by Brandt.  Next, in order of time, is the report of L. Agassiz  in 1862, based on the collection made by his son, A. Agassiz, and later published by the latter (1865), with descriptions and figures.  The collecting was done between the Gulf of Georgia  and San Francisco.  In 1889, W. J. Fewkes published a report  on "The New Invertebrata from the Coast of California", oolleoted in 1887, which deals chiefly with Medusae. •Soto I ' In 1897, 0. Maas gave his report on the Medusae oolleoted by the "Albatross" during an exploration off the West Coasts of Mexico, Central and South America, and off the Galapagos Islands, during 1891. In 1902, A, Agassiz and A, G. Mayer published the results of their examination of the Medusae oolleoted by the "Albatross" in the tropical Pacific from August 1899 to March 1900, Then there is a lapse of 7 years until 1909 when two publisations were issued, one a Memoir on the Medusae oolleoted by the "Albatross" from October, 1904 to March, 1905, in the tropical Pacific and examined by H. 3. 3igelow, the other a Bulletin by E. B. Torrey on "The Leptomedusae of the San Diego Region". In 1913, Dr. H. B. Bigelow published his report on "The Medusae and Siphonophorae collected by the U, S, Fisheries Steamer "Albatross" in the northwestern Pacific, 1906", and again in 1920 reported on the Medusae and Ctenophora collected by the Southern  - 6 Party of the Canadian Arotio Expedition, 1913 - 1916, chiefly in the Arctic Ooean but with a few references to the West Goast of Alaska, In all, then, tan reports have been made on the Medusae of the V/est Ooast of North America, a number which signifies that only a beginning has been made in the systematic study of these forms, The drawings included in the plates are all taken from preserved specimens.  Owing to the large size of many of the  specimens, it was Impossible to make camera luoida drawings of all so that some are drawn with the camera lucida while others are free hand.  The latter are not intended to be perfectly exact repres-  entations but may, nevertheless, be of some service in exemplifying the characters in mind and in further classification. The work embodied in this research, was carried on during the months of June, July and August, 19 21, at the Dominion Biological Station, Nanaimo, B, C,, through the kindness of the Director, Dr. C. M. Fraser, and completed at the Zoological Laboratories of the University of British Columbia during the tenure of a Bursary from the Honorary Advisory Council for Scientific and Industrial Research. I wish to express my indebtedness to Dr. 0. McLean Fraser, Professor of Zoology, University of B, 0., for his suggestion of this subject for research and also for his advice and encouragement during the carrying on of the work.  - 7 SYSTEMATIC DIS0U38IOH. la the preliminary olassifioation of the specimens in the oolleotion, the olassif ioat ion adopted by Mayer in his Medusae of the '.Vorld, 1910, was used.  Although it proved most efficient,  in identifying the various specimens, it was found, however, that the system of nomenclature it involved was not used by modern investigators.  There ore, in the final analysis, Mayer's system  has been altered considerably to conform with the more modern authors, suoh as  viewa of the  Browne, Bigelow, Hartlaub and others.  It was at first thought advisable to refer to all departures from the classification of Mayer, but it has since been considered as beyond the scope of this paper.  Such changes as do  occur in nomenclature or olassifioation will be at onco evident to those examining this report, and sinco full explanations of these have been given by the above-mentioned investigators, nothing would be gained by their repetition here. The chief difference between the systems lies in the complete abandonment of all sub-familie3,  These have been either  elevated to separate families or incorporated in the family without further division. In some oases, confusion exists as to the correct nomenclature or generic distinctions. are given.  In such cases, brief discussions  It was considered more advisable to include these dis-  oussions under the heading "Systematic Discussion" rather than to separate them into their several family discussions.  Therefore  all family and generic discussion is eliminated from the text. ?ami1y P ande idae. .Regarding this family, there has been considerable die-  - 8 cussion.  Since "Tiara" has been found to be -preoccupied for a  mollusc, two names have been given to the family called by Haeckel "Tiaridae". Bigelow, 1913, has elevated the sub-family name Pandeidao. Haeckel, to that of the family name. Hartlaub, 1913, on the other hand, states "Bigelow, 1913, will den Familiennamen "Tiaridae" durch "Pandeidae" ersetzt haben, weil der Gattungsname "Tiara" nicht mehr haltbar sei.  Iah  kann die dringende ifotwendigkeit solcher Andarung nicht anerkennen und finde, dasz sich aus manclierlei Grunden die Konservierung des durch Haeckels grosze Monographic eingeburgerten Names mehr empfiehlt".  He would use the new term "Seoturridan".  It would  seem to be more correct and more -justifiable and tend to cause less confusion, to elevate the sub-family name, adopted by Haeckel, rather than to introduce a new term.  Therefore Bigelow's nomen-  clature has here been adopted. Again, Hartlaub includes under the family Heoturriden such genera as Amphinema and 3tornot;oca whioh Bigelow prefers, and rightly so, to separate into families.  The latter however,  accepts Hartlaub's division of the old Tiara or Turris group into the genera Halitholus, Leuckartjara, Oatablema and Heoturrls, which may be in Hartlaub, 1913, pages 242 - 245.  A similar  division has been made in this report. ffaroily williadae. Mayer has united the tribes Williadae, including the genera Proboscidaotyla Brandt and Willsia Forbes, and Bythotiaridaa, including the genera Bythotiara Gunther, Siboglta Maas and Hlpbe Mayer, under the sub-family Dendrostaurinae, but Bigelow and  - 9 Hartlaub choose to keep them separate, the former as the family Williadae and the latter as the family Bythotiaridae. Regarding' the Leptomednsae, there seems to "be some confusion as to the generic name Butonina Hartlaub. Bigelow, 1913, in his generic discussion of iiatonin,a states "Mayer uses the name Butimium Haeckel for this group (he, however, does not include the number of tentacles as a generic character), bat the type species of that genus, S. eleohas, Haeckel, was beyond question a Jgutima.  I formerly  used the name Eutimalphea: but Butonina seems to have the better claim, because its type species is well known, while that of -Sutimalphes, B. pretiosa Haeckel, was founded for a fragmentary specimen which may have been  a Sim,a.  It has never  been seen, since first recorded", Haeckel, 1879, restricts But Imium to include those forms possessing 4 tentacles, so that whether 5. elephas Haeckel, be a autima or not, Eu,tonina indicans (Mayer's Butimium socialis) o^n in no case belong to the genus Butimium as it possesses numerous tentacles. Regarding Butlmalphe a Haeckel, there seems to be no foundation for Bigelow's statement that E. pretiosa Haeokel was based on a fragmentary specimen, as both Haecfcel's description and figure denote a fully developed and complete individual. Haeckel describes JButimalphes as possessing numerous tentacles and several marginal cirri.  Therefore, as Eutonina indicans  possesses no marginal ciiri, it cannot belong to the genus Butimalphes. Hartlaub has suggested the name Butonina for these  - 10 forms.  Bigelow however, departs from Hartlaub's generic des-  cription by enlarging the genus to include forms "seldom with marginal cirri or warts".  This implies the probable presence  of marginal cirri and in such a case is synonymous with Batimalphes. Therefore the classification may be left as laid down by Haeckel with the addition of the new genus Eutonina as follows:Butonina Hartlaub. Sucopide with 8 adradial otocysts and very numerous tentacles; without marginal cirri, etc. Su,tonina indicans (Romanes). Regarding the Traohornsdnsae, mention should be made of the difference of opinion existing as to the classification of such forms as Gonionemus and Gossea, etc. Mayer, 1910 and Gott, 1903, have used as distinguishing charaetero, the presence or absence of tentaoular suckers.  Browne,  1904, and Bigelow, 1909 and 1913, have used the structure of the otooyst.  An excellent explanation is given by Bigelow, 1913,  The  latter's system has here been adopted. In conclusion, it must be made clear that in no case does the author pretend to give a oompleta synonymy of the various species.  Those may be found in Mayer, 1910. As far as possible,  the original binomial designation has been given with its reference and, as well, all references made by authors to the Medusae of the Pacific Ooast of Horth America.  11G30GBAPHIQ DISTRIBUTION.  In examining the distribution of the Hydrosiedusa.e of The West Coast of America, two tables have been prepared.  One  deals with the general distribution of each species, and gives the number of species for the various areas; the other gives the comparative distribution according to regions. AS mentioned in the Introduction, the specimens referred to especially in this paper, have been collected chiefly in the Vancouver Island Region and almost wholly on the Sast Ooast of the Island.  Of the 34 species contained in the collec-  tion, 24 were found only on the East Coast of Vancouver Island while, of the remaining 10 species, S were common to the Vancouver Island Region and the Region of the B. G. Coast, North of Vancouver Island, extending to the Gulf of Alaska.  These species  arejAe-auorea aequorea, ^utonina indioans, Leuokartlara breviconis, Melicertum campanula, Polyorchis uonicillata, Sarsia flammea, Sarsia mlrabilis, StOiaotoca atra.  Only 2 species were collected  which were restricted to the Northern Region, these being Boupainvillia multitentaoulata (new species), and Leuckartiara nobilis.  It is quite probable that other forms are common to the  two above-mentioned regions which are abundant in the Vancouver Island Region, such as PrnbOBp.1 rlftntyl • tXJOlAlXXMiAt languidum var. gregariua, and Arelantha digitals.  IMaLUJLM  Very little  collecting has been carried out North of Vancouver Island along the B. C. Ooast, which would explain the pauolty of species reported  - 12 from this area.  Those collections which were made in this district,  Banks Island and Loredo Channel, (by Dr. 0.McLean Fraser while engaged in Sea Lion work, etc.), in which the opportunity of securing specimens afforded itself only in the evening or early morning while the boat was anchored overnight, clearly showed that the specimens were plentiful and varied and would bear investigation. Moreover, the specimens from the Northern Region were much larger in size than those found further South, e.g., Stomotoca atra. Turning to the South, of the 34 species in the collection, only 6 are common to the Vancouver Island Region and the region of the San Juan Archipelago.  These are Aeouorea aeouorea,  Gonionemus vertens, Halistaura .pellularla, Phi^Lidium languidura var. gregarium, Polyorchis penioillata and Stomotoca atra.  Aeouor-  ea aequoreaf Polyorchis penioillata and Stomotoca atra are thus found to be common to all three regions mentioned above and in faot, are found as far South as the San Francisco to Panama Region. One specimen in the collection, Polyorchis penioillata has been found also on the West Coast of Vancouver Island at Sea Otter Gove la the North and at Grant's Landing in the South.  Two  other species, not in the collection, but included in the text are found on the West Ooast.  Halimedusa typus, an Anthomedusa, has  been found only at Anphrodite Point, while one Leptomedusa,^ Obalia borealis, has been reported from Uoluelet as well as from the B. C. Ooast North of Vancouver Island and the San Juan Archipelago. Of new species, i.e., new to Science, there are three, one Anthomedusa, Bougainvillia multitentaculata, and two Lex>tomedusae, Mit.rocoma slnuosa and Staurophora purpurea. ing the first-naaed of these, Bigelow has said of the genus  Regard-  - 13 "Considering how wide an area is covered by these few records, and how many species and races of Bougainvillia are known from both sides of the North Atlantic, probably the present reoord of B, britannica is but a forerunner of others to come from the Pacific".  (Bigelow, 1920).  Thus another species of this la/ge  genus has been found, making the number of species reported from the North Pacific four,  Bpu^ainv ill la mult itentaculata was  found In the Region of 3. G. North of Yancouver Island, whereas the other two were found in the Vancouver Island Region. There are 8 species, new to the Goast, 7 -anthonedusae and 1 Leptomedusa.  Of the ^nthoraedusae, Bougainvillia nord-  eaardii has been found in the South Pacific and North Atlantic; Halitholus pauper and Proboao idao tyla polyneiaa have been reported from the North Atlantic only;  Leuckartiara nobilis has been pre-  viously reported from the North Atlantio and 'ohe Mediterranean} Leuckartiara ootona is common to the South Pacific, 3ast Ooast of North America, North Atlantic, South Atlantic, and Mediterranean and also to the Western Pacific;  Neoturris pileata is  common to the North Atlantic, Mediterranean and Western Pacific, while garsia flammea has been recorded from the North Atlantic and Arcoic Oceans.  The Lept omedusa,, Obelia speoies(?) f has not  been determined. There are 19 species new t? the Yancouver Island Region. These include the 3 new species as well as the following:Bougainvillia nordgaardii f Boupcaiav illia superciliaris, Oatablema vesioarium, Eperetmus typus, Butonina indicans, Halitholus pauper. Leuckartiara octona, Leuckartiara breviconi^, Mltrocoma discoida. Neoturris pslagioa, Neoturris pileata.  * 14 « Obalia Bnantfis, Probosoidaotyla polraema, Sarsia flammea, Sarsia p.rincepsf and Tiaropsidiura kelseyi.  Of these, several  have been referred to in the previous paragraph. remainder:-  Regarding the  Catablema vesicariuia has been reported irom Bering  Sea dna Alaska as well as from the East Coast ofHorth America and the Horth Atlantic.  Epe re terns typus has ~been previously  known from Alaska and the Arctic Ocean.  Sutonina indicans has  been found in Alaskan waters and in the North Atlantic. Leftokartiara brevioonis  has been reported from Bering Sea,  Horth Atlantic and Arctic Oceans; Mitrocoma dis.oolda is reported from San Diego; Hecturris uelagioa from the San Francisco to Panama Region;  Sarsia priaoeps from Bering Sea, East Ooast of  Horth America, Horth Atlantic and Arctic Oceans and T iaro'osidium leal seyi from San Diego. Of the Anthomedusae, 51 species have been found along the whole Ooast. Island Region.  Of these, 18 species are found in the Vancouver  Of these 18 species, 10 are common to the Region  Horth of Vancouver Island and the Vancouver Island Region while 8 are found in the Vancouver Island Region and not Horth of it. 5 species are common to the Vancouver Island Region and the Region South of it, while 13 species are found in the Vancouver Island Region and not South of it.  Of those in the Vancouver  Island Region, as mentioned above, 3 are found on the West Coast of the Island, two of them, Polyorchis penicillata and Ooelia boreal is common to the Region South of Vancouver Island, whereas the third, Halimedusa tyous is reported only from the West Coast. From this comparison, it can be seen that, among the Anthomedusae. the greater number art common to the Vancouver  - 15 Island Region and North of it rather than to the Vancouver Island Region and South of it, the proportion being 2: 1. Regarding the Leptomedusaef there are 58 species reported from the whole Coast and 23 from the Vancouver Island Region.  Here the reverse condition is found as com-  pared with the Anthomedusae, there being 12 species common to the Vancouver Island Region and North of it, II found in the Vancouver Island Region and not North of it, 16 species oommon to the Vancouver Island Region and South of it and. 7 found in the Vancouver Island Region and not South of it, the proportion in this case being 16:  12 in favour of those  common to the Vancouver Region and South of it. For the •Trachomedusae, of which there are 21 species reported from the entire Coast, 4 species are found in the Vancouver Island Region,  There are 2 species common to the  Vancouver Island Region and North of it and 2 species found in the Vancouver Island Region and not North of itj there is one species oommon to the Vancouver Island Region and South of it and 3 species found in the Vancouver Island Region and not South of It.  In this case, the proportion is, as in the  Anthomedusae, greater for those species common to the Vanccaver Island Region and North of it in contrast with those common to the Vancouver Island Region and South of it, the proportion being as before, 2 s 1. There is only one Narcomedusat A, a gin a rosea, found in The Vancouver Island Region out of 11 found on the entire Coast, It is common to the Vancouver Island Region and North of it only,  - 16 Regarding the species from the whole Coast, it is seen that 101 species have been reported from South of the Vancouver Island Region, 54 from North of Vancouver Island Region, and 46 from the Vancouver Island Region.  This does not suggest  that the species are any more numerous to the South than to the North but merely goes to show that more work has been done on Medusae to the South and that more is required on those to th© North.  This is further brought out by the fact that, of  the 101 species South of Vancouver Island Region, 50 are restricted to this Division, whereas of the 54 from North of the Vancouver Island Region, only 5 are restricted to the Northern Dividion.  Of the 46 species from the Vancouver Island Region,  only 5 species are restricted to the Region. It is interesting to note that of the species common to the West Coast and the South Pacific, 15 of these species are common to the Southern Division which is not uncommon, whereas 10 species are common to the South Pacific and the northern Division.  In the northern Division, however, most  Of the forms are found on the surface, while in the Southern waters, they are secured in depth hauls. There are 35 species common to the North Atlantic and the w'est Coast; 32 common to the 'western Pacific and the '.Vest CoaBt, and 31 common to the East and West Coasts of America, It is important to note that, whereas some forms, such as Af-lantha dU-itale, Bougainvill is suparciliar is, Oatablema vesicarlum, Louokartiara ootona, ilelioertum oamp&nula, Pandea rubra, Pantaoho,f:on haeoklii and Rathke blumenbaohij., are  - XT found common to the Arotio Ooean, Horth Atlantic, lor them Dirision of the West Ooast and Southern DiTision, lorth  of  San Pranelsoo, or other temperate waters, other forms, suoh as Aaglna. ramma.T Aaonaraa. annuor«a. Hal lamas paplllaanmr Sarsla **lmlaf eto., are reported from oool, temperate sone waters, suoh as Bering Sea, Horth Atlantic, northern Dirision of the West Ooast, as well as from tropical or warm temperate sone waters, the South Pacific, San Francisco to Panama, South Atlantio, Philippines, eto.  Therefore, one cannot tell  by the reported looation of a speoies in the YanoouTer Island Region, whether it is strictly a northern or Southern speoies or a looal form, there are 20 speoies common to the West Ooast and the Arot ic Ocean, 8 Ant home dun an. 6 Iye:?fcoifl&aa,SftQ, 4 2Xfifl&~ omeduaaa and 2 ITaroomadusae.  Of the Anthomedusae, 4 speoies  belong to the genus  7 of the 8 speoies are found  Sarsia.  in the YanoouTer Island Region and Horth of it, while tho eighth, aarsia exlrnla, is found both to the South and Horth of It hut not in it.  Sarsia mlrabllis is oommon to both the  Horthern and Southern DiTlsions as well as to the YanoouTer iBland Region,  Regarding the ^aptomoduaaa, 4 of the 6 speoies  are oommon to the Horthern DiTision and the Arctic while of the remaining 2, Qbelja liflhjLkflm* and Obalia geniculate, the former is common to both the Horthern and Southern Divisions, the latter only to the 3outhern DiTision,  Of the 4 Traoho-  MftHlftit 3 speoies, .. •JL.-.n.tfraflirUftlQ,Sneratmus typm. and Ptychoi-astria poIaris, are found in the Horthern DiTision, the first two named being oommon also to the YanoeuTer Island  - 13 Segion,  The fourth species, Halicreas papillosum, is found  both in Bering Sea and in the Eogion extending from San Francisco to Panama.  The 2 Nareonedusae, Aeginonsis laurentii,  and Aercinura grimaldil, are found only in the Northern Division of the West Coast, but the latter has been reported from the South Pacific and the Philippines* It might be well to explain here, some of the regions n-amed in the General Distribution Table,  Alaska refers primari-  ly to the Gulf of Alaska but it also includes the West Coast of the Peninsula,  The B, C, Coast, North of Vancouver Island, is  that region lying between Vancouver Island on the south and the Gulf of Alaska on the north.  The Vancouver Island Begion in-  cludes both the East and West Coasts.  The South Atlantic and  Mediterrnaean Sea regions are taken in conjunction.  The West-  ern Pacific embraces that region extending from Karatchatka on the north to the Philippines on the South.  Owing to the com-  paratively few species found in this region and to the fact that many of them are found both in the North and South, it was not thought advisable to divide this large area into Northern and Southern Divisions.  * If Geographical Distribution of the Hydromedusae found off the V/est Coast of North Amerioa. A •*» u •  n  •a  A  • m II A •H  u  © PQ  Aegina  eitrea  Aegina  rosea  Aegina  species?  Aeginopsis laurentii Aeginura g r i m a l d i i Aequorea  O-l  M  o3 t-i ta la Ft 05 •rt +> Pi 0) r-i  •  g m cS r-i  <  a! »;>  o  -:--•  U •  •» O +> t> to 3 63 O O O O Fl  o •p  o H  u • BU >o PM O©  MM  pq O  03 i-i  rt© O Ft?« o3-< 03  >aO Fl 3  on +»o  CO  aj« r-ics  o  +» ©  <D P-ifl 03 05 OCO  H P  o o  •  ca c5o3 (4C  ft  n c3 CO  X  •H  -P k B> ©  -PQ 0>rt  oiS  ojp  A  O  o g  CS  •P  0 o  CO  flj O Wl2i  O Ei  •H a3 +» <D  «H •rt  B 0  o  Bj f-l •w *4  o5  03 F. U CD +s ^•H 3 © oS3 CO  X  X  X  X X  X X  X  digitale  X  X  X  X  X  X X  o F.  X  X  X  X  X  X  X  Aglantha proboscifer? Aglaura hemistoma  X  Amphinema a u s t r a i l s  X  Amphinema  turrida  X  Amphogona  apsteini  X  Botrynema  e l l i n o r a ii X  X  Bougainvillia B o u g a i n v i l l e siX  X  X  X X  X  X  X  X  X  X  X  Aglantha d i g i t a l s var. intermedia  X X  o •H  X  X  Aglantha  ©  o o  -=4  X  X  X  F! Ft <D -P ta ©  • Fl  i  X  X  X  Aequorea coerulescens Aequorea rugosa  Bougainvillia glorietta  u  o o  X  aequorea  BougainviIlia brittanioa B o u g a i n v i l l i a fulv; .  o  <H 05  X  X  X  X  X  X  X  X  X  X X  X X  X X  X  X  X  X  i  Catafclema vesloarium Ghiarella eentripetalis Olytia attenuata Olytia oylindrioa Olytia edwardsii Olytia hendersoni Olytia inoonBpioua Olytia ^ohnstoni Olytia klnoaidi Olytia nni-vorsitati Colofconeraa typioum Orossota Ircmnea Orossota pedunoiilat Cunina globosa  - 21 A  o  In • OH  0 ft  o  u a  »©  • a •H +-> CD  23  >i o t* a  M  •Pf»  4  M en  4  oo  4 FH >TH J3 W) cd© O (D <D O  OPH  Pi A3  o  CO CO-3  mo  o CO  o  o  e  M  © 63 w OB 4J O S O  cart  -M o &l C0..H t> fcSM 0 CD oJ c3 O CO 09  pl o  Ctmootantha ootonaria Ounootantha tenelli  X  Eotopleura dumortieri Eirene medusifera  X  Eirene mollis  X  J 5  4  O  0  -. «J  o  o  o  *)  •  o  G  4  X  X  X  X  X X  Eutima levuka  X  Eutimalphes browne;  X  i i i t o n l n a brownei  X  X  X  X X  acintillais  Geryonia probosoidalis (Joni on emus agassizii Goalonemus v e r t e n s  X  Gossea braohymra  X  Kaliereaa papillosum Halimedusa typus  X  Heterotlara anonymu X  CO k c5 o  r-]  o i  X  Eucheilota bakeri  Halistaura oellnlaria Halitholtis pauper  C8+5 WO o«af cfl o •0-1  «s a  4  X  Eperetmus typxts  Eutonina  •PO  M  I  Eutonina indicana  Pi  to o  - P 4J  Gunina peregrina  Endoorypta huntsma^i  o  O O  X X X  X  X  X  X  -  22  OH  u MP  03 ©  to N a pq  Hybooodon prolifer  0 a!  mi  » P •J  0  h •  A tf  a  -  +>{> MP ojo  -;• M  m *  oo OS  o •r-H  Z  Leuokartiara | X breviconis Leuckartiara Hobilis Leuckartiara octona  • Fi Ft © O ><w JS tO  a to © FH  F-1 P o  Cj©  CO  >sO Fi o © 01 •P «H  h  £P>1  Fl  •P o ©•H ©  o © O K  g  o 40  a! H  at  cdFi  >  CO-3?  totol 2©  (fl cfl  o o  OS o  •  •H  ooj FJ6 ci c;  a  Fl  OH  0 o  CO to  +» F. 4> O 03 © tO-H d-p  F.FJ  fed  < H c3 O o  c3 a H O o -P «3 ia Fi c3 o  W53  Fi<|  o  is  z  X  z  z  •HflJ -P<D FlF) 0)c8 r-lFi -PFi  o • .-! o P:  •HVH  O  •Pti P©  •  oa  X  Liriope species?  X  Liriope tetraphylla  X  Lynmorea alexandri  z  Melicertun campanula.  z z  Melicertum georgicum  z  Microoampana conica  z  z  X  z z z  z  Mitroeoma discoidea  z  Mitroooma sinuoaa  z  z  Neotxirris fontata  A  Heoturris pelagioa  X  Neoturris pileata  X  Obelia borealis  X  X X  Obelia commisuralisj Obelia corona  X  Obelia dichotoma  X  1  Obelia dubia  Z  z  Obelia  fraadlis  z z  z  z  X  43 .••1  CO  Uriope indica Liriope rosacea  o o O  53 © CO  •0 a u  Obelia  geniaulata  ffibelia  gracilis  Obelia  grifflai  Obelia  loaglssima  Obelia irniltident'ita Obelia  plioata  O b e l i a p-urpurea Obelia  surcularis  Obelia  species?  Obelia  species?  Cctooanna Polynesia Orohistoma  species'  Pandea r u b r a Pandea v i o l a o e a Pantacaogon haeokl! i Pennaria  pacifioa  Pennaria  speeios?  P&ialidlua  discoids  Phlalidiuia  l a n g u i d : urn  P a i a l i d i a a languidi UQ Tar. n n p i i l i a P h i a l i u m duodecimal i s P h i a l o p s i s die<;j©ns3  3  PhialTicium comata Polyorohis penicillata Proboscidactyla flavicirrata Proboscidaotyla Polynesia Proboscidactyla occidentalis Proboscidactyla ornata, var. stolonifera Ptyohogastria Polaris Ptycho ^ena californioa Ptychogena lac tea Hathke blumenbachii Rhopaloneraa velatim Sarsia coccometra Sarsia exiroia Sarsia flammea Sar3ia japonica Sarsia rairabilis Sarsia princeps Sarsia resplendens Scrippsia paoifica Sibogita simulans Slabberla brownei  25  • a  •p  01  l-t  n a  60 •H  u m  Slab&efia  oatenata  Solmissus  incisa  •  •  •  ta o PjO  M a a  -4  s  o  o  >>o  o o •  d  o  03 r-l  as a>  •  o«J  o mo  r-i W l-l  o 60  Jn CD > • OO OiH  Pi (0  U  S PI  r3<D  0P<  Co  ct! CD  O  cu a +> <rt +3  o to  O  a) Ft d  fioto P©  AH  >H S3  * <D  ftp* O  CI  o •H <H •H O  •H  o Pied oJS Ud flj  PIP-t to  X  o en  •H  ca a> o<j o •P 4-> CO U  <$ o MS  aj+>  a5 rO-t  -a  • O CD  4M  •  a  o a) P*  a] CD  o o o  a u 0) +3 CO <D  •H  o u -4  X  X X X  «H <M •H  X  X  X  X  Staurophora purpurea  X  X  X  X  X  X  X  A.  X  X  X  Steenstrupia occidental is  X X  X  X  X  Stomctoca  atra  Stomotoca  divisa  X  Stomotooa  ootaedrs  X  Tiaropsidium kelseyi  Zanclea  pi  o o  X  Solmtmdella "bi c e n t a c u l a t a Staurophora mertensii  Tiaropsis  a)  o  o  •HPl +»cfl S<D «}Pl <-<a5 4»fc  d i a d e m a l aX  gemmosa  X  X  X  X X  X  Zb  -  -  A Comparative D i s t r i b u t i o n  Table.  o  I © Orf £, w  r.  -»f ©  l ©  I o© cap & ©  6 Number of  species  Number of new Number of  from t h e e n t i r e  Coast  141  51  58  3  \  2  8  7  1  Island  54  20  19  and N o r t h of i t . n o t f o u n d N o r t h of i t .  25  10  12  21  0  11  E4  13  7  101  30  48  22  6  16  species  s p e c i e s new t o  the  Coast  Number of s p e c i e s N o r t h of V a n c o u v e r Number of s p e c i e s Number  in V . I . ,  Number i n V . I . Number of  common t o V . I . ,  .Region,  species  not found  S o u t h of  Number common t o V . I .  V.I.  S o u t h of  it  Region  and S o u t h of  it of  it  28  10  7  S o u t h of  it  79  25  32  46  18  23  t h e N o r t h e r n and Southern Divisions  24  6  15  the e n t i r e  13  4  9  and t h e S o u t h Pacific Number common t o t h e N o r t h e r n D i v i s i o n a n d t h e South P a c i f i c Numb e r common t o t h e S o u t h e r n D i v i s i o n and t h e South P a c i f i c  17  6  4  10  5  3  4  4  Number common t o  31  13  10  35  19  10  12  5  2  20  8  6  32  10  3  Number of  species  restricted  to North  Number of  species  restricted  to  Number of  species  in the V.I,  Number ©f s p e c i e s common t o Number of  species  common t o  Region  Coast  Number common t o t h e West C o a s t  Number common t o Number common t o Number common t o Number common t o  t h e E a s t a n d West C o a s t s of North America the N o r t h East A t l a n t i c and t h e West C o a s t t h e S o u t h A t l a n t i c and t h e West C o a s t t h e A r c t i c O c e a n and t h e West C o a s t t h e W e s t e r n P a c i f i c and t h e West C o a s t  i© OflJ  o CO  OM  Up  s  *-* o en Number common to the North Sast Atlantic Northern Division, "Western Pacific  An  s  © 1 cj OKI +»?  I o©  Art  ow  © Id be  CtfP*  Md EM© t-5S  c5©  a Ml  11  5  2  3  1  6  %  1  1  3  75  23  42  7  3  Number restricted to the Northern Division  5  2  1  2  0  Number restricted to the Southern Division  50  17  24  6  3  5  1  4  0  0  34  17  13  3  1  Number common to the South Atlantic, Southern Division, Western Pacific Number restricted to the West Coast  ,1  Number restricted to the Vancouver I. Region Number of species contained in the Collection  -  28  -  ORDER AlTTHOMEDUSAS. F a m i l y SARSIIDAE F o r b e s  emended.  F a m i l y OODOIIIDAB H a e c k e l . Genus P.SHI? ARIA Oken Pennaria -pacifica Penaaria  iDaoifica,  Clarke.  C l a r k e , Mem. Mus. Oomp. Z o o l . a t H a r v a r d , C o l l e g e , v o l . 3 5 , Ho. 1, p . 6 t p l a t e 1, f i g s , 1-6. 1907. M a y e r , A, G . , Medusae of t h e W o r l d , v o l . 1 , P. 28, 1910.  Pennaria pacifica,,  D i s t r i b u t i o n : - Pinoo  Island,  Pennaria Pennaria species?,  Gulf  of P a n a m a  species?  B i g e l o w , H. B . , Mem. Mus. Comp. Z o o l . a t Harvard College, v o l , 37, p . 1 8 6 , p l a t e 7, f i g . 6; p l a t e 40, f i g . 7, 1 9 0 9 .  . D i s t r i b u t i o n : - Aoapuloo Harbour  (Bigelow),  G e n u s STBaNSTRUPIA  Forbes.  gjjggjLij Wj? j a p Q . g jdan.kfilja. Steenstrupia occidental is,  (? ) Hybooodon o h i l e n s i s , Distribution:-  ( p a r t ) , M a y e r , Medusae of t h e v o l . 1, p . 4 2 , 1910.  Santa Cruz,  California.  Hybooodon p r o l i f o r HybopoAon proJUffQr,  Fewkea.  Fewkes, B u l l . Essex I n s t i t u t e . Salem, v o l . 2 1 , N o . 7 ; P . 1 0 7 , p l a t e 3, f i g , 1. 1889.  Genus HY30C0D0H L .  p.  (Clarke).  Agassiz,  L.,  243, 343, p l a t e  (Fewkes),  Agassiz.  L.  Agassiz.  Cont. S a t ,  23a,  World,  figs.  Hist.  10,  U.S., vol.  4,  1 1 ; p l a t e 2 5 , 19 f i g s . 1862.  * 29 * Hybooodon prolifer f Hartlaub, cl., Hordisches Plankton, lfg.6, P.98, fign. 94-97.  1907.  Hybooodon prolifer t Hartlaub, Cl., Hordisches Plankton, Lfg. 19, p. 399, 1917. Hybooodon prolifer, Mayer, Medusae of the World, vol, 1, p.38, plate 2, fig. 1; plate 3, fig.3.  1910.  Hybooodon prolifer, Bigelow, H. 3., Proc. U.S. Hat. Mus., vol. 44, p. 6,  1913.  Hybooodon prolifer, Praser, Some Hydro ids of the Von. 1. Region, p.130, plate X, fig,24, 1914, Distribution:- Dutch Harbour (Bigelow); Departure Bay (Praser).  Genus MICROCAMPAHA PewKes. Hiorooampana oonica Fewkea. Microcampana oonica, Pewlces, Bull. Essex Insitutute, Salem, vol. 21, Ho.7, p.Ill, plate 4, fig.8; American Naturalist, vol.32, .p.595, fig. 1889, Microcampana oonica, Mayer, Medusae of the World, vol. 1, p.44, 1910.  D i s t r i b u t i o n : - Under the c l i f f s Cruz I . ,  of P u n t a Diablo On S a n t a  California,  (Pewlces),  Genus SARSIA L e s s o n . ,3.&r„Bia 80g.cjP.HieArja -Bigelow. Sarsia coooometra, Bigelow, H. B., Mem. Mus. Comp. Zool. at Harvard College, vol.37, p.179, plate 7, fife.8; plate 40, fig.l; plate 43, fig.8,9. 1909,  - 30 Sarsia coocometra, Mayer, Medusae Of the World, vol,2, p.488, 1910. Distribution;- Ooast of Central Amerioa. (Bigelow). Bars la gala*a (Allman). Ooryne eximia, Allman, Annals and Mag. Hat, Hist,, eer. 3j vol.4, p.141,  1859.  Sarsia aximia,Boehm, Jena, Zeitschrift fur Haturw., Bd. 12, p.191, taf.6, fig.7-26| taf.7, fign,l-6, 1878. Synooryne exira,ia (hydroid), Nutting, Proo. Washington Aoad. 3oi., vol,3, p.166, plate 14, figs.3,4, 1901. Synooryne exiraia (hydroid), Torrey, University of California Publications, Zool., vol.1, p.31, 1902. Sarsia exiiaiaT Hartlaub, 01,, Nordisches Plankton, Lfg.6, No.12, P,8, figs.1,2a,2b,  1907.  Sarsia exlmla, Mayer, Medusae of the World, vol.1, p.57, 1910. Sarsia eximia, Bigelow, H.B., Proo. U.S. Nat. Mus,, vol,44, p.4, 1913. Sarsia eximia, Hartlaub, 01,, Nordisohes Plankton, Lfg,19, No.12, p,381, 1917. D i s t r i b u t i o n : - Juneau, Alaska ( H u t t i n g ) ; P a c i f i c California  Grove,  ( T o r r e y ) j Dutch H a r b o u r , A l a s k a , (Bigelow).  S a r s i a f l amino a L i n k o . Plate 1.  Fir;. 1 .  Sarsia flaroooa, Linko, Zool. Anzeiger, Bd*28, p.212, 1905. Sarsia fl amine a, Hartlaub, 01., Uordisches Plankton, Lfg. 6, Ho..12, figs. 4-6,  1907,  Sarsia flammsa, Mayer, Medusae Of the World, vol* 1, p. 64. 1910.  - 31 Sarsia flammea. Bigelow, H. B,, Keport Can. Arotio 3xped., vol*?lII, part H,p.4, flate 2, fig.5.  1920.  The collection Includes 24 specimens of this species, ranging in size from 2mm. to 9mm», in bellheight and from 1 mm. to 5mjn, in bell diameter.  There are 4 tentacles with definite broken  rings of nematocysts over the distal halves and with definite terminal knobs.  There aro no ooelli.  In some specimens, the gonads cover entirely the manubrium from the base to near the mouth. Colour of manubrium and gonads-brilliant red. Bigelow (1920) states that "the only character which has been invoked to separate them" ( S, f laiaaea Linko and S . .iapponica Maas) "is the fact that in the specimens of S. .japppniea so far examined by Maas and by me (1913), the sexual prodticts are irrigularly massed, while in S. flammea. they occupy the whole gastric wall except for its proximal and distal extremities". In the specimens of this collection examined, individuals were found possessing one form of gonad, that applied by Bigelow to S. .i at)'PoaioaT while others showed a gonad not separable into irregular masses.  Yet the shape of the tentaoles and the nemato-  cyst rings on the tentacles were quite similar;  the whole shape  of the bell agreed in each variety and there was no difference in colour.  Preserved in formalin, they become pale brown.  S. flammea and S» .iap'oonica may be identical but if not, there seem to be intergradlng forms having only one character, that of the shape of the gonads, at variance*  In such a case,  only a knowledge of the hydro id from which they arise will show whether they are identical or belong rightfully to different species.  • 52 6 specimens in the oollection, 8-10 mm. in oellheieht and 6-7 ma. wide, collected at Look Bay, reaained in doubt for soae tlma.  They have been placed, finally, undor JL,  XLAJJBUL&* <*ue to the shape of the bell, the similarity in the •haps of the manubrium and radial oanals.  The 4 tentaoles  are in poor shape, only one whole one being left intaot. In spite of its poor condition, however, it closely resembles those tentaoles of R , flftBBftft, described above. The oolour of the speoimens in the living state wastmanubrium and gonads-deep red; white.  tentaoles and radial oanals-  In the preserved state, the colours became:- aanubriua  and gonadt-pale brown;  tentaoles and radial oanals-white.  Pi stributiont- Cape Smyth, point Barrow, Alaska (Bigelow);  Banks Island;  vertioal haul, 100-0f., 1 aile H.3. of  Pive Finger Island; Departure Bay; Horthumberland Channel.  Sarsla japponloa, Maas. Sarsla .iapoonica, Mfci sT Japanisohe Lledusen, A oh.K.bay or .Akad. Wiss., vol.1, p.S, plate 1, fig.l, 1909, Sarsia .1apponioaf Bigolow, H^B., Proo. U.S. Hat, Mus., vol.44, p.4, 1913. Sarsia .iaioponioa, Hartlaub, 01,, Hordisohes Plankton, Lfg. 19, Ho. 12, p.382, fig,330, 1917. (Por discussion of 3^japponloa, see 3-^^pffifffta Linko, above) Diatributioni- Western Aleutian Islands (Bigelow).  Sarsia, mJLc&bilis L. Agassis. Sarsla, alrabllla, Agassis, L., Hea. Aaer. Acad,, Hew Ser., vol.4, p,224, paltes 4, 5,  1849.  -  fl»»vna • l r a a i l l a .  88-  A g a s s i s , A., f o r t h Amer. l o a d . , figs.  282-286.  p.lT5,  1866.  STnaarTne m l r a b l l l a r Torrey, U n l r e r s i t y of O a l i f o r n i s oatlons Zool., r o l . l ,  p.31,  Publi-  1902.  flay l a tubnlaaa L e s i o n , Tar. 2ftr8lft a U r i h U l s , L. Agtftsls, Mayer, Medusae of the World, r o l . p.68, p l a t e 8, f i g e . figs.1,2, Qarvna f o n r l t .  A g a s s i s , A.,  in L. A g a s s i s * s Oont. Hat.  Hist.  1862.  Svnoorvne r o a a s l a . Pewkes, Amer. S a t . ,  Sirili fflnrlit  2 , 4 , 6 ; plate 4,  1910.  U.S., TOl.4, p.340.  flg.7|  1,  TO1.23,  text f i g s . 8 , 9 ,  p.597, plate 25,  1889.  Hartlaub, 0 1 . , Hordlsohes P l a n k t o n , L f g . 10. 12, p.50, fig.46,  t,  1907.  f f ) 8 a » a i a r a a a r l a . Mayer, Medusae of the World, r o l . l ,  p.69, 1910.  (T ) a r a d l a t v a n angnlatnm.(young medusa), Murbaeh and Shearer, P r o s . Zool. Soo. London, v o l . 2 , p . 1 6 8 , Sara l a a m m l a t a , H a r t l a u b , 0 1 . , l o r d l s o h e s P l a n k t o n , Lfg. Ho. 1 2 , p . 1 6 ,  1908. 6,  1907.  ( ? ) Oodanlu» aplanlnm T Murbaoh and Shearer, P r o o . Z o o l . Soo. London, TOl.2, p.165, p l a t e 17, f l g . l t figs. 4,5,  plate 22,  1908.  (T) a a r a l a a p l a i i l a . Hartlaub, 0 1 . , Hordlsohes P l a n k t o n , Lfg. Ho. 1 2 , P.IV,  f i g , 9,  6,  1907.  ( 7 ) Sarala a p l a u l a t Hartlamb, 0 1 . , Hordlsohes Plankton, L f g . 1 9 , p.888,  1917.  The o o l l e o t l o n i n o l u d - s numerous speolsiens ran.jlng in s i s e from Emm, to 15 BOB. in b e l l h e i g h t and from 2mm, to 9 mm. in b e l l d i a m e t e r .  There i s a prominent a p i o a l  projecting  - 34 present in some individuals varying considerably both in shape and size, from a well rounded to a low, broad projection due, in all probability to a contraction of the bell.  A stiel canal  is present varying in shape from a long, sharply pointed to a short, rounded projection. smooth.  The radial oanals are narrow and  The manubrium varies greatly in length.  There are  nematoeyst cells covering the tentacles, clustered at the distal ends. One specimen in the collection., with a bell diameter of 8 mm, has 2 perradial tentacles well developed and the other 2, only bulbs.  The radial canals are narrow and smooth and where  they meet, the small tentacle bulbs, they expand out into a triangular pad from the other angles of which the circular canal runs out.  This quite probably occurs in the normal Sarsia but  is covered over by the upward growth of the large tentacle bulb. The manubrium is laclsing but the stiel canal and a small, swollen, transparent, circular structure above the stomach are present.  This swollen gelatinous structure above the stomach  has also been noticed in normal forms of S. mirabilis to ^rhich species this specimen undoubtedly belongs, being merely abnormal as regards the tentacles. As the hydro ids of S. mirabilis Of the Atlantic and the Pacific Coasts have been pronounced identical, it seems advisable to embrace their medusae under one species.  The hydroid of J5..  mirabilis with developing medusae has been collected at Departure Bay, attached to the piling of the wharf, so that there is no doubt but that the specimens collected are 3. mirabilis. Mayer (1910/ in his description of Sarsia rosaria states that it possesses an apica,l projection and nematoeyst pads flank-  - 35 lng the tentacle bulbs on either side.  Unfortunately there is  no figure of S. rosaria to substantiate this statement.  There-  fore, as the apical projection might be caused by contraction Of the bell, as other investigators have not reported the presence of nematocyst pads, and in view of the fact that Torrey (1902) unites the hydrolds of 3. mirabilis and 3, rosaria, it is probable that S. mirabilis and 3. rosaria are different stages of the same species.  Indeed, Mayer's description fits the one  specimen described above but from this collection of 3. girabilist it would appear that there was too much variation and interfradation to give a distinct foundation for two separate species. Distribution:- San Francisco, California, Gulf of Georgia (A.Agassiz); Santa Barbara, hydroid, (Fewkes); Puget Sound, hydroid, (Calkins); Bare Island, hydroid, (Hartlaub); San Francisco, hydroid, (Torrey); Sound (Murbach and Shearer); (Fraser);  Victoria Harbour, Puget  San Juan Archipelago, hydroid  Banks Island, Bull Harbour, Departure Bay, off  Snake Island, 15-0f., Off Newcastle I., Horth of Entrance I., ITorthamberland Channel, Dodds Harrows, Sound I,, Vesuvius Bay, Saltspring I.  Saraia orinoeps Haeokel. Sarsia oriaoeps, Ilaeolcel, 3yst. der Medusen, p.655.  1879.  Sarsia -prinoeps, Hartlaub, 01., Uordisch.es Plankton, Lfg.6, 10. 12, p.47, fig.44, 1907. Sarsia princeps f Mayer, Medusae of the World, vol,l, p.60, 1910. Sarsia urince'os. 3igelow, H.3., Proc. U.S. Nat. Mus. vol.44, p.5, 1913.  - 56 flarala  prlnmn.  Hartlaub, 0 1 . , Hordisohes P l a n k t o n , Lfg, 1 9 , 10. 12, p.383, 1917.  B a r e l a nglna«p» T Bigelow, H.B., Report Can. i r o t i o  Expedition,  TOl. T i l l , part H, p . 4 , p l a t e 1 , f i g .  1 , 1920.  Three speolmens are o o n t a i n e d in the c o l l e c t i o n whose r a d i a l c a n a l s are Jagged throughout the whole l e n g t h or part of t h e l e n g t h .  I n e l s e they are muoh s m a l l e r than those examined  by Bigelow or Hartlaub, the s m a l l e s t b e i n g 2 mm,, and the l a r g e s t 8 mm, in h e i g h t .  Nor i s the s t i e l eanal d e f i n i t e ,  being  q u i t e long and p o i n t e d in one speolmen and s h o r t and rounded in the other two.  The manubrium i s l o n g ,  Attribution;-  Southern Bering Sea ( B i g e l o w ) } Departure Bay, Dodds Harrows,  girili tMsUisUiM aigeiow. Barela r e s p l e n d e n t B i g e l o w , H.B., Mem. Mus. Oomp. Z o o l . Harrard C o l l e g e , fig.If  TO1.37,  plate 40, f i g . 8 ,  p.181, plate  at 7,  1909.  3arg3la regpiLgEuJens, Mayer, Medusae of the World, v o l . 2 , p . 4 8 7 , 1910. Distrlbutioni- Aoapuloo Harbour, Coast of Mexico (Bigelow),  Genua SCTOPL JURA.L. Agassis. Botoplaura dumortiari L.  asis.  Tubularla dumortleri. Van Beneden, Mem. Aoad. Belgique, tome 17, p.50, plate 2, 1844. jjotoploura duraortierl, Agassis, 1., Oont. Hat. Hist, U.S. rol.4, p.342, 1862. Sotoalewra dTimortt«rlf Hartlaub, 01., Hordisohes,Plankton, Lfg.6, Ho. 12, p.94, figs.90,91.  1907.  * at * Bctonleura dumortieri, Mayer, Medusae of the World, vol.2, p.488, 19X0. Botoflleura oohraoea,  Agassiz, U.S.  A , , in L . A g a s s i z ' s  vol.4,  Botopleura oohraoea,Bigelow,  p.343,  H. B . , Mem. Mus. Comp. Z o o l .  p l a t e 38, f i g s . J i.cap\ilco  12, 13,  Harbour,  Hist.  1862.  vard College, v o l . 3 7 , p.184,  Distribution: -  Cont. Hat.  at  p l a t e 6,  Har-  fig.5;  1909.  Coast of Mezioo  (Bigelow),  Genus SLABBjajjIA. F o r b e s . 31 al>berxa b r o_vmei ( B i g e l o w ) , Purena brownei, 3igelo?/, H.3., Help, Mas, Gomp. Zool, at Harvard College, vol.37, p.183, plate 7, fig. 7; plate 44, figs.8-10, 1909. Slabberia brovm.ei, Mayer, Medusae of the 7/orld, vol.2, p. 489, 1910. Distrioution;- Aoapulco Harbour, Ooastof Mexico, (Bigelow).  .Slabberia catenate Forbes and Goodsir. Slabberia oatcnata, Forbes and Goodsir, Trans. Roy. Soo. Edinburgh, Tol. 20, p.311, plate 10, figs. 3a-3e, 1835. Dipurena doliohpf.'iaoter, Hurbaoh and Shearer, Proe. Zool. Soc. London,•'••-• vol.2, p.169, 1903. Distribution:- Victoria Harbour (Murbach and Shearer).  Pamil? GLAD0K3MIDAJS Genus 3AIT0LEA Gegenbaur. Zanclea gemmosa MoCrady. Zanclea grQiaiaosa, McCrady, Gymn, Charleston Harbour, p. 49 plate 8, figs.4,5,  1857.  - 38 Z a n o l e a genunosa, B i g e l o w ,  H . B . , Mem. Mus. Cojnp. 2 o o l .  at  Harvard  College, vol.37, p.183, plate 7, fig.3;  plate  44, figs. 1,2, 1909, ffa&clea ^'emmoaa, Mayer, Medusae of the World, vol.1, p. 88, plate 6, fig.7, fig,5} plate 8, figs,4,5; vol2, p.489, 1910, Distribution: - itcapulco Harbour, Ooast of Mexico (Bigelow).  Agyphlnema  ^astral is (Mayer),  Stoaotooa austral is, Mayer, Bull. Mus, Oomp, 3ool. at Harvard College, vol,37, p.52, plate 1, fig.2, 1900. Amphinema austral is, Bigelow, H.B., Mem. Mus, Oomp. 3ool. at Harvard College, ^ol,37, p.199, plate 7, £ig.5j plate 38, figs,10,11.  1909.  Stoiaotooa octaedra, Mayer, Medusae of tlie World, vol.2, p. 490. 1910, Distribution:- Aoapulco Harbour, Goact of Mexico, (Bigelow).  Amrohiaeiaa turrida (Mayer), Dissonema turridaT Mayer, Bull, Mus, Comp, Zool, at Harvard College, vol.37, p.44, plate 2, figs.3,4, 1900. Arophinema turrida, Bigelow, H.B., Mem. Mus, Oomp. Zool. at Harvard College, vol,37, p.200, plate 7, fig.2; plate 40, fig.6; plate 43, fig,3; plate 44, figs.3,4,  19 OS.  Dissoneina turrida, Mayer, Medusae of the World, vol.2, p.490, 1910, Distribution:- Aoapulco Harbour, Coast of Mexioo (Bigelow).  - 39  -  Genus STOMPTOOA L . A g a s s i z . Stomotooa atra L. A ga s s i z. Stomotooa atra, iigassiz, .:.., Cont. Hat. Hist. U.3. vol, 4,p.347, 1862. Stomotooa atra, Agassiz, A., Horth Amer. Acal., p.169, figs. 271-273, 1865. Stomotooa atra. Haeclcel, Syst. dor Modusen, p.53, 1879. stomotooa atra, Mayer, Medusae of the World, vol.l, p.Ill, 1910. Stomotooa atra, Hartlaub, 01., HordisChes Plankton, Lfg. 17, p.25c, 1913. Specimens of various fists, up to a bell height of 27 mm, and a hell diameter of 30 mm. are contained in the collection, the largest coming from Ifeeda Bay.  The number of rudimentary  tentacles varied from 36-120 to a quadrant.  The colour in the  living specimens - manubrium, white; gonads, dark brown. Distribution; - G-ulf of Georgia, Strait of Rosaria, (Agassiz )j Loredo Channel, Ikeda Bay, Depature Bay (Kay-July), Friday Harbour, "/ash.  Stomotooa divisa Haas, Stomotooa divlsa, Maas, Mem. Mus. Comp. 2ool. at Harvard College, vol. 23, p.11, taf.l, fign. 1-9  1897.  Stomotooa divisa, Bigelo^vV, H. 3., Mem, Mus. Oomp, Zool, at Harvard College, vol.37, p.203, plate 7, fig.9} plate 43, figs. 6,7, 1909. Stomotooa divisa, Mayer, Medusae of the World, vol.l, p.114; vol.2, p. 490,  1910.  Distribution;- Bay of Panama, West Coast of Central America, (Haas); South East of Aoapulco Hsrbour, Coast of Mexico (Bigelow).  - 40 Genus M t M S P P g A Bigelow. Following Bigelow, (1916), this genus has been plaoed under the PandeidaaT the family it seems to resemble the most.  fia^imaduaa ^Pftl Bigelow. Halimadusa typus, Bigelow, H.3., Trans, Roy. 3oo. Canada, ser,3, vol.X, seot, IV, p.91, plate 1,9 figs.,1916. Distrlbutloni- Off Amphrodite Point, 7an.I. (3igelow).  Genus BHDOQBYPTA. Fraser. This genus is placed provisionally under the Pandaidaaf until suoh time as the mature medusae have been identified.  Endooryiota, HftfttgftaBa (Eraser). Omrtft huntBmanj, Fraser, West Coast Hydroids, p. 19, 1911, Endooryuta huntsman!, Fraser, Soienoe, vol.XXXV, p.216, 1912. ^ndoory^ta huntsraanl, frasor, Hydroids from the Van, I, Region, p.109, plate 1, fig.l, 1914, Distribution!- Departure Bay, Hanoose Bay, near Olarke Rook, off Protection I,, Friday Harbour (Fraser),  Genus j?Al;pat'. Lesson, P^dou, ru'j.-a Bigelow. Pandaa rubra, Bigelow, H.3., PrOO, U.S. Hat. Mus,, TOl.44, p.14, plate 2,,figs,l-7, 1913. Pandna rubra, Hartlaub, 01., Kordisches,Plankton, Lfg,17, Ho,12, p.340, fig,268, 1913. Dlstributipnt- Albatross Stations 4758, 4760 (Bigelow).  - 41 Panflaa v l o l a c a a Ag&ssis and Mayer. Pflndia T l o l i f l t a . A g a i B l i ! and Mayer, Bull,, Mus. Comp. Z o o l . a t  Har-  vard C o l l e g e , v o l . 3 2 , p . 1 6 0 , 1900. Pandea 7 l o l a c e a , Bierelow, H . B . , Mem. Mus. Comp. Z o o l . a t H a r v a r d College, vol.37, p.205, p l a t e 41, f i g s . 10,11. Pandea v i o l a o e a T M a y e r ,  Medusae of t h e World, v o l . 1 , p , 1 1 9 {  11, f l g . 7 t p l a t e 12, f i g . l ; v o l . 2 , p.490, D i s t r i b a t i o n ; - Acapuleo H a r b o u r , Coast of Mexioo.  190t.  plate 1310.  (Bigelow).  Genu s H.iLITHOLUS Har11 a u b . H a l i t h o l u j ; pft^pgr  Hartlaub.  P l a t e 1, f i g s . 2, 3 , Halitholus pauper,  Ha t l a u b , 0 1 . , H0rdi3cb.es P l a n i t o n , L f g . No. 1 2 , p . 2 7 2 , f i g s . 2 2 3 , 2 2 4 ,  1913.  includes f i v e speoiniens, a l l  s m a l l , the  The c o l l e c t i o n  17,  larg-  e s t h a v i n g a b e l l d i a m e t e r of 4 mm. There i s a d e f i n i t e a p i o a l p r o j e c t i o n p r e s e n t , o r i t y of c a s e s , p o i n t e d or c o n i o a l . e r a t e l y wide w i t h smooth n . a r j i n s . to t h e i r Ginall s i a e ,  in t h e m a j -  The r a d i a l c a n a l s a r e modThere i s no p e d u n c l e .  t h e ftonads a r e not f u l l y  Owing  developed but  are  b e g i n n i n g to a r i s e us f o l d s of t h e stomach w a l l , 4-6 in number. In t h a t p o r t i o n of t h e w a l l between each i n t e r r f t d i u s and p e r r a d iue.  There i s no c o n n e c t i o n between t h e 8 gonads e i t h e r  interr-  a d i a l l y or p e r r a d i a l l y as y e t , t h u s c o r r e s p o n d i n g more w i t h H a r t l a u b ' s f i g u r e of H. o l r r a t u a 227),  ( p . 2 7 6 , f i g . 2 2 5 and p . 2 7 7 ,  The manubrium e x - e n d s t o t h e v e l a r o p e n i n g .  fig.  There a r e  no m e s e n t e r i e s p e r r a d i a l l y c o n n e c t i n g t h e manubrium w i t h t h e  • 41 * subunbrellar well as In j^aflffarUtWle  **• U f t ara returned.  There are • large t i n t M l t i preeaat, 4 p e r r e d l a l l y u i i n t e r r a d l e l l y with large t n t M l i bulks.  4  There art t edredlal  tentoole knobs present and l a one quadrant, subrsdlal or aeoondary adradial t e n t a e l e e art appearing.  There i t a large round  • • • l i n t la eaoh t t n t a o l t bulb or knob. These speelmeus hart btta imolultt under B,BiltTTi **• to the a b t t n t t Of padunolt and m e s e n t e r i c and tho prosonoo Of O t t l l l ,  Thty oannot bo H. alr^ataa and tho laek of mee-  e a t e r i e s esaludee the* f r o * L « r t a > t t k P * aad Itftfcarrla* D i s i r i D u t i o n i - l o r t h s a s t t f PITO Plmgor I , , Departure Bay.  GtautLggXA^j^A^Hurtlaub. l>ri*flfc»r tiara onload (Plemlag). Plato 1* f l e a . 4 9 6. Garvoniu oaiona, Fleming, Id in burgh, Philoseph. Joarn. T t l . l , P.2S9,  ilia,  114X2 tapua, Bigelaw, 1 . 1 . , Mem, Mia* Ooap. *—U  *t Harrard  College, r e l . 3 7 , p.207, p l a t a 42, f l g a , 1 - 4 , It Of. y » » » l . ajJlPAaa Mayor, Maduaat t f the l o r l d , r e l . l , p . 123, plato 12, f i g . 4 | p l a t o 13, f i g . A,  ltio.  Louok^rtlaru ootana f Hartlaub, 0 1 , , l o r d l s o h s s Plankton, Lfg.17, Mo. 12, p,2tB, f i g s . 252-263, l t l S . Several specimens are lnoludod in the o o l l o o t i o n a o s t l y a l l of whleh art Tory email, tho l a r g e s t haying a b a l l diameter of 6 sat. aad a b a l l htight tf • ma. The speoimens resemble st o i e s e l y t h o s e , v f i g u r e d by l a r t laub that there oan bo no doubt aa to t h e i r i d e n t i t y ,  The  - 43 apical projection is commonly cone-shaped but a few specimens have globular or button-shaped projections.  The manubrium  extends down half-way to the velar opening ending in a mouth with fringed lips, and is connected to the subumbrella by a mesentery.  The margins of the radial canals are irregular.  The gonads are horseshoe-shaped and formed of several transverse folds, irregularly arranged.  The tentacles are of  2 kinds, large, and small, probably rudimentary.  The large  tentacles number from 8 to 16 with from 8 to 16 small ones. There is a dark red ocellus in each tentacle bulb.  The col-  our in the living specimens and also in the preserved ones:gonads and manubrium - dark red. The hydroid of Leuckartiara, Mayer believes, is Pereaonimus repens.  For literature, see Mayer, p.124.  Distribution;- Departure Bay, North of Five Finger I., Lock Bay, Dodds Harrows, Hound I., Tod Inlet.  Leuokartiara breviconis (Murbaoh and Shearer) Plate 2, figs. 1, 2, 3. Turrls breviconis, Murbach and Shearer, Annals and Mag. Hat. Hist., ser. 7, vol.9, p.73, 1902. Turris breviconis, Murbach and Shearer, Proo. Zool. Soc. London, vol.2, p.170, plate 18, figs.1,2, 1903. Turris breviconis, Mayer, Medusae of the World, vol.1, p.127, 1910. Leuokartiara brevjconis, Hartlaub, 01., Nordisches Plankton, Lfg. 17, No.12, P.304, Figs.254-256. 1913. The collection includes 5 specimens, 3 of which have a bell diameter of 15 mm. while the 2 smaller ones are 5 mm.  - 44 in diameter* The manubrium and bell are cubical in shape, the manubrium almost filling the bell cavity*  There are definite nesenteries  present connecting the inanubruim with the subumbrella at the parradii.  The lips are complexly folded and fringed.  The gon-  ads are oonfined almost v/holly to the perradii, forming a horseshoe-shaped structure and consisting of folds of the stomach wall running vertically, obliquely or transversely depending on their location.  Each gonad consists of from 25-30 folds.  In the interradial portion of the stomach wall bet-ween the arms of the gonad are numerous depressions in the form of pits irregularly placed.  The radial canals are wide with irregular margins.  These lateral diverticular are not definitely shaped or plaoed opposite each other as in Murbach and Shearer's figure (plate 1, fig.l).  The circular canal is in the main, regular but here and  there, lateral irregularities are formed. The tentacles number from 32 - 35 to a quadrant and are placed in two rows arranged in a zig-zag manner.  Some are  large and coiled but there are many small ones just developing. As in Murbach and Shearer's description, there are no definite tentaole bulbs but the proximal ends are laterally compressed and clasp the margin on either side.  There are no ocelli dis-  tinguishable nor can any trace of their presence be found. The small specimens closely resemble the larger except that there are fewer folds in the gonad, 16, and fewer tentacles, 100. In no case was there a definite apical projection marked off although above the stomach, the gelatinous substance was quite marked.  - 45 The colour in the preserved specimens - pale yellow. Distribution:- St.Paul I., Pribyloff Is. (Murbach and Shearer);  Near Point Barrow, Alaska (Pewkes);  Loredo  Channel, Departure Bay.  Leuckartiara nobilis Hartlaub, Plate 1, fig. 6. Leuckartiara nobilis, Hartlaub, 01,, Hordisches Plankton Lfg,17, Ho. 12, P.308, figs. 257-260. 1913. There are 22 specimens in the collection, all collected in the one locality and ranging in size from a bell diameter of 6 mm, to that of 15 mm, and from a bell height of 5 mm, to that of 17 mm.  The shape of the bell in the majority of  cases is cubical while in the remainder it is spherical, widest near the base and tapering slightly toward the oral end. A definite apical projection is present. The manubrium is four-sided and with the gonads, oocupies in the larger specimens, almost the whole of the bell cavity. It is connected with the subumbrella by a distinct mesentery. The gonads so closely resemble those of L. nobilist figured by Hartlaub (p.310, fig. 258 J that unquestionably the specimens belong to this species.  The two halves of each  gonad are connected only at the centre by a norrow connection.  They oonsist of 8 - 10 folds branched at the end. The radial canals are wide with irregular margins. Instead of 40 tentaoles as mentioned by Hartlaub, these  specimens possess only 32, 4 perradial, 4 interradial, 8 adradial and 16 subradial or secondary adradial.  The smaller  specimens have 5 perradial, 4 interradial and 8 adradial  - 46 tentacles, the adradials being merely knobs and the interradials, short tentacles, showing that the development proceeds in the regular order, porradial, interradial, adradial, subradial or secondary adradial.  All the tentacle bulbs po-  sess a dark red or dark purple ocellus while the tentacles display the peculiar construction of muscle clubs and nematocyst batteries as shown by Hartlaub (p.311, fig, 259), The longer tentacles are coiled at their distal ends. Colour:-  In the living specimens, the manubrium and gon  ads are dark red|  the ocelli are dark red or purple while  the tentacle bulbs and tentacles ars pale yellow.  In the  preserved specimens, the manubrium shows a faint tinge of red, the gonads are pale yellow, the ocelli derk red, the tentacle bulbs and tentacles pale yellow. Leuokartiara nobilis haB Deen reported only in Europe, in the Mediterranean and off Ireland,  Yet the specimens  collected so closely resembled Hartlaub's description and figures that It did not seem necessary to form a new variety even though there wag a variation in the number of the tentacles,  Hartlaub, in his figure of the tentacles of  L. nobilis (p.312, fig,260), hac shown two different arrangements of tentacle formation so that there seems to be sufficient variation to include these forms from the Pacific, Distribut ion;- Loredo Channel.  Genus 0ATA3LBHA Haeokel, Catablema multicirrata Kishinouye.  - 47 Oatablema multlcirrataT Kishinouye, Some Medusae of Japanese Waters, Jounr. Coll, Soi, Tokyo, vol 27, art.9, p.24, 1910. Oatablema mult iclrrata, Bigelow, H.B., Proc. U.S. Nat. Mus., vol.14, p.19, plate 1, figs,4-7, 1913, Oatablema multioirrata, Hartlaub, 01,, Hordisches Plankton, Lfg, 17, No, 12, p.321, figs. 268,269.  1913.  Distribution!- Orca, Prince William Sound, Alaska, Dutch Harbour, Unalaska I., Bering Sea (Bigelow).  Oatablema vesioarium (A.Agassis) Turris vesicariaT Agassiz, A., Proe. Bost. Soc. Hat. Hist., vol 9f p.97.  1862,  Turris vosioaria, Agassia, A., Horth Amer. Acad. p.164, figs. 261-268, 1865. Oatablema vesicariumf Haeokel, Syst. der Medusen, p.64, 1879. Turris vesicaria (part), Mayer, Medusae of the world, vol. 1, p.126, plate 12, figs. 2, 3;  plate 13,  fig.7, 1910. Oatablema vesicaria, var. nodulosa, Bigelow, H.B., Proc. U.S., Nat. Mus. vol.44, p.IV, plate 1, figs.8,9. 1913. Oatablema vesicarium, Hartlaub, 01., Hordisches Plankton, Lfg. 17, Ho.12, p.315* figs.263-267. Three specimens are included in the collection.  1913. The larg-  est has a bell diameter of 20 mm. and a bell height of 15 mm. There are 3 large and 9 small tent ...oles to a quadrant. radial canals are jagged.  The  The apical projection consists of  - 48 a broad, round, gelatinous mass almost as large as the bell itself. The gonads, consisting of linear folds, more closely resemble those of CL vesicarium of the North Atlantic as figured by Bigelow (1909c plate 1, fig.3), than those of 0. vesicarium ?ar. nodulosa  of Bering Sea (Bigelow, 1913, plate 1, fig. 8,9).  Bigelow states that he has found specimens in the Pacific corresponding to those of the Atlantio in the shape and structure of the gonads, so that in all probability this is an intergrading specimen. The smaller number of tentacles agrees with Bigelow's description of C  vesicarium Tar. nodulosa which Hartlaub  plaoes under 0. vosioarium. A smaller specimen has a bell diameter of 6 mm. and a bell height of 5 mm.  The apical projection is broad and  rounded, less pronounced than in the larger specimen.  There  are 8 tentaoles, comparatively large and 16 small bulbs. The gonads are similar in shape to those in the larger speoimen. The smallest specimen has a bell diameter of 1 mm. There are 8 large tentacles and 8 small knobs.  The gonads  are just developing but have the linear shape, characteristic of 0. vesicarium. Do.attributions Dutoh Harbour, Bering Sea (Bigelow); Departure Bay, Dodds Harrows.  Genus HEOTUHRIS Hartlaub. Hooturris fontata (Bigelow).  - 4f f n r r l s fontata f  Blgelow, B . B . , Men. ltua. Oomp. Zool. a t Harvard C o l l e g e , T O I . 8 7 , p . 2 0 9 , p l a t e 59, f l g . 8 | p l a t e 42, f i g s . 6 - 1 1 , 1909.  Olavnla fantata r Mav<»r f Waaturrla f a n t a t a ,  Medusae of the World, r o l . 2 , p . 4 9 1 ,  1910.  H a r t l a u b , C I . , Hordisohes P l a n k t o n , Lfg. 17, Uo. 12, p . 2 4 5 , 1913.  Dlatrlbutlam- Off the v/est Coast of Lower California (Blgelow).  ypOturrlB PQla^io^fl (Agassis and Mayer). Plate 2, fig. 4. Turrla nalagloar Agassis, A., and Mayer, Mem. Mus. Comp. Zool. at Harvard College, vol.26, p.142, plate 1, fig.2, 1902. Heoturris pelacioa, Hartlaub, 01., Hordisohaa Plankton, Lfg. 17, Ho. 12, p.244, 1913. There is one specimen contained in the collection whioh remained in doubt for some time.  It was definitely a Pandeid  but as only one specimen was at hand, no definite conclusions could be drawn.  It has been placed under Heoturris palagloa,  the species it resembles most. Bell diameter - 4mm.  Bell height - 6 mm.  The aploal projection of the exumbrella is round and dome shaped, about half the size of the bell itself.  The radial  canals are moderately wide and their margins are irrecr^lar or wary.  There are 24 tentaoles present of whioh the perradlal  and interradial are long and the rest small or mere knobs. They are coiled and covered with rings of nematooysts. The tentaole bulbs are large and laok ocelli.  The manubrium is  - 50 quadrilateral, filling up most of the bell cavity. is large with 4 recurved lips.  The mouth  The gonads are in the form of  small rounded papillae covering the sides of the manubrium. The colour in the preserved specimen is - manubrium, gonads, tentacle bulbs and tentacles, pale yellow. The specimen does not correspond with the figure of H, pelagioa at all closely but the description of this species applies in every detail to the specimen in the aolleotion. Distribution:- Pacific Coast of lower California (Agassia and Mayer); Departure Bay.  (?)ffeo„tu,r:rispileata (ForskalJ. Plate 2 t figs. 5, 6. Medusa pileatar Forskal, Desoriptiones Animal., p.110, 1775, Neoturris pileata, Hartlaub, 01., Hordisohee Plankton, Lfg. 17, Ho. 12, p*326, figs. 270-273-274.  1913,  The collection includes one specimen, bell diameter, 7 mm, bell height, 8 mm.  There is a definite apical projection  present tapering to a sharp point, into which passes a projection of the subumbrella.  There is no peduncle notioeable.  The gonads oonsist of 4 perradial rows of transverse folds with numerous pockets or depressions in the interradial area.  The manubrium is wide and short, connected to the sub-  umbrella by means of 4 perradial mesenteries. oomplexly folded. margins.  The lips are  The radial canals are wide with irregular  The ring canal is irregular.  about 60, long and coiled.  The tentacles number  There are no ocelli.  - 51 Owing to the lack of ocelli, the perradial structure, and the number of tentacles, this specimen has been placed under fft x>ileataf  There is no peduncle present, it is true,  but several of Hartlaub's figures show no peduncle apparent. The peouliar epical projection of the subumbrella is unusual in the family Pandeidae, but it is probably only an abnormal feature. The colour in the preserved specimen - manubrium, gonads and tentacles, pale yellow. Distribution:- Departure Bay.  Family B YTHOT IAKIDJ.E Haas. Genus 0ALY00PSI3 Fewkes. QslyOOPgia nematophora Bigelow. (? ) Sibogita simulana, Bigelow, H. B,, llam.Mus. Oomp. Zool. at Harvard College, vol.37, p.213, plate 5, figs.4,5; plate 41, figs.8,9| plate 43, figs. 1,2. 1909. SibOPita simulans, (part ),Mayer, Medusae of the 7/orld, vol.1, p.187, 1910. Oal,vcopsis nomatotthora, Bigelow, H.3., Proc. U.S. ITr.t. H U B , vol. 44, p.23, plate 2, fig.8; plate 3, figs. 1-3, 1913. Distribution;- Bering Sea, Western Aleutian Islands, (Bigelow).  • 52 Genus H3TER0TIARA Maas, Heterotiara anonyma Maas. Heterotiara anonyma, Maas, Craspedoten Medusen der Siboga Sbtpod., Monog. 1 0 , p . 1 9 , t a f , 3 ,  fign,19-21 1905,  H e t e r o t i a r a anonyma,  Mayer, Medusae of t h e World, p . 107,  vol.l,  1910,  H e t e r o t i a r a aiionyxaa, B i g e l o w , H , B , , P r o c , U , S , H a t , Mus. v o l . 4 4 , p . 25,  1913,  H e t e r o t i a r a . anonyma, H a r t l a u b , 0 1 , , H o r d i s o h e s P l a n k t o n ,  Lfg,17,  P . 3 5 0 , f i g s . 298-299, 1913. p i s . t r i b u t i . o n > - A l b a t r o s s S t a t i o n , 4759, B e r i n g S e a ,  (Bigelowfl,  Family OYgABIDAB. L, A g a s s i z , Genu a LYMNORRA Mayer, LypnQrga ;-lqa.andxl Mayer, Lymnorea a l e x a n d r j l , Mayer, Medusae Of t h e Bahamas, Mem, H a t , Soi, Mus. Brooklyn I n s t . A*ts 3 o i . t v o l . l , p l a t e 1# f i g . l - 5 a ,  p,10,  1904.  Lyanorea a l e x a n d r l , Bigelow, H . B . , Mem. Mus. Comp. Z o o l .  at  Harvard C o l l e g e , v o l . 3 7 , p . 1 9 3 , p l a t e 40, f l g s . 3 , 4 | p l a t e 44, f i g s , 1 1 , 1 2 ,  1909.  D i s t r i b u t i o n ! - Aoapuloo Harbour, Coastof Mexico  (Bigelow).  Jaiaily BeUGAIHVILLSIDAE Gegenbaur. Genus 30UGAIH7ILLIA L e s s o n . 3QU.rcgnv.tHia bpupajlnv j j j j j 3. ( B r a n d t ) . • t  Hlxrpooreae b o u g a l a v i l l j i ,  B r a n d t , R e d u e i l Actes s e a n o e s p u b l i q u e , Aoad. Imp. S o i . 3 t . P e t e r s b o u r g , p . 2 9 1  - 53 Hlnnoerane bougainv111llt Brandt, Acad, Imp, Sol, St. Peterabourg, Ser,6# vol,4, part 2, p,393, plate 20, 1853. Bougainvill la mertonaii, Agassiz, L,, Gont. H^t. Hlat. U.S., vol.4, P.34<i, 1862, Boup;alnvlllia mertensii, Agassiz, A,, Worth Amer. Aoal,, p.152,1865. (?) Bouptainv lliia superciliaris (part), Mayer, Medusae of the World, vol. 1, p.162, 164,  1910.  Bougainvill4a bougainvillei,Hartlaub, 01., Nordisches Plankton, Lfg. 15, Ho.12, p.159, fig.140, 1911. (? ) Hlppoorene mortensii, Murbaoh and Shearer, Proc. 2ool. Soc. London, vol.2, p.171, 1903. piptributiont- Bering Sea (Brandt); Gulf of Georgia, San Pranoisco(A. Agassiz)} Viotoria Hasrbour (?), (Murbach and Shearer).  Boufrainv ill ia britannioa (Forbes). Hippo crane britannioa, Forbes, Annals and Mag, Hat. Hist, vol,7, p.84, plate 1, fig,2, 1841. Bougainvillia britannioa, Forbes, British Naked-Eyed Medusae, p.62, plate 12, fig.l,  1848.  (? )Bougainvillia britinnioa, Bigelow, H.3,, Report Can. Arctic Ejcped., vol. Till, part H, p.5, 1920. Distribution;- Off Southern Alaska (Bigelow).  Bpufi'ajny illia July a Agassiz and Mayer. Bougainvillia xulva, Agassiz, A., and Majer, Bull. Muss. Oomp. Zool. at Harvard College, vol.32, p.162, plate 2, fig.6.  1899.  - 54 Bout?ainvillla, fulva, Bigelow, H.B., Mem. Mus. Comp. Zool. at Harvard College, vol.37, p.195, plate 6, fig,7; plate 44, figs, 5-7, 1909. Bougainvillia fulva,,Mayer, Medusae of the World, vol.1, p.160, 1910. Distribut ion;- Aoapulco Harbour, Coast of Mexico (Bigelow).  Boueainvil.lja, glpyietta Torrey. Bougainvillia glorietta, Torrey, University of California Publications, Zool. vol.2, Ho.l, p.7, figs 2, 3.  1904,  3ougainvillia glorietta, Mayer, Medusae of the World, vol.1, p. 172, 1910, Fraser (Hydroids of the Vancouver Island Region, p. 119, 1914) reports a hydrold of B. glorietta from Hammond Bay and has sinoe that time secured other specimens from the vicinity of Departure Bay.  Torrey states that the free medusae are un-  known* Distributions- San Diego, California (Torrey); Hammond Bay,'hydroid, (Fraser),  Baugainv11lia mult itentaculata.sp.nov. Plate 2, fig. 7. plate 3, figs.l, 2. 32 specimens have been collected at Banks Island, all approximately of one size, bell height, 10 mm.j bell diametor 10 mm. The bell is well rounded at the top and the gelatinous substance is quite thick, about 3 mm. ately thick.  The bell wall is moder-  There are four clusters of marginal tentaftles  - 55 situated at the base of the 4 radial canals.  The tentacle-  bulbs appear to take the shape of a wide, inverted V, and eaoh gives rise to from 50 - 60 short, hollow tentacles.  There is  a brown ocellus at the base of each tentacle and these are arranged in a zig-zag row in the tentacle cluster. is well developed.  There are 4 straight, narrow radial canals  arising from the four corners of the stomach. broad peduncle.  The velum  There is a low,  The gonads are perradially situated beneath  each radial canal.  There are four, radially-placed clusters  or oral tentacles, each of which branches dichotomously 6 or 7 times, eaoh terminal branch ending in a knob of nematooysts. The colour in the preserved specimens is pale yellow. The collection includes an immature form in which the gonads and manubrium are lacking.  The bell diameter is 7 mm.  There are four marginal clusters of tentaoles, less definite In shape than those described above.  Each marginal cluster  possesses 27 tentacles at the base of each of which there is a dark brown ocellus. An abnormal form of this species, B. roultiteutaculat.a, is contained in the collection which possesses 6 radial canals. In conjunction with these radial canals, however, there are only 5 gonads, 2 of the radial canals joining up to one gonad. Likewise there are 6 clusters of marginal tentacles, 50-60 arranged in a zig-zag row, and five clusters of oral tentacles. Distribut ion:- Banks Island.  BousajnTlUja norflgaarflij (Browne) Plate 3, figs, 3, 4. Marvel is nordgaardji, Browne, Bergens Museums Aarbcg, Ko. 4  - 56 Boucalnvillia nordgaardii, Mayer, Medusae of the 'tforld, vol, 1, p, 168, 1910, Boutrainvillia nordft-aardii,, Hartlaub, 01,, Hordisches Plankton, Lfg, 15, Ho,12, p.192, figs. 171. 1911. The single specimen of this species in the collection agrees in every respect with the description of B. nordgaardii,. except for the fact that the markings on the gonads of J3, nordgaardii are not mentioned.  Hartlaub's figure, hov/ever,  suggests exactly what is present in this specimen. This species has not been reoorded previously from the Pacific. Colour:- manubrium, gonads and tentacle-bulbs, - pale bro\?n in the preserved specimen. Distributions-  2 mi, ITorth East of Five Finger Island.,  vertical haul from 100 f.  BougainvJJ.lla^^sjj.^aj-Ml.i&Xl.a (Gould). Hipooerene bougainvilliiT Gould, Report on Invert, of Mass., p. 348, 1841, Hipt)ocr.ene s u p e r c U i a r is_, A p a s s i z , L . , Mem. Amer. Acad. ITow o e r . , v o l . 4 , p.250, plates 1-3,53, f i g s . Bou^ainvillia suporcll i a r j a , Agassiz, L,,  1849.  Cont. H a t . H i s t . U . S . ,  vol,4,p289, 291, figs.37-39; p.344, plate 27, figs. 1-7, 1862. gouK.ainvillla superoiliaris,Mayer, Medusae of the World, vol, 1, p.162, plate 17, fig.l, 1910. B oil t?a inv i.l 1 i a sup e re i 11 ar i s, 3 i e e l o W, H . B . , P r o c , U . S . H a t . H u e . , v o l . 44, p . 9 , 1 9 1 5 ,  - 57 There are 2 specimens of the genus BouKainvillia in the collection which so closely resemblo B .....guporciliaris that there seems to be no doubt of their position. Bell height - 6 mm.; boll diameter - 5 mm. Each of the 4 marginal clusters contains 21 tentacles, most of which have been, broken off close to their bases. is a black ocellus in each tentacle bulb.  There  The 4 clusters of  oral tentacles branch dichotomously 5 times.  The gonads are  Situated interradially, and, with the manubrium, are of a dark red colour.  No planulae could be seen on the side of the manu-  brium. Colour-manubrium, gonads, and tentacle-bulbs - roddish brown in the preserved specimen*. Fraser (Hydroida of the Vancouver Island Jlegion, p. 119, 1914) has found a hydroid BQUj.rainvill ia roertensjl which is common along the Bast Coast of Vancouver.!,  Although the hy-  droid of B. mertousii is unquestionably distinot from the hydroid of B. suporclliaris (by comparison), it is possible that the medusae liberated by each are simimar.  Owing to  the faot that p. mej» tGnsil is eocured only in depth hauls, never having been found in shallow water, and as it is very fragile, it has not oeen possible to study its lifehistory.  It has seldom been studied alive, as it Is gen-  erally dead before it reaohes the laboratory.  Until the  life history is known, the problem of Identifying the mature medusae liberated by It will not bo solved. jHetrioutioni- Attn Island (Bigelow); Departure Bay.  * 58 * Genus ftABHKB B r a n d t . g a t h k e b 1 u a g . i b g Q h 1 i. ( R a t h & e ) .  Oceania bluiaenbachii, liathke, Mem. Acad, Imp, Sci. St. Petere>ourg, tome 2, p.321, taf.l, fign.1-4 1835. aaGhke bl-amenbaohiiT Brandt, Bull. Sci. Aoad. 3t, Petersbourg, vol. 1, Itt. 24, p.137, 1837. Hathke blumenbach.iif Hayer, Medusae of the World, vol.1, p.177, 1910. Rathk;e blumenbaohli, Hartlaub, 01., Hordisches Plankton, Lfg, 15, So. 12, P. 228, 1911. Rathke blumenb:.i.ohiiT Bigelow, H. 3,, Proc. U.S. Hat. &us., vol. 44, p.11, 1913. Rathke blumenbachiif Hartlaub, 01., Hordieohes Plankton, Lfg. 19, Ho,12, p.40 3.  1917.  Several specimens of this sptjcies have been collected at Departure Bay, all about 2 mm. in diameter.  The marginal bulbs  number 8, each bulb supporting a cluster of 3 tentacles. case \7ero there more than 3 tentacles to a cluster,  In no  One case of  budding occurred, corresponding exactly with the figure given by Bigelow (1909o, plate 31, fig.5} of Llzzia ootopunotata (3ars) which species it is commonly agreed must give way to Rathke blumenbachii. Distribution;- Dutch Harbour, Bering Sea (Bigelow); Departure Bay, (Maroh and April). Genu s QiUARilLLA Maas. Ohiarelia centrioetalis Maas.  - 59 Ohiarella oentrjoetalis, Maas, Mem. Mus. Comp. Zool. at Harvard College, vol. 23, p.15, taf.2, fign.l,- 4, 1897. Ohiarella centripetal is, Mayer, Medusae of the World, vol. 1, p.182, 1910. Distribution:- Gulf of California, Coast of Mexico, (Haas).  Family V/ILLIADAB Forbes. Genus PR050S01DACTYLA Brandt. ?J?.QS Q s.p X&.Z& 1gl &,_.£ A ay i o i, r.r a jj a B r a n d t .  Broboscidactyla flavioirrata, Brandt, Kecueil Actes seances publ'ique Aead. Imp. Sci. St, Petersbourg, p.28,(of the"separaten) 1834. Proboscidaetyla flav loirrat.a, Agassiz, A., Korth Amer, Acal, p. 173, figs. 280-282. 1865. Proboaoidactyla f lavioirrats. j P.brovieirrataf Haeckel, Syst. der Medusen, p.l5S, 160, 1879. Proboscidaetyla brevicirrataf Murbaoh and Shearer, Proc, Zool. 5oc. London, vol.2, p.178, 1903. Proboscidactyla flavfcirrata, Mayer, Medusae of the World, vol. 1, p.189, 1910. Proboaoidaotyla f lavicirrata, Kartlaub, CI., Eordisohes Plankton, Lfg. 19, Ho. 12, p.366, figB. 312-315, 1917. This species is a very caramon one in the Strait of Georgia and has been oolleGted from April to as late as November.  The  largest specimens have a bell height of 7 mm, and a bell diameter of 5 mm.  The numbor of tentacles varies from 40 - 70 with a  corresponding number of brandies of the radial canals.  The centri-  petal canals, each with a patch of nematooysts at the proximal and, are very prominent, one between each suocessive pair of ten-  - 6» tacles,  Ooellis are present, sometimes more than one in a ten-  tacle-bulb. In the living specimen, the stomach, the gonads and the tentacle-bulbs are brown. One specimen, collected at Vesuvius Bay, Saltspring I., has a definite apical projection of the exumbrella.  This is  probably only an abnormal form as another specimen from the same locality agreed with the original description. Distribution;- Kamtchatka (Brandt); Galiano I., Gulf of Beorgia (A.Agassiz);  Victoria Harbour (Murbach and Shearer);  Departure Bay, Bull Harbour, Horth of Five Finger I., Berry Pt. Horthumberland Channel, Dodds Harrows, Hound I., Vesuvius Bay, Saltspring i.. Tod Inlet, Saanich Arm.  Proboscidactyla "occidental is11 (Pewkes). Willis occidentalism. Fewkes, Bull, Essex Inst., Salem, vol. 21, Ho.7, p.109, plate 5, fig.3, 1889.  Proboscidactyla oocidantalisT  Browne, Fauna and Geog. H a l d l v e  and L a o c a d i v e A r c h i p e l a g o s , v o l . 2 , p . 7 2 6 , 1904. Distribution;- Island of Santa Cruz, California, (Fewkes).  Proboscidactyla ornata, var. stolonifera Bigelow. Proboscidactyla ornata, var. stolonifera, Bigelow, H.B., Mem. Hus. Conp, Zool. at Harvard College, vol.37, p.220, plates 6, 41.  1909.  Proboscidactyla ornata, var. stolonifera, Mayer, Medusae of the World, vol.1, p.191, 1910.  - 61 Proboscidactyla ornata (part), Hartlaub, 01., Hordisches Plankton, Lfg. 19, Ho.12, p.368, figs.316-323, 1917. Distribution?- Acapulco Harbour, Coast of Mexico (Bigelow).  Pjroboscidactyla polynema (Hartlaub). Plate 3, figs.5, 6, 7. Plate 4, fig. 1. Poohella Polynesia, Hartlaub, CI., Kordisches Plankton, Lfg. 19, Ho.12, p.414, figs. 344-546,  1917,  The collection includes 25 specimens most of which are in excellent condition. ,  In size, the bell diameter varies from 2-4 mm.  The manubrium  Is broad and four-sided with the gonads developed on eaoli side as in Hartlaub's figures.  There are 4 straight, narrow radial  canals rxxnning from the corners of the stomach directly to the bell margin.  From either side of each radial canal, fine, thread-  like branches are given off, invisible except under the high power microscope, running to the tentacle bulbs.  There are  about 6 of these branches on each side of a radial eanal. The tentacles are short and thick, almost transparent, with large durk tentacle-bulbs. No ocelli are present.  There are 12 tentacles in each quadrant. There are no centripetal canals as in  P. flavicirrata. Hartlaub, in the discussion of Pochella polvnema makes mention of the resemblance of his specimens to the Williadae group, presumably Proboscidactyla, not only in the shape and size of the bell but also in the shape and structure of t h.e tentacles and tentacle-bulbs.  He has noted the absence  - 62 of t h e c e n t r i p e t a l  canals.  were a l s o n o t i c e a b l e , ending b r a n c h e s .  tentacle«-bulba  readily  originated  that  in the  c a t i o n with the  some a s s h o r t p r o j e c t i o n s ,  or  the branches radial  of  the radial  oanal but were a l s o  tentacle-bulbs,  resemble exactly H a r t l a u b ' s  canal  as  blindly  specimens reached  that  those  specimens  figures  no  in t h i s  seen  only communi-  tentacle.  specimens,  studied  by  really  collection  of P o c h e l l a T>ol-vnema  In n e a r l y e v e r y c a s e , P r o b o s c i d a c t y l a same h a u l a s P„  c o u l d be  in d i r e c t  one b r a n c h to each  h a v e b e e n named P r o b o s o i d a e t y l a  C o l o u r : - Manubrium,  it  as P o c h e l l a polynexna were  P r o p o s e i d a c t y l a and s i n c e t h e  in the  the  a t hand In t h e c o l l e c t i o n ,  H a r t l a u b and c l a s s i f i e d  collected  others  canal  not.  I t w o u l d seem t h e r e f o r e ,  the l a t t e r  of t h e r a d i a l  to a s c e r t a i n whether t h e s e branches  In the specimens quite  The d i v e r t i c u l a  Owing t o t h e p o o r c o n d i t i o n of  H a r t l a u b was u n a b l e the  -  polynema. flavicirrata  was  Polynesia.  g o n a d s and t e n t a c l e - b u l b s ,  D i s t r i o u t i o n : - D e p a r t u r e Bay ( A p r i l  -  light  brown.  June).  ORDER LBPTOMEDUSAE. gamily__THAUMAHTIADA}j  Gegenbaur.  Genus MSLIOaRTUM O k e n . M e 1 i c e r t u r n c a m p a n u l . 3 Oken. Eelicerturn campanula,  Olcen, A l l g e m a i n e l l a t u r g f u r Bd. 5 , p . 2 2 6 ,  Mel j c e r t u m c a m p a n t i l a ,  Agassiz, 1 . , p.349.  Mel i c e r t u m a amp a n u l a, M a y e r , plate  alle  Stande,  1835. Gont. Hat. H i s t o r y U . S . ,  vol.4,  1862. l i e d u s a e of  t h e World, v o l . l ,  23, f i g s . 4 , 5 ; plate  24, f i g . 5 ,  p.207, 1910.  - 63 The c o l l e c t i o n i n c l u d e s a number of specimens of species.  B e l l d i a m e t e r - 1 0 - 1 5 mm;  There a r e about 75 l o n g , f l e x i b l e marginal  this  b e l l h e i g h t , 9 - 1 2 mm.  tentacles.  There a r e no  cirri.  The manubrium and gonads a r e o c h r e y e l l o w i n D i s t r i b u t i o n ! - 3anics I . ,  colour.  D e p a r t u r e Bay (May to O c t o b e r ) .  M e l i c e r t u m georElouin A. A g a s s i z . M e l i c e r t u m Keorgioma, A g a s s i z , A . ,  i n L. A g a s s i z ' s Gont. H a t .  H i s t . U . S . , v o l . 4, p . 3 4 9 ,  1862.  M e l i c e r t u m e e o r ^ i o u m , A g a s s i z , A . , ITorth American £ c a l , p . 1 3 5 , figs.  2 1 5 , 216.  1865.  M e l i c e r t u m c-eorgicum t Haeclcel, 3 y s t . der Medusen p . 1 3 7 , 1 8 7 9 . M e l i c e r t u m gaorraeug-, Mayer, Medusae of t h e World, v o l . 1, p . 2 1910. D i s t r i b u t i o n ; - Gulf of G e o r g i a (A. A g a s s i z )  Genus OBCIilSTOHA H a o c k e l . Orchistoaa Orchistoma,  species?  s p e c , n o v , , Haas, Mem. i i u s . Oomp. 2 o o l . a t Golloge, v o l . 2 3 , p . 2 0 ,  Harvard  1897.  D i s t r i b u t i o n ; - Gulf of Panama ( H a a s ) .  Family lAODiO IUDA:]  L. A g a s s i z .  Genus PTYOHOGZEIA A. A g a s s i z . Ptycho^ena Q a l i f o r n i e a Ptyofaogena c a l i f o r n i e a ,  Torrey.  T o r r e y , U n i v e r s i t y of C a l i f o r n i a P u b I , Zool., vol,6, p.13, f i g s . 1 , 2 .  1909.  - 64 Ptyohogena californica, Mayer, Medusae of tlie World, vol.2,. p.494,  1910.  Distribution?- San Diego, California (Torrey).  Ptyohogena laotea, A. Agassiz. Ptvchogena lac tea, Agassiz, A,, Horth Amer. Acal. p.137, figs. 220-224,  1865.  Ptyohogena lactea T Mayer, Medusae of the World, vol.1, p.215, 1910. Ptychosena laotea, Bigelov, H.B., Proe. U.S. Hat. Mus. vol. 44, p.28,  1913.  Distribut iont- Bering Sea (Bigelowj.  Genus STAU'ROPHORA Brandt. Staurophora mertensii Brandt. Staurophora roertensij, Brandt, Mem. Acad, Imp, Sci., St. Petersbcurg, Sci. Hat., ser.6, tome 4, p.400, taf.24,25.  1838.  Stauronhora mertensii T Mayer, Medusae of tlie World, vol.2, p. 291, plate 26, figs. 4-9, (vol.1) 1910. Staurophora mertensii,, Bigelow, H.B., Pros. U.S. Hat, Mus., vol.44, p.27,  1913.  Distribut ion?- Iforfolk Sound, Off Aleutian I., (Brandt); Dutch Harbour, Prince William Sound (Bigelow),  !?.la:A£.Qj?hora purpurea, sp.nov, Plate 4, figs. 2-5. Bell diameter ~ 20 mm.  Bell height -10mm.  Gelatinous substance thiols:.  Most of the tentacles have  been knocked off, but there are about 150 large tentacle-  - 65 knobs.  Those few tentaales, which are complete, are short,  the basal bulbs are quite broad| the walls of the tentacles are thick; studded with nematocysts and enclose a hollow cavity.  Ho ocelli could be made out nor any traceof their  presence.  There are about 100 lithocysts each containing  a spherical concretion.  They do not seem to follow any  definite order of arrangement but are placed irregularly around the margin, about 25 to each quadrant.  The most  striking characteristic of the specimen is the great development of the lips.  These consist of 4 folded masses,  curtain—like in appearance, hanging down almost to the bell margin.  The lips are fringed around the margin.  The mouth  is a long, moderately wide slit, opening at each corner into a radial canal.  The connection between the mouth and the  radial canals could be distinctly seen but the radial oanals were not open for any appreciaole length.  Along ea^h side of  each radial canal depanded curtain-like structures, extending from the mouth to the jell margin but these showed no marked connection with the lips.  They are longer than the length of  the radial canals and are thrown into sinusoidal folds.  There  are no diverticula projecting out from the radial canals as shown in liayer's figure of Stauroohora mertonsii. A Droad, low peduncle is present out the shape of the bell would indicate that this was caused by contraction. Colour:- In the living specimen, gonadal folds, lips and radial canals- purple;  in the preserved specimen, lips-dark brown,  gonads-pale brown, tentacles and radial canals-white. As there is only one specimen in the collection, it is rather hard to form definite conclusions as to its exact  - 66 specific characters.  Mayer describes a Staurophora mertensii  at a stage of 20 mm., in -which the mouth has extended halfway down the radial canals.  He mentions the fact that the  lateral diverticula of the radial canals are developed only in the adult. men discussed.  This would explain their absence in this speciBut the absence of ocelli definitely exclude  it from the species 3. mertensii or S. falklandipa Browne, Therefore it has been given a new specific name, the characters of which are lack of ocelli, less rapid development of the slit-like mouth and definite purple colour. Distribution:- Off Entrance I,, in plankton net dorm to 200 f.  j?amiil,yiiP0LY0R0Ij.I.:j^ A. Agassiz. Genus PQLYOROHIS A. Agassiz. Polyorchis penicillata,. A. Agassiz . Polvorchis penicillata. Agassis, A., in L. Agassiz's Cont. Hat. Hist. U.S., vol. 4, p.349,  1862.  Polyorchis penicillata. Agassiz, A., North Amer. Acal., p.119, figs. 179-183.  1865.  Polyorchis penicillata. Fewkes, New Invert, from the Coast of Calif., p.5, plate 4, figs. 6,7, Melicartum penicillatus.53Chsoholtz T  1889,  Syst. der Acal., p.106,  taf. 8, fig. 4,  1829.  Polyorchis plnnatus + P. penicillatus, Haeckel, Syst. der Medusen, p. 149, taf.8, fig. 13,  1879.  Polyorchis miauta, Muroach and Shearer, Proc. Zool. Soc. London, vol.2, p.174, plate 19, fig.3; plate 22, fig,l, 1903.  - 67 P 0 1 y o r p h i s p en i o i 1 1 a t , a , Mayer, Medusae of t h e World, v o l . p.218,  1,  1910.  Pol yore his minuta, Mayer, Medusae of the World, vol.l, p.219, 1910. Mayer reports a P. penicillata whose dimensions are about 59—60 mm. high, by 30-40 mm., wide.  In the specimens which  have been studied, the largest had a di.iioter of 40 mm., and a height of 42 mm.  A slight apical projection was present.  As against the 56-40 tentacles in Mayer's description, the average number possessed by the large ones in the collection was 64, or 16 to a quadrant.  Their basal bulbs are elongated  and spindle-shaped and possess a purple ocellus but the ocelli vary in their position according to the length of the tentacle-bulb- each ocellus being situated where the tentacle becomes detached from the exumbreller surface. velum is strong and about 2 ram. in breadth.  She  In Mayer's  description "the 4 radial canals give rise, each, to 15 25 pairs of simple short and unbranched, blindly-ending, lateral diverticula",  Those specimens examined showed  the lateral diverticula to number 35 - 40 on each radial canal and these diverticula had simple, forced or clubshaped ends, according to the state of development.  A.  Agassiz, in his original description, states that the diverticula have "knotty, club-shaped" ends so that there appears to be a variation in the shape of the ends of these diverticula. The size of the peduncle likewise differs from that of Mayer's specimens in that, in the larger forms, it is quite extensive, having a width of about 8 mm. and a depth of about  • 68 4 mm.  In many forms, the diverticula are scattered along the  radial canals in that portion from which the gonadal sacs dep but they are fev; in number and quite small. Colour:  gonads, manubrium and tentacle-bulbs, purple,  Polyorohis minuta, Murbach and Shearer, seems to be a young form of P. penioillataf  There is a decided similarity  in the number of tentacles and their method of development. The stomaoh, manubrium and lips correspond with the specimens of P. penicillata.  The number of lateral diverticula on the  radial canals agrees and the fact that they are simple and unbranched and do not have club-shaped ending3 is due to the fact that they are not fully developed.  Specimens of the  same size have beon examined which possessed simple diverticula but correspond to Pn paaioillata, in every other respect. Their position and method of growth corresponds.  Therefore  as there seems to be considerable variation in the development of P. penicilleta, as there is a definite similarity between P P minuta and those speeimans of all sizes examined, and as Muroaoh and Shearer base their new species on size along, a doubtful difference, it is believed that P. minuta is only a young form of P. penicillata. There follows a tabular list of specimens examined, in which a definite gradation seems to occur, according to the size of the individuals:-  - 69 Bell diameter in mm,  Bell height in mm,  Humber of tentacles  Branches Gastric of radBilaial canals ments  Lips  Hone  Hone  Simple  30-35  Hone  "  Pedunole width by depth in mm. Beg I n n i n g  2.5  2  4  8  4  304  4  5  4  30  4  5  6  30  5  6  8  30  2  5  6  10  30  3-4  6  7  12  30-35  6  7,5  6( s m a l l )  7  7  1 6 { sma 11 )  35-40  ?  8  8  35-40  8  9  12  40  B  8  10  12  35-40  A  it  10  10  1 2 - 14  3 6-40  4  it  n  11  13  14  4ft  7  n  !t  12  15  17  35-40  6  n  II  14  15  16  35  4  «  16  • 18  17-18  35  6  18  18  18  35  6  'i  5 toy 3  20  20  1 6 - •18  30-35  3  it  6 toy 3  20  21  17  37  6  M  20  22  16  35  6  n  6 toy 4  22  23  18  20  8  tt  7 toy 3  22  24  19  35-40  7  tt  8 toy 2  Zo  23  21  30-38  7  H  1  2G  26  16  35-40  3  it  8 toy 4  16 21 30  35-40 32-38 35-40  8 3 10  33 28 40  25 24 42  ( l a r ge )  40  2  ti  g  'i  l.toy . 5 by  recurved  n  ii  n  folded  5  n  1 by  :2 toy 1 . 5 1.5  4 toy  fringed  il  1.5  it  complezl y folded  tt  .5  rf  II  M  .5  1 toy 1  it  4-6  5  •t  .2  tt  tt  toy 2  1 0 toy 4 1 1 toy 5  - 70 From a study of this series it is clear that the gonadal sacs increase in number as the individual grows.  This app-  lies also to the length of these sacs, although there seeius to be a variation in the method of growth, that is, the sane gonadal sac does not always appear the longest.  In some cases  the middle aac is the longest; in other cases, the sac nearest the stomach has the greatest length, while In a third case, the second gonadal sac from the distal end is the longest.  In  any case, there is the regular gradation in growth and development, those gonadal sacs at either end being smallest while generally, those near the centre of the row are thelongest. They are in the beginning mere knobs; in the largest forms, they extend to or beyond the velar opening. The lips also appear to increase in size and shape, developing from simple to complexly folded and fringed. The number of lateral diverticula en each radial canal seems to be fairly constant, J 0*4-0, for small as well as large specimens.  A difference is sesn, hov/ever, in the length  of the diverticula.  In the youngest specimens, they are either  not noticeable or barely so as very small projections or notches.  Prom this, they gradually increase, until, in the  larger forms, they are several times the width of the radial canal and definitely branched or possessing club-shaped ends. Very few of them are directly opposite.  In one form, 20 mm.  in diameter and 22 mm, high, there sere 5 diverticula directly opposite; the remainder were irregularly placed.  -3ome  were bent over until they almost touched the next diverticulum below.  Those diverticula towards the centre of the radial  canal are always longer than those at the ends, the latter  - 71 being mere projections at the extreme ends of the canals. An. increase in the size of the peduncle is also noticeable. Pis iribut ion;- San Francisco, Gulf of Georgia, (Agassiz; oanta Bara, Santa Oruz, San Francisco (Fewkes); Puget Sound, (Murbaoh and Shearer); Bull Harbour, Departure Bay, Uewoastle I.; Sea Otter Gove, Grants Landing (West Coast).  Genus SQHIPPSiA Torrey. Sofiposia pacific a T orrey, Scrinpsia p.aoifica, Torrey, University of California, Publ. Zool, vol. 6, Ho.2, p.15, fig.3.  1909.  ocrippsia pacifica, iiayer, Medusae of the World, vol.2, p.493, fig. 327.  1910.  pistrIbut ion:- La Joila, San Francisco, (Torrey).  Family MITflOCOIUDAa H a e c k e l . Genus fclTROOOIU. H a o e k e l . Mitroooica d l s c o i d e a ,  Torrey,  Mitrocoma d i s c o i d e a , . T o r r e y , U n i v e r s i t y of C a l i f o r n i a , Zool., vox.6, p.17, f i g , 4 ,  Publ.  1909.  Mitroooma disooidaa, Mayer, Medusae of the World, vol.2, p.289, 1910. Four specimens are included in the collection. diameter - 6 mm.; bell height - 4 mm. condition.  Bell  All are in excellent  There are from 100 to 140 tentacles with thick  conical ba3al bulbs and coiled distal ends.  Between each  two tentacles, there is a short, transparent cirrus.  The 11th-  ocysts number from 2 to 4 to eaoh quadrant, each containing several concretions. There a-j no ooelli. The radial canals are narrow and straight and are thrown into folds along their  - 72 upper margin.  The gonads are narrow and linear, extending along  the entire length of the radial canals, leaving only the ends free. There is no pedunole.  There are four prominent, recurved  lips. The specimenaresemble M. discoidea, in many respects and inasmuch as the description given by Torrey is of a very large individual, and as the specimens here described differ in details which are subject to change in development, they have been considered as specimens of M.. disooidea T Colour:-  In preserved specimens, manubrium, gonads and  tentacle-bulbs, dark brown. Distribution;- San Diego, California (Torrey); Departure Bay. Mitrocoma sinuosa sp.noT. Plate 4, fig. 6. Bell diameter, 4 mm.  There are about 50 tentacles  with thick, conical basal bulb3.  Between each successive  pair of tentacles, there are from 3 to 5 transparent marginal cirri.  The veluir. is well developed.  There are 12 litho-  cysts present, 3 in each quadrant, consisting of open folds or pockets on the subumbrellar side of the velum. no ocelli.  There are  The radial canals are narrow and straight.  The  gonads are prominent, lying in two rows, one on each side of the radial canal, thrown into sinuously formed curves. They are confined to the distal half of the radial canal not quite reaching to circular canal. peduncle.  There is no  The stomach is wide and quadratic.  The manubrium  is short ending in a large wide nouth with four large recurved lips.  Tliis  specimen d i f f e r s  of l l t h o c y s t s , and in  -  from M. d i s o o i d e a  t h e n u m b e r of  tentacles  t h e s h a p e a n d l e n g t h of  smaller quite  73  number  and m a r g i n a l  the gonads.  t h a n lu. d i s o o i d e a and y e t  in t h e  It  the gonads  is  cirri much  seem t o  be  mature. Coloiir  of p r e s e r v e d  specimen:- very pale  D i s t r i b u t i o n ; - H o r t h of F i v e F i n g e r  Genus GAMPELIQiUM  I.  Torrey.  Cam-pel i c i m a a e a u s i f erum 0 am p e 1 i c i u m ma du s i r e r a m ,  Torrey,  Torrey.  U n i v e r s i t y of  Publ.  Zool., vol.1,  figs.  26-29,  D i s t r i b u t i o n : - Long B e a c h ,  California,  p.48, plate  3,  1902.  G a m p e l i c i u m modus i f erura, M a y e r , k e d u s a e p.290.  brown.  of t h e W o r l d ,  vol.2,  1910. California  (Torrey),  Genus RA.LI ST Ali 3A B i g e l o w . Halistj^iXff. Plate Laodice c e l i u l a r i a ,  pelJ 1 uJLar_i ; a (A. 5,  Agassiz, figs.  figs.  1,  Agassiz).  2.  A . , B ' o r t h Amer. A c a l . ,  195, 196.  T h a u m a n t i a s c a i l u l a r i a f Maeokel.. S y s t .  1365. der liedusen,  T h a u m a n t i a s o e l l u l a r i a T Murbaeh and S h e a r e r , f r o c . London, Thaumantias ce11u1 aria,Mayerf p. Halistaura  oellularia.  p.172, plate Medusae of  199.  Bigelow, vol.  p.127,  17,  p.129. «ool.  figs.  the world,  1879,  3oc.,  2,2b.  vol.  1,  1910. H. 3 . , P r o c . U . S . N a t .  44, p . 3 0 ,  1913.  Mas.,  190  - 74 Numerous specimens are included in the collection, ranging, in size, from 7 to 70 mm. bell diameter, and from 6 to 30 mm.t bell height. to 300 in number.  The tentacles range from 180  There are sense pits on the subumbrellar  side of the velum and produced as pockets between the tentacles, projecting from the exurnbrellar side of the velum.  The variation in these sense pits is as follows:-  Bell Diameter  Tentacles per quadrant.  Sumber of sensepits per quadrant.  60 mm.  75  6  60 mm.  75  4  60 mm.  75  60 mm.  75  5  60 mm.  75  4  44 mm.  70  5  17 mm.  54  4  7 mm.  50  4-6  50 mm.  78  4  15 (abnormal)  Host of the sense-pits are semicircular or crescentic in shape but some, probably oontraeted, are almost quadrilateral*  In no case could anything resembling otocysts  or otoliths be found even in the live specimens. .Distribution; - Gulf of Georgia, Port Towns end (i. Agassizjj Puget Sound, Victoria Harbour, Friday Harbour (Murbach and Shoai'orj,  Southern Alaska, Puget Sound, (Bigelow); Horth of  Jive Finger I., Departure Bay, Rocky Bay, Gabriola I., Tod Inlet, Saanich Arm, Friday Harbour.  - 75 Genus TIAROPSIS L. Tiaropsis Tiaropsis diademata,  d i a d e m a t a L.  Agassiz,  L.t  p.289, plate Tiaro-psis diademataf  Mayer,  diademat^  6, f i g s .  1-16;  plate  4,  8,  fig.11 1849.  Medusae of t h e World, v o l . 2 , p . 2 5 8 ,  Bigelow, p,33,  Agassiz.  Hem. Amer. A c a d . , v o l .  plate 31, fig. Tiaropsis  Agassiz.  11;  plate  32, f i g s .  8,9,  H.B., p r o c . U.S. Hat. Hus.,  19  vol.44  1913.  Distribut ion;- Dutch Harbour, ^gattu Island, Bering Sea. (Bigelow).  Genus TIAHOPSIpIUM T o r r e y . Tiaropsid^m^^lj5eyi_T Plate  4, f i g .  Torrey.  7.  T iaro'psidium kelseyi f Torrey, University of California Publ. Zoo!., vol. 6, p.19, fig. 5, 1909. Tiaropsidium kelsevi^ Sayer, Medusae of the World, vol.2, p.494, 1910. Bell diameter, 50 nun.; oell height 30 mm. The specimen corresponds with Tcrrey's figure and description except that tnere are 8 rudimentary tentacles between saoh large tentacle and 9ach pigmented otocyst. pigment of the entoderroal pit is black.  The  The gonads are  curtain-like, much folded end about 4 mm., in width. At the proximal end of each radial canal, between the end of the gonad and the manubrium are located numberous tentacular processes.  In three of the quadrants, they are  damaged considerably and only thrae complete processes could be distinguished, but, in the fourth quadrant, there  - 76 were 20 of these hollow, coiled processes, formed from the ectoderm of the radial canal.  In their development,  they have pushed out the subumbrellar wall, so that the inner layer of the tentacular process is formed from the ectoderm of the radial canal while the outer layer is formed from the ectoderm of the sub-timbre liar wall, Torrey has not noted the occurrence of these peculiar processes, but as all his specimens were damaged, it is possible that they were knocked off, As the specimen agrees so well wish '2orrey's description, it does not seem necessary to form a no* genus or species inasmuch as thox-e is only one specimen, at hand which may be a variety and as the structures may have been present in Torrey's specimens, Colour:- Manubrium and gonads-pale yellow. Mayer considex-3 it inadvisable to differentiate getterieally between rudimentary tentacles and developing tentacles, but as the specimen is quite mature, the small tentacles are unquestionably rudimentary. The presence of the tentacular processes would also prove a generic distinction, Sis tri out xon: - dan Diego, between San Diego and Monterey, California (Sorroy); 'Tod Inlet, Saanich Arm,  ^Jqinlly, E u ^ y ^ k  Segenbaur.  Genus OSHLIA, Poron and Lesuev-.i*. Obelia boreal is; Butting. Ooelia boreal is, Hutting, -Proc. Washington Aoatl. Sei., v p.174, plate 19, figs, 4,6.  1901.  - 77  -  Obella h o r n l l i .  Mayor, Medusae o f t h e W o r l d , r o l . 2 ,  flb3lli  POrtftill.  Praser,  O.Molean,  Wast C o a s t  Oballa boreal l a .  Praser,  0.McLean,  H y d r o i d s of t b a Tan.  p.150, gUtflbutlOB*-  plate 15, f l g . 4 9 .  Takutat,  Alaska,  1910.  Hydroids, p . 3 d , I.  1911.  Region,  1914.  (IuttingJ|  l a d e n Harbour, B u l l Harbour, C o l a e l e t ,  P.249,  Off  Maaaett,  San J u a n A r c h i p e l a g o , Crater).  Qfrallfa QQ^jWJLfljax-AAJU. MeOrady, O b a l l a QQttffiUB^fSlla.  MoGrady,  Gynao. C h a r l e s t o n H a r . , p . 9 5 ,  p b e j i a o o a m l e a u r a l 1^, T o r r e y , H y d r o i d s of t h e P a o i f l o p. Obolia e o a q l e a n r a l l a ,  56.  F r a a e r , West 0 o a 3 t H y d r o l d a , p . 3 8 .  San ^ r u a o i s o o Bay  Obolla corona,  2, p.14,  Torrey.  figs.  Mayer, Medusae of  O o e l i a ooro-j.a, P r a s e r ,  Dlstributioat-  5,6.  Publ  Zool.,  1904.  the l o r l d ,  rol.2, p.253.  * e s t Coast Hydroids, p . 3 6 ,  (Hydroias  Archipelago  (Torrey).  T o r r o y , U n i v e r s i t y of C a l i f o r n i a , TOI.  1911.  only).  QfreUa oorofla ObeXia o o r o n a ,  Soaat,  1302.  (Hydroids filatrlbutiont-  1858.  1910.  1911.  only).  San D i e g o , C a l i f o r n i a  (Torrey);  San Juan  (Praser).  Qfrttllft dloLQton^a_(Linnaeue ) . Sertui  i.o topta, L i n u a e u a .  Qi'sil-; d i c i o t o - ; . . ,  rincis,  S y s t e m a JJaturae,  Sd. 1 0 , p . 812,  B r i t i s h Hydro i d - . o o p h y t e e ,  plate 28, f i g .  1.  1868.  p.156,  1756.  1  - 76 Obelia dichotoma, Mayor, Medusae of the World, vol.2, p.246, plate SO, ttgtg  1-4. 1910.  Obelia dichotoma. Eraser, west; Coast; Hydroids, p.38,  1911.  Obelia dichotoma, Praaer, Hydroids of the Van. I. .Region, p,151, place 15, fig. SO,  1914. {Hydro id only).  Distribution:- Bremerton (Calkins); Sitka, 3erg Inlet, Orca, Alaska (Hutting); dan Pedro to Coronado Is., San Diege, Oalii'ornia, (lorrey); Alert Bay, 0..':t" Protection I., off ^:atia I., off Waldron I., Departure Bay, San Juan Archipelago (Praser).  Obeli3. duJJLa Hutting. Obelia dubia f Hutting, ?roe. Washington Acad. Sol,, vol.3, p.174, plate 20, fig.l.  1901.  Obelia dubiaf Mayer, Medusae of -one World, vol. 2, p. 248,  1910.  Obelia dubia, Praser, .Vest Coast Hydroids, p.36, plate 3, figs,3,4. 1911. Obelia dubia, Praser, Hydroids of the Tan. I. Region, p.151, plate 16, fig. 51.  191-i.  (Hydroid only).  Distribution;- Orca, Alaska (Hutting); Queen Charlotte Is., Snake I., Departure Bay, Dodds Harrows, Heck Pt., Horthuciberland Channel, Gabriola Pass, Ucluelet, San Juan Arohipelago, Priday Harbour (Prasar ). Que 11 a fragi!?. s Calkins. Obalia fragilis f Calkins, Proc. Boston Soc. Hat. Hist., vol. 28, p.355, nlate 3, figs.15-.15b; plate 5, fig.15c. 1899. Obelia fJXAi ilig. Mayer, Medus.iO of the World, vol.2, p. 252, 1910. Obelia fragiiis T Praser, West Coast Hydroids, p.39.  1911.  - Tf Oballa frag-llla. Prasor, Hydroida of Tan. I. Boglon, p.162, pinto 16, fig. 62,  1914.  (Hydrold o n l y ) . DlfltrH?"*; lflH«- Port Tovnsend  (Oalklnai.  Qfioilu gtifclflulata. jfftalirltt  UlnnMusJ.  KtttlQttl&lA. L i a n a e u s , System* l a t u r a a , od. 1 0 , p . 1 2 1 2 , 17*7.  Oballa g e n l o u l a t a . A l l a a n , *nnale and Mug. Mat. H i s t . , r o l . 13, p,372, Oballa ganlaalataf  ldt><».  l o r r o y . Hydro Ida of tarn P a c i f i c Coast, T O I . 1 , p.56,  OfatlU gafllflttlfltft,  aar. 5,  1902.  l o r r o y , HydroMa of San Dlogo, p . 1 5 ,  1904.  Oballa gOfllOttlaU, Mayor, tteduBao or tna World, T O l . 2 , p . 2 4 9 , 1 9 1 0 . QfrtUa KtBlOHlata, Praser, l e s t Ooa t Hydrolas, p . 3 9 , 1 9 1 1 . D l a t r l b u t l a n i - San Pranoiaoo, Q a t a l i n a I s . , Coronada I . , (Terrey).  .PiUtiJLa f.fb, U l a - O a l k l n a . Obalia g r a n l l l a T C a l k i n s , ? r o o . Boston 3 o c . Hat. H i s t . , p. 353, plate 3 , f i g s .  vol.28,  13-13«| p l e t e 6, f i g .  13d. 1899.  QPtlU KfftaUli.  Mayor, Msduaao of tho World, r o l . 2 , p . 2 6 2 , 1 9 1 0 .  Qbslla  Eraser, Wast Coast Hydroids, p . 3 9 .  ftr&illia.  1911.  Obalia g r a a l l l s T P r a s e r , Hydroids of 7an. I . Region, p . 1 5 2 , p l a t o 16, f i g . 53.  1914.  (Hydro id o n l y ) . D l a t r l b n t l o n t - Soow Ba;,, P o r t Towneend ( C a l k i n s ) { . San Jaan a r c h i p e l a g o . Port Townaand ( P r a s e r ) .  - 80 Obolla griffini Calkins. Obeiia griffini. Calkins, Proc. Boston Soc.Hat. Hist.,vol. 28, p.357, plate 4, figs. 18-18o, plate 6, fig. 18d, 18S9. Obeiia g r i f f i n i .  Mayer, Medusae of t h e World, v o l . 2 , p . 2 5 2 ,  Obeiia g r i f f i n i T  5 ' r a s e r , west Coast H y d r o i d s , p . 5 9 .  1911.  O.pelia g r i f f i n i ,  Fraser,  p.153,  H y d r o i d s of Van, I . l i e g i o n ,  p l a t e 16, f i g .  54.  1910.  1914.  (Hydro id e a l j }. p i s t r i b u t i o n : - P a g e t Sound ( C a l k i n s ) ; D e p a r t u r e Bay, Uclnelet, Harbour,  Dodds Harrows, G a b r i o l a P a s s , P o r l i e r P a s s , off  S u c i a I s . , P o r t l o w n s e n d , '.Vest S e a t t l e ,  Friday (Fraser).  JLiSl i ^,..1 -2j^4j.-|J^a ( P a l l a s ) . ft**^!*^*  1  ffnf<ffilllHfti  O b e i i a l o n g i ss inta,  Pallas,  Blanohna Uoophytorum, p . l i 9 ,  H i n c k s , H i s t . B r i t . . Hydro id S o o o h y t e s , P l a t e £7, 3 f i g s . ,  Obeiia  IMM£1MM1M&I  Clarke,  1766. p.154,  1858.  5.1aakaa H y d r o i d s , v o l . 1 , p . 2 1 2 ,  1876.  O b e i i a l o n g i s s ii,.a, Mayer, Medusae of fcae World* v o l . 2 , p . 255, 1910 O.PftULfc JjttCJUULl&&« F r a s e r , *'e*t Boast H y d r o i d s , p . Z 9 .  1911.  O b e i i a lon^i.gslaa., F r a s e r ,  p.153,  Hydroids of 7 a a . I . Bevion,  p l a t e 16, f i g .  55.  1914.  Specimens of t h i s s p e c i e s a r e ctuile ooianon in D e p a r t u r e Bay, d u r i n g t h e summer m o n t h s . D i s t r i b u t i o n * - Un&leska I C l a r k e j ; Banks I . , L a s q u e t l Hanoose Bay, Doods H a r r o w s , G a o r i o l a P u g s , S u c i a i s , , Harbour, San J u a n A r c h i p e l a g o , '..'est S e a t t l e , P o r t  I.,  Friday  Sawasend,  G r i f f i n Bay, Clayuquot Sound ( F r a s e r ) ; D e p a r t u r e Bay.  -  81 -  •OHUfr p n U t U « n t a t a Obalia multidantataf  ?raier,  Praser.  Hydro i d s of Tan. I . R e g i o n ,  plate 17, f i g .  56.  p.154,  1914.  (Hydroid o n l y ) . pi s t r i but i o n : - P n d a y Harbour  (Praser).  O b e l i a o l i c a t a Hinoks. Obalia p l i c a t a T  Hinoks, H i s t . p l a t e 30,  Obelia p i l o a t a .  Hutting,  fig.  B r i t i s h Hydroid Zoophytes, 1,  1868.  P r o o . Washington, Acad. S o i . ,  p.173,  p.159,  vol.3,  1901.  Obolla plioata T Calkins, Some Hydroids of Puget Sound, p.357, 1899. Obelia plioata, Nutting, Hydroids from Alaska and Puget Sound, p.741,  1899.  Obelia(?) piiouta,Mayer, Medusaeof the World, vol.2, p.256, 1910. Ooelia plioata,Praser, West Coast,Hydroids, p.39, 1911. Obelia Tolicata, Praser, Hydroids from Tan. I, Region., p.154, plate 17, fig. 57. 1914. Distribution:- Puget Sound (Hutting); Puget Sound (Calkins); Oroa, Alaska (Nutting); Departure Bay, San Juan Archipelago, Port Tovmsend  (Praser).  Obolia purpurea, Torrey. Obolia purpurea, Torrey, University of California, publ. Zool., vol. 6,  p.20, fig.6. 1909.  Obelia purpurea, Mayer, Medusae of the World, vol.2, p.494. 1910. Distribution:-(Torrey) San Diego, California.  -  •* -  Ofcalla •qrflBlM'l* Oalkias. Oaalla m r t n l t r l i .  Calkins, Proo. Boston 3oo. l a t . l i s t . , p.355|  plat* S, flga.  14-14b;  ••1.28,  plat* 6,  fig.l4s, 1899.  Ob»lla anmnlarl« r  ?ra»er, Wsst Coast Hydrolds, p.40, 1911.  Oballa m r a a l a r l i .  Praser, Hydnids of Tan. I. Region, p.156, p l a t s 17, f i g .  68.  1914.  (Hydrold only). p i s t r l b u t l o n t - 3oow Bay, Port Townsand (Calkins)| Kanaka Bay,  (Praser).  Oballa apaale«.(T) Ohalla aneoles (?), Bigelow, H.B., Proo. U.3. Hat. Has., rol.44, p. 34. 1913. Dlstrioution;- Dutch Harbour, Alaska (Bigelow).  Qballa epaolaa (?) Bsll disaster, 1 an. quadrant.  10 tentacles are present In each  There are 8 otooysts.  The gonads ars a- ths  distal snds of ths radial canals. Colour*- Manubrium and gonads, bright green. Distribution!- Dodds Harrows.  0 e n u s CLIT^A  L  amouroux.  Clvtla aUoaUatft (Oalklns). Qaaoanularla attanuata. Calkins, 3ome Hydrolds of Puget Sound, p. 350,  1899.  Olwtla attenuataT Praser, West Coast Hydrolds, p.34,  1911.  - 83 Clytia attenuata. Eraser, Hydroids of Van. I. fiegion, p. 142, plate 13, fig, 39,  1914.  (Hydroid only), Distribution;- Port Towns end, Soow Bay (Calkins) San Juan Archipelago  (Fraser.)  Clytia cylindrioa Agassiz. Clytia cylindrica T Agassiz, I-., Cont. Sat. Hist., U.S., vol. 4, p. 306.  1862.  Clytia evlindricaT Hutting, Hydroids of Woods Hole, p.342, 1901. Clytia cylindrioa, Fraser, Hydroids of Beaufort, p.358.  1912.  Olytia cylindrioa, Fraser, Hydroids of Van. I. Region, p.142, plate 13,  fig. 40.  1914.  (Hydroid only). Dis tributioni- Off Pt. Richardson, near Friday Harbour. (Fraser ). Clytia edward,si (Hutting). Oamuanularia gracilis. Calkins, Some Hydroids of Puget Sound, p. 350,  1899,  Campanularia edwardsi. Hutting, Hydroids of Y/oods Hole, p.346. 1901 Oanroanularia ed^ardsi, ?orrey, Hydroids of San Diego, p.11, 1904, Clytia edwardsi, Fraser, West Coast Hydroids, p.34, plate 3, fig*, 1, 2.  1911.  Clytia edwardsi, Fraser, Hydroids of Van. I. Rerion. p. 143. plate 13,  fig. 41,  1914.  Distribut ion;- Port Tovmsend (Calkins); San Diego (Torrey); very extensively distributed throughout the region; found at Banks I., China Hat, Lasqueti I., Hanoose Bay, several points  - 84 near and in Departure Bay, Berth of Gabriola I., Hortnumberland Channel, Dodds Harrows, Pylades Channel, Gabriola fass, Porlier Pass, Whaleboat Passage, Friday Harbour, San Juan Channel, Deer Harbour, Port Townsend (Fraser);  Departure Bay, Strait of Georgia,  great quantities in July.  Clytia hendersoni Torrey. Clytia hendersoni, Torrey, Hydroids of San Diego, p.16, Clytia hendersoni, Eraser, V.'est Coast Hydroids, p.35,  1904,  1911.  Distribut ion:- San Diego, California (Torrey).  Clvtia inconaoicua (Forbes).  Thaumantias i n o o n s p i c u a ,  F o r b e s , B r i t i s h Haked-oyed Medusae, p. 321.  thaumantias inoonspicua, \7right,  1848. Quart. Journ, Micr. S c . ,  p.221, 1862.  Oanroanularia inoonspicua, Calkins.,. Pu et Sound Hydroids, p. 349. 1899. Thaumantias inoonspicua, Fraser, West Coast Hydroids, p.40. 1911. Clytia inoonspicua, Fraser, Hydroids of Vs.n. I. Region, p.144, plate 13, fig. 42.  1914.  Distribution: - Puget Sound (Oallcins); Banks I., Departure B|ty# Whaleboat Passage, San Juan Archipelago (Fraser). Clytia .Johnston^ (Aider ). Oanrpanularia 4°Hnstoni f Alder, Annals and Hag. N.H., 2nd. ser., Ho. 18, p.359.  1856,  Clytia fiohnstoni, Clark, Alaskan Hydroids, p.212.  1876.  Oampanula,ria J ohns t onlTJBalkina, Hydroids of Puget Sound, p.348. 1899. Clytia bicophora, Torrey, Hydroids of the Pacific Coast, p.l. 1902.  - 85 Clytia .iohnstoai. Fraser, West Coast Hydroids, p.36.  1911,  Clytia johnstoni, Fraser, Hydroids of Van. I. Region, p.146, plate 14,  fig. 43.  1914.  Distr ibut ion:- Puget Sound (Calkins); North of Gabriola I., Gabriola Pass, (Frasor).  Clytia kincaida. (Hutting). Campanularia kincaidi. Hutting, Hydroids from Alaska, p.743. 1899. 0ampanularia kiucaidi, Fraser, '.Vest Coast Hydroids, p.31.  1911.  Clytia kincaidi, Fraser, Hydroids of Van. I. Region, p.146, plate 14, fig. 44.  1914.  (Hydroid only). Distribution: - Puget Sound (Hutting); Dodds Harro /s, Nanoose Bay, off Clarke Rook, Gabriola Pass, off Matia I., Friday Harbour (Fraser).  Clytia universitatis  Torrey.  Clytia universitatis, Torrey, University of California, Publ. Zool., vol.2 , p.19, figs. 12,13.  1904.  Clytia unLversitatis, Mayer, Medusae of the World, vol.2, p.265, 1910. Clytia universitatis, Fraser, Vest Coast Hydroids, p.36,  1911,  (Hydroid only). Distribut ion: -3-an Pedro Bay, California, San Diego Bay (Torrey ).  Genus PHIALIDIUM Leuokart. Phialidium discoida (Mayer). Oceania disooida T Mayer T Bull, Mus. Comp. Zool. at Harvard College* vol. 37, p.51. plate 20. figs. 53-55.  1900.  - 86 Phialidium disooida, Bigelow, H.B., Mem. Mus. Comp. 3ool. at Harvard College, vol.37, p.155, plates 6,38, 19 09.  P h i a l i d i u m d i s c o i d a , Mayer, Medusae of t h e Y/orld, v o l . 2 , p . £ 7 2 , plate 33, f i g s . 9-11.  1910.  D i s t r i b u t i o n : - Aeapulco H a r b o u r , Coast of Mexico  (Bigelowj.  P h i a l i d iuia 1 aa;:u,ittum ( A g a s s i z ] , Oceania lanrrulda, Agassiz, A.,  i n L. A g a s s i z ' s Qont. H a t .  U.3., vol.4, p.353,  1862.  O c e a n i a l a m c u i d a , A g a s s i z , A . , ITorth Amer. A c a l . , p . 7 0 , 94-102,  Hist.,  figs.  1665.  P h i a l i d i u m lan.guidum t Haeclcel, S y s t . d e r . Medusen, p . 1 8 8 , 1 8 7 9 . P h i a l i d i u m 1 an em i dual, Murbach and S h e a r e r , P r o c . Z o o l , London, v o l . 2 , p . 1 7 9 .  1903.  P h i a l i d i u m l o m a e , T o r r e y , U n i v e r s i t y of C a l i f o r n i a , v o l . 6,  p.22, fig.  8,  Soc.,  Publ.  Zool.,  1909.  Phialidium lanc;uidumtMayer, Medusae of the World, vol. 2, p.269, plate 33, figs.4-8; plats 54, fig.5, p.495, 1910. As noted in the description below of P. languidun, var. eresariumf there seem to he differences between the common Atlantic form, P.1 anguidum and the common Pacific form.  Yet  there are intergrading forms, such as P. lane.'uidumT Murho.ch and Shearer, and P. lomae, Torrey, which have oharactoristics common to both species and thus are united uo the older 3pecies. Distribution:-  Victoria Harbour, (Murbach and Shearer); San Diego, California (Torrey).  -  8 7  -  E h i a 1 jaium 1 angniduia, v a r ,  gregarlxun  Oceania gregarium, A g a s s i z , L . , Coat. Hat. H i s t . U . S . ,  (Agassiz).  vol.4,  p . 3 5 3 , 1862. Oceania gregaria, Agassiz, A., forth Amer, Aoal,, p.74. fig.103, 1865. Phialidium gregarium. Haeckel, Syst. der Medusen, p.188. 1879. Phialidium gregarium, Hurbach and Shearer, Proc. Zool. Sec. London, vol.2, p.179, plate 20, figs. 1,1a, 1903. Phialidium gregarium, Mayer, Medusae of the World, vol.2, p.27 2, 1910. These medusae are very coiamon in the waters of the Strait of Georgia, especially during the sumiaer months. The forms from the Pacific and those from the ^.ty lantic Qoast have always been classified as separate species, the former as P. gregarium and the latter as P. languidum. Of late, however, the correctness of this classification has been questioned.  To determine to what extent the two species  differed, specimens of both were examined, those from the Pacific collected alive, and those from the Atlantic, kindly sent by Dr. Huntsman of the Biological Station on the Atlantic Coast. Murbach and Shearer cite, as a difference between the two species, the shape of the stomach.  This is rather mis-  leading for specimens have been found of both species, the shape of whose stomachs show a great variation, caused, no doubt, by the contraction of the bell, which variations not only correspond with Marbach and 3hearer's description but give the reverse result. .Regarding the number of tentacles, the Atlantic forms possess, on an average, 32 tentacles, whereas the Pacific forms have 64, a difference which cannot be caused by any  - 88 difference in the state of developaent for all the forms are Of approximately the same bell diameter, 12 mm. There is a decided contrast bet7een the lips of the tvo species.  Those of the Atlantic are sim>le or reourvod, while  those of the Pacific are lonper and complexly folded or fringed. There is a difference, also in the namber of otocysts. The Atlantic specimens, in evory case, showed a greater proportion of 2 otocysts between each successive pair of tentacles, the average for 15 specimens being 20 spaces between tentacles containing 2 otocysts; and 1 spaoe containing S. The Pacific forms, on the other hand, showed a greater proportion of 1 otoeyst between each successive pair of tantaoles, the proportion being 29.5 t 3.5. Moreover, the gelatinous suostance of the bell is much greater, that is, much thicker, on the aboral surface in the Pacific forms than in the Atlantic It is interesting to note that, of aoout 100 specimens of the Pacific form, collected at Friday Harbour, 20, which were examined, showed a predominance of 2 otooysts between successive pairs of tentacles, while several others possessed more spaces with one otooyst, the proportion being 26» 18.  In all other respects, these specimens are simi-  lar to those collected in Canadian waters. These latter specimens, thus seem to be intergrading forms Between the species from the two coasts.  For this  reason, that of intergradation of forms, it would seem advisable to consider the Pucifio form of Phialidlum a variety of the Atlantic form, P.laneruidium since the latter has precedence over P. grovarium.  - 39 Distribution:- Gulf of Georgia (Agassis)| Puget Sound, Victoria Harbour, (Murbach and Shearer)? Bull Harbour, Five Finger I., Departure Bay, Horth of Entrance I., Northumberland Channel, Round I., Friday Harbour.  Genus PHLnLIUM Kaeclcel. Phial iuia duodecimal is (A. Agassiz). >  Eueheilota. duodecimal is t Agassis, A., in L. Agassiz s Oont. Hat, Hist. U.S., vol.4, p.353, 1862. S u c i i e i l o t a duodecimal !.§, A g a s s i z , A,, l o r t h Amer. A c a l . , p . 7 5 , figs.  106, 107, 107a.  1865.  P h i a l i u m duodecimal i s , H a e c k e l , S y s t . der Medusen, p . 1 3 0 . 1879, P h i a l i u m duodecimal i s , B i g e l o w , II. B . , Mem. Mus. Cotip. Z o o l . ,  at  Harvard C o l l e g e , v o l . 3 7 , p . 1 5 4 , p l a t e 5 8 , fig*.  4, 5.  1909.  Sucheilota duodecimalis, Mayer, Medusae of the World, vol,2, p.283, plate 36, fig. 6;  plate 37, figs. 1,2, 1910.  Bigelow states "It is best to retain Haeckel's genus as distinguished from £uohellotaT inasmuch as it is separated from the numerous species with eight otocysts (ihioheilota), not only by the numoer of thes3 organs, but also by the limited number of developed tentacles (four radial) and by the extreme development of the gonads". Distribution:-  Acapulco Harbour, Coast of Mexico (Bigelow). Genus_ PHIAL0P3IS. Torray.  Phlalopsis dierensis Torrey. Phialopsis dief?ensis, Torrey, University of California, Publ. Zool., vol.6, p.23, fig. 9.  1909.  • 90 PfriMi^t* *!•»«.*•- Mayer, Medusae of the World, vol. 2, p.496, 1910. B l m t r l b u t l e u i - San D i e g o , C a l i f o r n i a ,  (Torrey.)  Genus PHlALDOIOg Maas. fhlaittQlBJi 09M*liu.*igolo»« P h i a l n a i u i aomata. Blgelow, H . 8 . , Hem. Mus. Co«p. i o o l . a t College,  TO1,37,  p.168, p l a t e 6, f i g s .  p l a t e 6, f i g . 9 | p l a t e 9 7 , f i g s . 8 , 1 0 , 1 2 .  Harrard 6,T| 1909,  P h l a l u a i ™ a<mataT Mayer, Medusae Of the World, r o l . 2 , p . 2 T 6 , 1 9 1 0 . D l s t r l b u t l o n i - AoapulM Harbour, Coast of Mexloo,  fBlgelowi.  Genus ggOBSlIiQIii MoOrady, ^uoha^lotA »f*-pf*P h i a l i M >ik«rlTtflrf«v.  (Torrey).  U n i v e r s i t y of C a l i f o r n i a , P u b l .  TOl,6, p . 2 1 , f l g . T .  2ool.,  1909.  » » ^ * i l * t t bakarl T Mayer, Medusae of the World, r o l . 2 , p . 4 9 5 . 1 9 1 0 . Torrey d e c l a r e s that "the i n t e r r a d i a l p o s i t i o n of t h e s t a t e o y s t s of the young p r e v e n t s an e a s y t r a n s i t i o n t o BttQhaiioLa' r but Mayer o o n s l d e r s i t a form of  SUQhflUoU.  as i t " r e c a l l s t h e e o n d i t i o n s e e n in B n a h a i l e t a d i p l e u r o n , fromthe A t l a n t i c Coast", BlAgMlM - CAYtU feaJtOfl Torrey. D i s t r i b u t i o n . : - Oeeane, San Diego,  (Torrey).  Genus J g l l s U MoOrady. fitflma laTu^a i « n t «  and Mayer.  K l t U a l t Y l f a , A g a s s i s , A . , and Mayer, B u l l . Mus. Cojsp. Z o o l . , a t Harvard C o l l e g e , v o l . 3 2 , p . 1 6 5 , p l a t e 9 , f i g e . 50, 51,  1999.  - 91 Sutiina l e v u k a , B i g e l o w , H . B . , Mem. Mus. Comp. Z o o l , a t Harrard College, v o l , 3 7 , p . 1 6 5 , p l a t e 5, f i g s . 2 , 3 } 35, f i g * . 1,2.  plate  1909.  Sutlma l e v u k a , Mayer, Medusae of t h e World, v o l . 2 , p . 3 0 1 , J i s t r I t a u t i o n : - Aoapulco H a r b o u r , C o a s t of Mexico.  1910.  (Bigelow).  Genus ->UT- IMALPri53 Haeclcol. ^utimalphes„ b,rQJOAX Eutimalphes brownei.  (part),  lorrey.  T o r r e y , U n i v e r s i t y of  California,  Publ. Zool., vol.6, p.25, fig.10,  1909.  Butima b r o w n e i , Mayer, Medusae of t h e 'world, v o l . 2 , p . 4 9 5 ,  1910.  10 s p e c i m e n s out oi t h e 90 examined by T o r r e y p o s s e s s m a r g i n a l c i r r i 'between t h e t e n t a c l e s . classification,  Following Haeckel's  t h e s e 10 would be c l a s s e d a s ggj imal-oh.es  brovrnei, t h e o t h e r 80 as ffu,t o a i n a b .-o wn e i .  Ganua^JTOIIIIjA H a r t l a u b . £JH t o a J T,fif^ r o ? a i U But imalphe s brown&i t  (2orrey).  ( p a r t ) , T o r r e y , U n i v e r s i t y of  California  Publ. Zool., v o l . 6 , p.25, fig.10, Butima b r o w n e i t  ( p a r t ) , Mayer, Medusae of t h e World, p. 495.  vol,2,  1910.  Those 80 s p e c i m e n s , out of t h e 90 examined, and by T o r r e y as .5utimal-oh.es  1909.  classified  brovrnei and by Mayer a s Sutima  brownei T h a v i n g no o i r i i come u n d e r t h e genus B u t o n i n a H a r t laub.  As t h e y p o s s e s s more t h ^ n f o u r t e n t a c l e s ,  i n c l u d e d under Butima H a e c k e l . see S y s t e m a t i c  they a r e n o t  For e x p l a n a t i o n of  genera,  Discussion.  Distribution:-  San Diego, C a l i f o r n i a ,  (Torrey).  - 92 ant onIna indiaani (Romanesj. TiaroTjais indicans, Romanes, Journ, Llnnean Soo. London, vol, 12, p.525.  1876.  jfatonina socialls, Hartlaub, tfissen, Meeresuntersuoh. Kommls #t Meere Kiel, Helgoland, Naue Folge, Bd.2, p. 506, taf.22, fign. 1,3,4,6,7; taf.20, fign.19,20.  1897.  JSutoaina indicans, Hartlaub, V/issen, Moeresuntersuch. Kommis., Meere Kiel, Helgoland, Heue Folge, Bd. 2, p. 507.  1097.  Butiiniuni social is, Mayer, Medusae of the World, vol.2, p.306. 1910. .Butonina indicans, Bigelow, H. 3., Proe. U.S. Hat. Mus., vol. 44, p, 34.  1913,  numerous specimens are included in the coll action, Varying, in siae, from 8 mm. bell dianeter, to 4 mm. belldiameter.  In the large specimens, the tentacles number  40 - 45 per quadrant. Following Bigelow, the two speeies of a t o n i n g , &. indicans, and &? social is are combined as £. indicans, as there seems to be little doubt but what the two speoiec are identical. Distribut ion:- Dutch Harbour (Bigelowj; Bull Harbour, Departure Bay (March-October), Off Snake Island.  butonina scintillans (Bigelow). Butimalphes scint illans, Bigslov;, II.B., Mem. Mus. Comp. Zool., at Harvard College, vol.37, p. 167, plate 5, figs, 8,9; plate 37, fig.11. 1909,  - 93 Butimium aointillan3t Mayer, Medusae of the World, vol.2f p.306, 1910, As these specimens, according to BigelOvT, possess no cirri and from 29 to 36 tentacles, unquestionably they should be placed under the genus Eutonina Hartlaub. Distribut ion;- Acapulco Harbour, Coast of Mexico. (Bigelow). Genus I^IREHS Jsohscholtz. gjLjtgflg modus if 8X£i Bigelow. Direneraedusifera,,Bigelov/, H.B., k©m, Mus. Oomp. -2ool, at Harvard College, vol.37, p.161, plate 37, figs,1-8 19 09. JEirene medusifera, Mayer, Medusae of the World, vol.2, p,313, 1910. pigtribut ion;- Common in Acapulco Harbour, Coast of Mexico. {Bigelow). .Sirene mollj.s Torrey. Irene mollisf Torrey, University of California Publ. Zool., vol. 6, p.26, fi£.11,  1909.  Mayer includes Irene mollis in the genus Eirene vlridula {vol.2, p.311, 1910), but as there is a difference in the number of tentacles, number of statocysts and in the length of the gonads, there seems to be ground for a specific difference. Distribut ion;- San Diego, California. (Torrey).  Family AaQUOHIPA3 aschscholtz. Genus_0Cl'0CAxT^4r Haeckel. Octocanna. polynema Haeckel. Octocanna polynema, Haeoliel, Syst. der Medusen, p.214. 1879.  - 94 Octooanna polynemaT Bigelow, H,B,, Mem, Mus. Gomp. Zool. at Harvard College, vol,37, p.169, plate 6, figa. 6, 10; plate 38, figs. 1-4, 1909. Ootpcanna polynema, Mayer, Medusae of the World, vol, 2, p.320. 1910. Dis o r j b u t i o n t - Acapuloo Harbour, Coast of Mexico.  (Bigelow)  Genus A.^QUOIiBA P e r o n and L e s u e u r . Aequorea aequorea (Forskal). Medusa- aeauorea. Forskal, Descriptiones animalium, Hauniae, p. 110, 1775. Aeauorea forskalea, Peron and Lesueur, Ann. Mus. Hist. Hat., tome 14, p,336. Orematostoma flava, Agassiz, ~.,  1809,  in L, Agassia's Cont, Hat, Hist,,  U.S., vol. 4, p.360.  1862.  Orematostoma flava, Agassiz, A., Horth Amer, Acal. p. 108, fig.159, 1865. Aequorea o i l i a t a ,  Eschsohoitz, f i g , 1,  Aequorea c i l i a t a T  9,  1829.  Agassiz, L . , p , 359,  Sy§fc« der A c a l , p . 1 0 9 , p l a t e  Oont. H a t , H i s t . U . S . , v o l ,  4,  1862.  Aequorea c i i i a t a , A g a s s i z , A . , Eofeth Amer. A c a l . p . 1 0 9 .  1865.  Uosonema v i c t o r i a T M u r b a o h and S h e a r e r , Annals and Mag, H a t , s e r . 7, v o l . 9 , p . 7 2 .  Hist,,  1902.  Mesonema v i o t o r i a T H u r b a c h and S h e a r e r , P r o c . Z o o l . Soc. London, v o l , 2, p . 1 8 0 , p l a t e 1 9 , f i g s . fig.  2,  Aequorea f o r s k a l e a r M a y e r r  1,2; p l a t e  22,  1903. Medusae of t h e World, v o l . 2 , p . 3 2 5 ,  p l a t e 42, f i g s . 1 - 6 ,  p l a t e 43, f i g . 8 .  1910.  95 Aequorea aeouorea. Bigelow, H.3., Proc. U.S. Nat. Hus. vol. 44, p. 38.  1913.  Aequorea aeuuorea is perhaps the commonest medusa in the Strait of Georgia.  It is found in great numbers throughout the  whole year. The bell diameter  of the large specimens in the collection  averages about 35 mm., bell diameter; 25 mm., bell he i flit. number of tentacles, including biilbs is 120.  The  The numbsr of  radial canals totals 60. Disti'i'uu o ion;- Northwest Coast of North America, Lat, 41° to 51° North (Sschscholtz); Gulf of Georgia, Straits of Puca (A. Agassiz); Victoria Harbour, Ssquiroalt Harbour, Pleasant Beach (Murbach and Shearer);  Dutch Harbour, Union Bay, Friday  Harbour, Puget Sound (ligftlov] ; Strait of Georgia.  ^equorea coerulescens (Brandt), Mesonema (Zygodactyla) coerulescens, Brandt, Mem. Acad, Imp, Sci. St. Petersbourg, ser, 6, Sci, Math, et.Nat., tome 4, p.360, plate 5, 1838. Zy^odactyla coerulescens, Agassiz, A,, North Amer. Acal., P.108, 1865. Aequorea coerulesc.en.s,, Torrey, University of California, Publ.Zool., vol. 6, 170.2, p.23,  1909.  Aequorea coerulescens, Mayer, Medusae of the world, vol. 2, p.326,329.  1910.  Sis tri but ion:- 1600 miles west of San Diego (i'&ertens ) ; Entrance of Straits of i?uca {A,Agassiz); Unalaska Island (Torrey); 3an Diego (Torrey).  -16  •  A»ouoroa rupoaa  (lutting).  gfgpanpl^pa r u r o s a . l u t t i n g , Harriman Hydro i d s , p . 1 7 6 , 1 9 0 1 . Oamnannllna r n g o s a r P r a s e r , West Coast Hydroids, p . 4 4 , 1 9 1 1 . OaMPiinlina rngoaa. P r a s e r , Hydroids of Tan. I . Region, p . 1 5 7 , plate 17, f i g .  61,  1914.  As tn« medusae of Campannllna forsxajiaa, have been g i v e n the name Aeouorea aeouorea,  i t seems n e c e s s a r y t o c a l l  the  medusae of the hydroid, Qaa,pa£UUaft ru,fiQBft,Aequoroa rugOB*, I t s r e l a t i o n s h i p to the oommon ^equorea of the c o a s t , .A.. aequorea i s not known. (Hydroid o n l y ) . pistributioat- Juneau, Alaska (Hutting); West Seattle (Praser).  __gauiiy QhludlU.'J,  3ro-.7uo U o n s . o u . )  Genus LiLJ3ii^gyiSI Bigelow. jjpnretiaas ^''"P^fi Bigelow. gueretmus t y p u s , 3 i g e l o w , H.D., P r o c . U . S . , Hat. Mas., v o l . 4 9 , p.401, plate 59.  1915.  S-peretmus t y p u s t B i g e l o w , H . B . , Report Cart, A r i t i o Bxped., T I U , part H, p . 9 .  1920.  In the c o l l e c t ion are s e v e r a l specimens of t h i s varying,  vol.  species,  in s i z e , from 5 mm. to 45 mm., b e l l d i a m e t e r , a l l of  which correspond e x a c t l y w i t h Bigelow*s d e s c r i p t i o n . The c e n t r i p e t a l c a n a l s agree in 2 s p e c i m e n s , numbering 4, 4 , 4 , 5 , per quadrant and in a l l the remaining specimens, there i s a v a r i a t i o n i n t h e number to a quadrant from 4 t o 6,  - 97 In 3 specimens, there were 6 centripetal canals in each quadrant. Bigelow describes his type specimen as possessing 4, 4, 4 t 5 per quadrant. Bigelow states that "the total number of tentacles is 107, i.e., 28, 22, 24, and 29 in each quadrant, besides the four radials, of various sizes, and evidently of various agei".  In the specimens, have described, the tentacles  varied similarly in each quadrant.  In the smallest specimens,  there were, to a quadrant, 4 larg3 tentacles, situated some distance up from the bell margin, 4 smaller tentacles, situated nearer the bell margin, and at the bell margin, 15-18 3mall tentacles.  In the largest specimen, the number of tentacles,  in positions similar to tnose just enumerated in the smallest was 9, 15, 45, respectively. 2!he otocysts numbared roughly one betv/een each successive pair of tentacles. Colour:-  In the living specimens, the manubrium, gonads,  and tentacles are a delioatn j^iuk, ?7hile the tentacle knobs are a deep pink.  In the preserved specimens, the manubrium,  gonads and tentacles are a pal a yellow, ftizt.r jb.~t jq :a; - 2 miles Or'f Mary I., Southern Alaska, 1905, (?) Port Clarence, Alaska, 1913, (Bigelow);  Off Snake I.,  Departure Bay, Northumberland Channel, Dodds Narrows, ^'od Inlet, 100 - 9 f.  Gossfta.,b.raphymera, Bigelow, H.B., Mem. Mus, Comp. Zool. et Harvard College, vol.37, p.103, plate 30, figs.1-10,1909.  - 98 Gossea b r a e h y i n e r a , Mayer, Medusae of t h e World, v o l . 2 , p . 3 6 8 , 1910. D i s t r i b u t i o n ; - Acapulco I l a r b o u r , Coast of Mexico,  (Bigalow).  (xenus GONIOivEMUS A. A g a s s i z . GGaioaemus a a - a s s i z i i l a r ' o a o h and S h e a r e r . Gpniotieraus a r a s s i z i i , , Murbach and S h e a r e r , Ann. and Mag, N a t . Hist.,s«r.  7, v o l . 9 , p . 7 2 .  1902.  Gonioneraus a g a s s i z i i , Murbach and S h e a r e r , P r o c , 2 o o l . S o c . London, v o l . 2 , p.3.85, p l a t e 2 1 , f i g o . 1 - 3 ; p l a t e 22, fig.3,  1903.  Gonionemus afiftsaiz 1.JL, flayer. Medusae of t h e w o r l d , v o l . 2 , p . 3 4 6 , 1910. S i s . r i b u t l o n ; - Found In a s m a l l s a l t l a k e a t U n a l a s k a , A l e u t i a n I s . {Murbach and S h e a r e r ) . jjrgnjLo.nemus vextgjjj., gonionemus, v a r t e n s , A r c s s i z ,  i.,  197 - 2 0 1 .  .  Agassiz.  in L. A g a s s i z ' s Uont. S a t .  U.S. v o l . 4, p.350. Gonionemus^ v e r t e n s , A g a s s i z , a . ,  A  Hist.  1862.  S o r t h Amer. A c a l . , p . 1 2 8,  figs.  1866.  Gonionoxaiis v e r t ens,, Murbach and linear e r , P r o o . Z o o l . S o c . London, v o l . 2, p . 1 3 3 .  1903.  Gonionemus v e r t e n s , B i g e l o w , H. 3 . , Mem. l u s , Comp. Z o o l . a t H a r vard College, vol. 37, p . 1 0 6 .  1909.  Gonionemus v e r t e n s , Mayer, Medusae of tho World, v o l . 2, p . 3 4 3 , 1910. Shis species is common aiiong the sea weed along the Strait of Georgia. Distribution:- Gulf of Georgia (A. A.^assiz); Victoria Harbour, Ma,tsmets Bay, Puget Sound (Murbach and Ohearer)} Ballenac I.,  »»»ajrfcmj» Bay, **4«e I., U u « I., Oaraale Polat,  ' " " - **«"»•""*«P t j r o h a f r a . t r l a POlaffra  >t  M  h^.trU  Allaaa  » a i ^ i a . A l i » a a , Hydrosoa, l a l o r e ' s n a r r a t i v e o f Voyage Velar Sea, In H,M.jHeXi *ad PlaaoTaryy • o l . 2 , p.290, 2 f i g s . ,  1873.  gtyahaaaatgla nolariaf Mayer, Medusae of the iorla.  TOI.2,  p.872, 1910.  ya-»aha«a«t»la nolirli. Blgelon, H. B., Proo, 0.3. lat. Mas., Vol. 44, p.41.  1913.  •BiuttrlfruUQB'- Boring SQa ( B l e o l o w ) .  Genus PEQPit-OygWA Cegenbaar. Rhopalonajia Ytflt-tla Gagonbaur. Btl  * 1 T t l " l H I Tfafilrtoi  Gagonbaur, Z e i t , fur t r i s e o n . Z o o l . ,  Bd.8,  P.251, t a f . 9 , fign. 1-5. 1856. BhlPoiflBlBa Toil o i l * , B l g e l o w , H . B . , Man.Mas. Ccmp. Z o o l . a t Hnrrard Collage,  TOI.37,  plato 45, f l g . l l .  p.129, plcto 2 , f i g . 8 ; 1909.  Mlinpalaaajaa, T l l a t l W i Mayer, Medusae o f the 1'orld, v o l . 2 , D l a t r l f r n t l o n t - Off Ooasts of Lower C a l i f o r n i a ,  p.378.1910.  Mexico,  Salrador and Guatemala ( B i g e l o w ) .  Spans ,0ja^QBOHR|ff/  Tanhoffon.  t w i e m a T Haas, Mea.Mns. Ooap. Z o o l . a t Harrard O o l l o g o , TOl.25, p , I 2 , o a f , 3 , f i g n . 1 - 3 . 1 8 9 7 ,  - 100 Golobonema typioupi, Haas, Craspedoten Medusen der Sihoga Exped., Monog. JO. p.55, taf, 10, fign.62-65,  1905.  Hoinoeonema typicum, Mayer, Medusae of the World, vol.2, p.385, 1910. Oolobonefcia t y p j c u i a , B i g e l o w , H . B . , P r o c . U . S . H a t . B u s . , v o l , 4 4 , p. 46.  1915.  D i s t r i c t l o i n - P a c i f i c Coast of C e n t r a l America  (Haas).  Genus PiUTlJA0H0G0,|T. Maas. P an taj^Qj^o^_h_aojc 1;1 XI H a a s . Pantaohogon h a e c k l i i , Maas, Ergeb, der P l a n k t o n E x p e d . , B&« 2, K.o,p. 17, t a f . l ,  fig.  2,  1893.  Paatacliog;on h a e o k l i i , Mayer, Medusae of t h e World, v o l . 2 , p . 3 8 9 , 1910. Pantacho^on h a e c k l i i , Bigelot/, H.B., P r o c . U . S . Kat. Hus., v o l . 4 4 , p . 44, p l u t e 3,  figs.4-8,  D i s t r i b u t i o , p t - B e r i n g Sea, Unalaslca I .  1913.  (Bigelow),  Genus ClQSSQgA Vanhoffen. Croseota bru.au.ea Vanhoffen, vac. no rv a pi a Vanhoffen. Crossota norveala, Vanhoffen, 0raspedoten Medusen, Wissen, lirgeb. deutschen Tiefsee iixped. , vol.j;, p. 75.  1902.  Crossota brunnea, (Part j.Blgolo*-. H.B., A-am.Mus.Comp.^ool. at Harvard College, vol.37, p.135,  1909.  Oroasota norvee^a, Mayer, tiedusae of the World, vol.2, p.396. 1910, Oroasota brunnea, Vanhoffen, var. norvegia, Bigelow, H.B., Proc. U.S. Nat. Mus. vol.44, p.40. 1913. Distribution;- Albatross Stations - 4758, 4759, 4769 and Bering Sea (Bigelow),  - 101 -  grtiiot* pflaaaQul>ti Bigeiow. Orossota p«dnnaulata r  Bigeiow, H.B., P r o o . U . S . l a t . Mao., v o l . 4 4 , p. 51, plate 3 , f i g .  D l s t r l p u t i o n t - 46* 26* I . ,  124* 26* V. ( J u s t l o r t h Of  the Columbia H i r e r ,  Genus  IS, 1913.  AGLAURA  (Bigeiov).  Peron and L o s a o i r ,  AglftUra hamlatoma. Peron and Lesueur. Aglaura hemistOL.a t Peron and Lesueur, Annals Kus. H i s t . Hat. P a r i s , tome. 1 4 , p . 3 5 1 .  1809.  Aglaura priamatioa T Maas, U«m. Mas. Comp. 2 o o l , at HarTard C o l l e g e , Tol. 23, p.24, taf.  2, f l g a . 4 , 5 .  1897.  Aglanra hamlatamaT B i g e l o w , H . B . , Mem. Mas. Comp. Z o o l . at Harvard C o l l e g e , TOl.37, p . 1 1 9 , p l a t e 2 , f i g . 6 ,  1909.  Aglanra, ^nmistoma, Mayer, Medusae of t h e World, r o l . 2 , p . 3 9 8 , plate 4 6 , f i g s . 4 , 5 | p l a t e 4 9 , f i g s . 3 - 7 | p l a t e 50, fig. Aglanra h t o l i t o m a , f a r .  11.  1910.  "jrlBffiftUq&". Mayer, Madusae Of the World, TOl.2, p.400.  1910.  D i s t r i b u t i o n ! - Culf of Panama (Maas)t Off the west CoastOf Lower C a l i f o r n i a , Off the Entranoe t o the Culf of  Oalifornia,  Off the Coast of Mexioo and Centsal America ( B i g e l o w ) .  Genus AGLAHTHA Haeofcol. Aglantha dJKltalfl  (Muller).  Medusa d i g i t a l * , . Muller, ° . F . , Prodoom. ^ o o l . Dan., p . 2 3 3 . Ho.2824, 1786. Medusa dlcitale, Pabrioius, Pauna Grinlandioa, p.36b. Ho.361. 1780.  - 102 Trachynema digitale, Agassiz, A., Horth Amor. Aoal. p.55.  1865.  Aglantha d^italig, Haeokel, Syst. der Medusen, p.272, taf. 16, fign. 5, 6.  1879.  Aglantha dlftitale, Mayer, Medusae, of the world, vol.2, p,402,4&4, p l a t e 4 9 , f i g s .  2, 2 ' ,  1910.  A g l a n t h a d i g i t a l e , Bigelov/, H . B . , P r o c . U . S . S 6 t . Mus., v o l . ^ 4 , p.43,  1913.  Aglantha digitale, Bigelow, H.3., Eeport Can. Arctic Exped., vol. Till, part H.  p. 10.  1920.  The collection includes about 150 specimens varying in size form 1.5 to 10 mm. in bell diameter and form 2.5 to 14 mm. in bell height.  In all of the.se, however, the tentacles have been  broken off close to the base so that only knobs are left. in the larger individuals, numbered from 50 - 80.  These  It was im-  possible to make out the otocysts in the preserved specimens, but, in one specimen examined alive, these numbered 1G to a quadrant. Mayer has described a specimen about twice the size of the largest in this collection and it possessed from 80 to 100 tentacles and 4 lithocysts.  Another individual, he states, possessed  as many as 8 lithocysts.  Biggiow also records specimens possess-  ing tentacles from 68 to 124 in number but with only 8 otocysts at the most. Otherwise, the specimens correspond with Mayer*s description. Distribution;- Kamtehatka (Hertens); Galiano I., Gulf of Georgia (A. Agassiz); Albatross Stations - 4758, 4759, 4760, Dutch Harbour, 4762, Bering Sea, 4785,4793, 4797. (Bigelow); Station a 21a, b, c, Lat. 68° 30* K,, Long 166° 32'W., Off Coopor I.,  - 108 Alaska ( B l g e l o w ) i  2 a s t of Hewcastlo I . , Departure Biij, B . 2 . of  *iYe Finger I . , Horth of Sntranca X., Off Barry P o i n t , Tod Inl .-,t.  Aglantha d i g i t a l * Haeokel, Tar. JjLfcgrjBt&dJA Bigelow. Aglantha d l e l t a l e . Tar.  Utonafldla.  Bigelow, H, B . , Han. HUB.  Gomp. Zool, a t Harrard C o l l a g e , p . 1 2 2 , p l a t e 29, f i g s .  4-10.  vol.37,  1909.  D l a t r l b u t l o n t - At 3n-ranoe to Gulf of Panama, Off Coast of Guatemala, Off Coast of S a l v a d o r , Off Coaat of Nicaragua (Bigelow).  (TUgjftaifcft yroPoaoXf-flr. (Haas). Hal lour turn p r o b o s a i f er f Haas,  M  em. lius. Comp. Zool. at Harrard  College, vol.23, p.19,  taf.  2, f i g s .  5-7 1897,  Malloartnm (? ) j,glantha ( ? ) pro frosoU e r , Mayer, Medusae of World, v o l . l , p . 2 0 9 . D i s t r i b u t i o n ; - Gulf of Panama.  the  1910.  (Maas).  Genus AM?H0G0HA Browne, horona a o s t e l n i  (Vanhoffen).  Pentaohor:on a p B t e i n i , Vanhoffen, Wiss. Ergeb. der deutsohen Exped., Bd. 3 , p . 6 5 , t a f . 1 0 , f i g . 1 8 , fig. ^raplio.-ona a p s t o i n i .  28,  Tiefsea taf.11,  1902.  Bror/ne, Fauna and Geography Of the Uuldivo and Laocadive A r c h i p e l a g o e s , v o l . 2 , p . 7 4 0 , p l a t e 5», f i g . 5 ) p l a t e 55, f i g . 5 { plate 56, f i g . I f 57, f i g s . 1 0 - 1 5 ,  1904.  plate  •a-mphORona a p s t e i n i ,  104  Bigelow,  B.H.,  vard College, 1,2;  Mem, Mus. Comp. Z o o l . a t vol.57, p.126,  p l a t e 34,  figs.12-15,  plate plate  2,  Har-  figs,  45,  fig.10,  1909. Distri'put i o n ; - Acapulco Harbour,  Coast  of  Mexico.  (Bigelow).  F a m i l y HAL1CRKASIDAB. Genus HALI0BS±.B Fewlces. H a l i o r e a s p a p i l l o s'.im Van h o i ' f e n , Hal i c r e a s p a p i l l o s u m ,  Vanhoffen, exped«, taf.  Halipreas papillosum,.  Wissen,  3d,  11,  3, Lfg.l,  fig,  Bigelow,  Srgeb.  30.  deutschen  p,68,  Tiefsee  taf.9,  fign.7,8;  1902.  H . 3 . , Mem. Mus. Comp. Z o o l .  vard College, v o l . 37, p.138, p l a t e 3; plate 5, Halioreas papillosum,  8,  33, f i g s .  10,  Mayer,  11,  8,9;  plate  at 3,  34,  Harfig.  figs.1-3,  1909.  Medusae of  the  Aorld,  vol.2,  p.391. 1910.  Halioreas papillosumT  3igelow, p.  52.  11.3,, P r o c . U . 3 . S a t .  of P a n a m a ,  B e r i n g Sea  Hartlaub,  (Hartlaub).  Meduses,  i n Due d ' O r l e a n s  O c e a n c g r a p l i i q u e d a n s l a Mer du p. Botrynema e l l i n o r a e ,  (Bigelow),  3_BQgHTH5MA B rowne .  Botryneraa e l l i n o r a e . Alloionema e l l i n o r a e ,  vol,44,  1913.  D i s t r i b u t i o n : - "..est C o a s t Ge n u  Mus.,  8, p l a t e  76, f i g s .  3,4,6.  Bigelow H.B, P r o c . U.S. H a t . p.53,  plate  Distribution;- Albatross  4, f i g s .  Stations  1-4.  Crosiere  Gronland, 1909.  Mus.  vol.44,  1913.  - 4760-Bering Sea.  (Bigelow).  -  105  -  ?anlly S8BIQHDAB Genus LIBIOPE Lesson. Liriope indica Bigelow. LirioT3e indioaT Bigelow, H.B., Bull, Mus. Coop. Zool. at Harvard College, vol.39, p.258, plate 5, figs. 17,18. 1904. Liriope hvallna. (immature?),Agas8iz, A., and Mayer, Bull. Mus. Comp. Zool. at Harvard Colloge, vol.32, p.166, plate 9, fig. 3 2 . 1899. Liriope  i n d i o a . Mayar, Medusae of fig.  ,  279.  t h e V/orld, v o l . 2 , p . 4 2 1 .  text,  1910.  Distribution;- H.lat. 9° 57*, W.long. 137° 47* (Agassi* and Mayer).  Lirjopo Ger.vonia r o s a c e a , .  Sschscholtz, fig.  Liriope  rosacea,  2.  Zeit,  Acal», p . 8 9 ,  taf.  11,  fur Wissan. Z o o l . ,  Bd. 8 #  1856.  Maas, Mem. l i u s . Gomp. Z o o l . a t vol.23, Ho.l,  Liriope rosacea,  Syst.der  1829.  Gegenbaur, p.257.  Liriopo rosacea,  rosacea,(Eschecholts).  p.26,  Mayor, Medusae of plate 52, fig, 1.  taf.3,  Harvard C o l l e g e ,  figs.7,8.  1897.  tlie V/orld, v o l . 2 , p . 4 1 7 . 1910.  Distribution;- West Coast of Horth And South America (Maas).  Liriope totra-phylla (Chanisso et Eysenhardt ). Gervoixia tetraphyllaT Chamisso, A # , et Sysennardt, C.G., Fasc, 2, Acad. Caes, Leop. Kova Acta, vol. 10, p.357, plate 27, fig. 2, 1821. LirioiDB tetraphylla,, Gecaa^aur, Zeit. Wiss. Zool., Bd. 8, p.257^ 1856,  - 106 Liriox>e tetrapnylla, 3igelow, H.B., Mem.Mus. Comp.Zool. at Harvard College, vol.37, plate 3, figs. 6,7; plate 4, figs,2,3, p.112, 1909. Lirio'Pg tetrapnylla, Mayer, Medusae of the World, vol.2, p.418, plate 53, fig. 4?,  1910,  Distribution;- West Coast of Lower California and Central America (Bigelow).  Liriope, species (?) Bigelow. Liriope, species?, 3igelow, H. B., Mem. Mus. Comp. Zool. at Harvard College, vol,37, p.115, 1909. Bis tribution: - West Coast of Lover California, Coast of Salvador, (Bigelow).  Genus GSHYOfllA Peron and Lesueur. Geryonia oroboscidalis (?orskal). Medusa proboscid;. lis, Porskal, Descript. animalium Hauniae, p.108; loon,, taf. 36, fig. 1.  1775.  Geryonia oroboscidalis, Bsciischoltz, Syst. der Acal. p.88.  1829.  Geryones mexicana, + O.^rEiar is rosea, (young medusa) Agassiz, A., and Mayer, Mem.Mus.Comp.Zool. at Harvard College, vol,26, Ho,3, p.149, plate 4, figs. 17, 18.  1902.  Geryonia proboscidalis, Bigelow, H.B., Mem.Mus.Cfcmp.Zool. at Harvard College, vol.37, p.116.  1909.  Geryonia proboscidalis, Mayer, Medusae of the World, vol.2, p.425, plate 53, figs. 1-3; plate 54, fig.10. 1910, Dlstribut ion:- Off Coast of Mexico (agassiz and Mayer); Off west Coast of Lower California (Bigelow).  - 107 -  Qrdor mQQMSpggAg.  Genus QUHQgTAJTILi.  Haeokel.  jjjjnjj^jyoJJja^j^l^gajjJUi MoCrady. punoctantha ootonarlat MoCrady, Gymn. of Charleston Harbour, Proc. 311iott Soo.( vol.1, p.211, plate 12, figs. 4, 6.  1857.  Qunootantha ootonarlat Bigelow, H.B., Mem. Mus. Comp. Zool. at Harvard College, vol.37, p.52, plate 14, fig.4;  plate 15, figs. 5, 6| plate 17,  figs. 2,4,5.  19u9.  Cunootantha ootanL.ri^T Mayer, Modusae of the 'world, vol. 2, p.461y 464, plate 55, figs. 1, 1', 2,  1910.  plstrlbutlont- Aoapulco Harbour, Coast of Mexloo. (Bigelow).  QuaQOtftBtha tnatllA Bigelow. Cunootantha toneila, Bigelow, H.B., Mem.Mas. Oomp, Zool.at Harvard Oolloco, vo3.37, p.54, plate 15, flg.4| plate 16, fig.2| plate 17, figs.6,7.  1909.  Qunootantha tenalla, Mayer, Medusae of tha -oi*ld, vol.2, p.467, 1910, Distribution:- Aoapuloo.Harbour, Coast of Mexloo (Bigelow).  Genus CUHIHA Bsohsoholta. Cnnlna yloboaa Sschsoholtu. Cunlna globosaf Eaohooholts, Syst. dor Aoal., Berlin, p.117. taf. 9, fig. 3.  1829.  Cunlna alobosa, Haeokel, Syst. der Medusen, p.319.  1879.  - loe Cunina e l o b o s a . Bigelow, H. 3 , , Mem. Mus. Comp, Z o o l . a t Harvard College, v o l , 3 7 , p . 5 7 , p l a t e 15, f i g , 3 ; p l a t e 17, figs, 3,8.  1909.  D i s t r i b u t i o n ; - J u s t West of Aoapulca H a r b o u r , Coast of Mexico,  (Bigelow)»  .QwaAfl-9- P.er.e&cfota B i g e l o w . Cunina p e r e g r i n a ,  Bigelov;, H . B . , Mem. Mus. Comp. Z o o l . a t C o l l e g e , v o l . 5 7 , p . 5 9 , p l a t e 1, f i g , 15, f i g s . 1,2; fig.  8.  p l a t e 28, f i g s . 1 - 7 ;  Harvard  6;  plate  p l a t e 45,  1909,  D i s t r i b u t i o n ; - J u s t U o r t h of t h e E n t r a n c e to t h e Gulf of California  (Bigelow).  Genus SOLHISSUS H a e c k e l . S o l m i s s u s i n c i s a (Fewltes ) . S o l r o a r i s i n c i s a , Fewkes, R e p o r t Commission J?ish and F i s h e r i e s , f o r 1884, p . 9 5 4 , p l a t e 9 , Solmissus i n c i s a ,  U.S.A.  1886.  Bigelow, K . B . , Mem. Mus. Comp. Z o o l .  at  Collsege, v o l . 3 7 , p . 6 7 , p l a t e 2 1 , f i g s .  Harvard 1,2,3,5, 1909,  Solmissus incisa. Mayer, Medusae of the World, vol. 2, p.483, 1910. Solmissus incisa, Bigelow, H.3., Proc. U.S. Hat. Mus., v61.44, p.57, 1913.  Distribution;- albatross  .Station - 4759, 4760, B e r i n g S e a . (Bigelow).  I-'amily AEG P U P A E Genus AEGIHA Eschscholtz. Eschscholtz.  - 109 Aeftina c i t . r e a t  Esehscholtz,  Syst,  dar A c a l . , p , 1 1 3 , t a f . 1 1 ,  fig,4, 1829.  Aefcina o i t r e a r  Kaeckel,  Syst,  der Medusen, p . 3 5 8 ,  Aeeina c i t r e a .  Bigelow,  H . B . , Mem. Mus. Corap. 2 o o l .  lege, vol,37, p.73, plates Aeerina o i t r e a ,  1,14.  1879. at Harvard  Col-  1909.  Bigelow,  H.B., P r o c . U . S . Hat. Mus,, v o l . 4 4 , p , 5 9 , 1913. Distr i'oution; - i>an Francisco, Galfornia (Bigelow).  •gegina, rosea. Bschschcltz. Aegina rosea t Esehseholtz, Syst. der Acal. p. 115, taf. 10, fig.3, 1829. Aeeina alteraans f Bigelow, H.B., Mem. Mas. Comp. Zool. at Harvard College, vol,37, p.74, plate 17, fig.l, 1909. Aeaine rosea, Bigelow, H.B,, Proc. U.S. Hat. Mus. vol. 44, p.59, 19 19 specimens were collected in a vertical haul, H. 3. of Five Fingers I., Hov. 25, 1918. All approx.ima.ted a size of 4 run, in bell height and 4 mm. bell diameter.  4 tentacles about 3 times  the bell height; 4 gastric pouches divided interradially, but there were no signs of adradial notches. ocysts to a quadrant.  There were from 4 to 6 lith-  Mayer states that there are typically 8  marginal sensory, 2 to a quadrant.  Tanhoffen has found 16 in  one quadrant. The largest specimen had a bell height of 7 mm. and a bell diameter of 7 mm.  It was collected in a plankton net off Five  Finger I., July 10, 1915. Distributio n;- Albatross stations - 4761, 4774 (Bigelow); Horth of Five Finger I., 40-0 f., mi.U.S. of Five Finger I., 100-0 f., Off Berry Point, 10-0 f.  - 110 Aeaina species. (?) Bigelow. 4-egina species (?) t Bigelow, H.B., Proc, U.S. Hat. Mus., vol.44, p. 59. 1913, "In these young Aaginasf the 8 gastric pouches (all have 4 antimeres) are not divided secondarily, and in our present comparative ignorance of the growth-stages of the genus, it is impossible to be certain  & ether they belong to A. rosea or A,.  ttitrea. None of them are in good enough condition for me to count the otocysts",  3igelow, 1913.  Distribution:- Albatross Stations - 4762, 4785, 4793, 4797, 4805, 4806. (Bigelow).  Genus. AB^IfflUfiA H a a c k a l . A a g l n u r a grjraalcLJl H a a s . -, i i . : r - | "ii..,.i.i [ l t  :  .:,  t e s u l t a t a l e a Owap, 3 o l t P r i n c e Ae  Monaco...faso. 19-28, Aecinura g r i m a l d i i ,  28, p . 3 8 , p l a n e h e , 3 ,  figs.  1904.  Bigelow, H . B . , P r o c . U . S . H a t . M u s . , v o l . 4 4 , p. 61.  1913.  D i s t r i b u t i o n ; - A l b a t r o s s s t a t i o n s - 4764, 4 7 6 6 , 4768, 4780, 4 9 5 3 , 5058, 5084.  (Bigelow).  Genus ABGIH0PSI3. B r a n d t . A a g i n o p s i a , l_urfln_LLl, Aeginop»la,laurentH,  Brandt.  B r a n d t , Horn. Acad. S t . P e t e r s b o u r g , tome 4 , S o i . S a t . , £ . 3 6 3 , t a f . 6 ,  ser.  6,  fig.1-6 1838.  Aeglno-palB l a u r e n t l l . A g a s s i * , A . , S o r t h imer. A o a l . p . 5 4 , 1 8 6 5 .  - Ill  -  Aeginops.ia,. 1 a n r o n t x i t Hayer, Medusae of t a e World, v o l . 2 . p . 4 7 2 . 1910. A e s i n o p s i s l a u r e n t i i , B i g c l o v , H . B . , R e p o r t Can... A r c t i c Sxped. vol. Fill,  p a r t K, p . 1 1 , p l a t e 2, f i g . 3 . 1 9 2 0 ;  D i s t r i b u t i o n ; - B e r i n g Oea, ( B r a n d t ) ; L a u r e n t Bay, B e r i n g Sea, { M e r t e n s } ; Off C o l l i n s o n P o i n t , A l a s k a  (Bigelow).  Qeixvi ftOLytTfljVnLLA H a e c ^ e l . S.o.ltaviua,ol 1 a B i tentaoi'. 1 uta. ( Q.uoy and G a i m a r d ) . Oharyadea > i t e n t a c n l a t a T  Quoy e t Gaimard, Voyage de  1'Astrolabe,  4 , p . 2 9 5 , planolxe 2 5 , f i g s . 4 , 5 , Solmundella b i t e n t a c u l a t a f  1833.  Maas, Revue i u i s s e Z o o l . , tome 4 , p.99.  1906.  S o l c m n d e l l a b i t e n t a o u l a t a T Bigelc-.v, H . B . , Mem. Hus. Gomp. Z o o l . , a t Harvard C o l l e g e , v o l , 3 7 , p , 7 7 , p l a t e 2, f i g ,  3,  1909.  Sol jsr-in d o 11 a ft 11 c n t ao n 1 a t a T i i a y j r , -iedusae of one World, v o l , p„4c5.  1910.  D i s t r i b n t i o n ; - West Coast of Lower C a l i f o r n i a and l i e x i c o . (Bigelow.  2,  - 112 -  BIBLIOGRAPHY . (Only those papers referred to in the synonymy or in the text ere listed).  Agassiz, >_. 1862,  The Aoalephan f a u n a of t h e s o u t h e r n c o a s t Massachusetts  (Buzzard Bay).  B o s t o n S o c i e t y of H a t u r a l  1855.  of  t h e Museum of  P r o c e e d i n g s of  History,  U o r t h American A c a l e p h a e .  vol.8,  Illustrated  C o m p a r a t i v e Zoology a t  C o l l e g e , Ho. 2 . p . x i v  234,  of  360  the  224,  p.  Catalogue Harvard  figs.  Agassis., -a. and Kay_o,rT A . G» 1899.  Acalephs fros the Fisi Islands.  Bulletin of  the Museum of Comparative Zoology at Harvard College, vol.32, p.157 - 189, 1902.  17 plates.  Reports or. the Scientific Results of the Erpedr it ion to the Tropical Pacific in charge of Alexander Agassiz hy the U. S. Pish Commission Steamer "Albatross", from August, 1899, to Maroh 1900. III. Medusae, Memoirs of the Museum of Comparative Zoology at Harvard College, vol. XXVI, p. 139-176, 14 plates.  Agassiz, h. 1849.  On the Haked-eyed Medusae of the Shores of Massachusetts in their perfect state of development,  - 115 Oontribut loss to the Natural History of the Acalephae of Horth America.  Memoirs of tlie Ameri-  can Acadamy, ne'v series, vol. 4, p. 221-516, 8 plates. Contribution* to the Natural History of the United States of America,  Boston, vol. 4, p.1-572, plates  20-55, Ald3JU_J 1856.  A notice of soirt3 ne" genera and species of British hydroid zoophytes.  Annals and Magazine  of Hattxral History, 2nd, series, vol. XVIII, London,  1859.  Hotes on the Hydroid Zoophytes.  Annals and Mag-  azine of Natural History, series 5, vol,4, p.157^144, 1864.  Hotes on the Hydroida.  Annals and Magazine of  Natural History, series 5, vol. XIV, 1878,  Hydrozoa: in Gapt. Sir G.3. Hares* Harrative of a Voyage to the Polar Sea daring 1875-76, in H, 11, Ships, .Alert and Discovery, London, vol. 2, p.290-292,  Benedon, P.J, van 1844,  Memoiro s u r d'Ostende^,  l e s C a m p a n u l a r r e s de l a 0(5te eonsideres  erabryogenique  sons l e  et zoologique.  1'Academe Boyal, B r u c e l l a s ,  raprjort  physiologiq^^e,  H o u v e l l e Memoires de toae XVIII, p . l  - 42.  B_igaiow, , H , 3 t 1904.  Medusae from t h e Maldive  Islands.  Bulletin  t h e Museum of C o m p a r a t i v e Zoology a t H a r v a r d  of College  - 114 TOl. 89, p.245 - 269, 8 plates. 1909a.  Cambridge.  Reports on the doientifio Results of the Expedition to the Eastern Tropioal Pacific, in oharge of Alexander Agassis, by the U. b. Fish Commission Steamer, "Albatross", from Ootobar, 1904, to March, 1905. XVI.  The Medusae.  Bemoirs of the Museum of  Comparative Zoology at Harvard College, vol.37, p. 243, 48 plates. 1909o.  Coelenterates from Labrador and Hewfoundland, oolleoted by Mr. Owen Bryant from July to Oofcober, 1908.  Proceedings of the United States Motional  Museum, vol.37, p,301-320, plates 30-32, Washington. 1913.  Medusae and Siphonophorae oolleoted by the U. 3, Fisheries Steamer "Albatross" in the northwestern Pacific, 1906,  Proceedings of the United States  National Museum, vol. &4, p.1-119, plates 1-6. Washington, 1915.  Bporetmus, a nevr genus of Trachomedusee.  Pro-  ceedings of the United States National Museum, vol. 49, p.399-404, plate 59. 1916.  Washington.  Hal imedusa, a new genus of Anthomedusae.  Trans-  actions of the Royal Society of Canada, series III, vol. X, section iv, p.91-95, jlate 1, Ottawa, 19 20.  Medusae and Ctenophora.  Report of the Canadian  Arctic Expedition, 1913-1918.  Southern Party,  1913-1916, vol. VIII, part H, 22 p. 2 plates. Ottawa,  - 115 Boehra. 1878.  Helgolander Leptomedusen.  Jena Zeitschrift  fur Saturw. Bd. 12, p. 68-199, plates 2-7. Brandt. J.I. 1854.  Prodromus Descriptionis Animalium ab II. Mertensio in orbis terrarum circumnavigations observatorum.  Fasoio 1, in Recueil Aotea seances  pub-  liques Academle Imperial de Scienoe. Jt. Petersbourg, 1853-1834, 76 p., 1 plate. 1837.  Remarques ear quelques modifications dans 1 * arrangement de l'or&re des Aoalephes discophores ou orabrelliferos.  Bulletin de scientifique  Aoademie Imperial de, Science, St. Petersbourg. vol. 1, p. 185-191. 1838.  Ausfuhrliche Beschreibung der von 0. PI. Martens auf seiner Weltumsegelu'ag beobachteten Schirraquallen....Hemoires Academie 3t, Petersbourg, sen. 6, vol.4, Sci.Math. et Nat,, tome 4, p.237-411, plates 1-31.  BrOY7neP  E.g.  1503.  R e p o r t on some Medusae from Norway and S p i t z b e r g e n . B e r g o n s . Mus. A r b o g , , Ho. 4 , 36 p . , 5 p l a t e s .  1504.  Hydromedusae, w i t h a t t e v i s i o n of t h e and P e t a s i d a e .  Fauna and Geography of t h e Maldive  and L a c c a d i v e A r c h i p e l a g o e s , v o l . 2 , plates  54-57.  Williadae  p.722-749,  - 116 Oalitlnsr  G.IT.  1899.  Some h y d r o i d s from P a g e t Sound.  P r o c e e d i n g s of  t h e Boston S o c i e t y of N a t u r a l H i s t o r y , v o l . 2 8 , Ho. 1 3 , p . 3 3 3 - 3 6 7 .  Boston.  Ohamisso, A . d s , and ^ s e n h a r d ^ 1821.  0.,^.  De Animalifeus quibusdam e O l a s s e Vermium Linneana.,..Pasc,  2 . Acad. Oaes, L e o p . , Hova  A c t a , 1 0 2 1 , v o l . &, p . 3 4 3 - 3 7 4 , p l a t e s  fllftrfrg.,  24-33.  3,P.  1876,  Report of the Hydroids on tho 0oa3t of Alaska and the Aleutian Islands collected by W. H. Pall, from 1871 to 1874.  Proceedings of the Academy of  natural Sciences of Philadelphia, p.205-238. 1907,  Reports on the 3oi9ntifio Results of the Expedition to the Eastern Tropical Pacific....vol,VIII. The Hydroids.  lomoirs of the Museum of Comparative  Zoology, at Harvard College, vol. 35, 18 p. 15 plateB.  3sohscholtzf Pr. 1829.  System der Aoalephen.  Eine ausfuhrliche Be-  schreibung aller Medusenartigen Strahlthiere. Berlin.  196 p., 16 plates.  Pabrlciust 0. 1780.  Pauna Gronlandioa.  Hafniae, 8°, 452 p., 1 plate.  *- 117 PawkosT J.W., 1886.  Report on the Medusae collected by the U.S. Pish Commission Steamer "Albatross" in the Region of the Gulf Stream in 1883-84, U.S. Commission of Fish and Fisheries.  Report of the Commissioner for  1884, p.927-980, plates 1-10. 1889.  Kew Invertebrata from the Coast of California, Bulletin of tne Bssex Institute, Salem, vol. 21, p.99-146, 7 plates.  1889b. On a few Californian JJedusae. uralist, vol. XXIII.  American nat-  p,591-602, plates 25-28.  16 figures in the text.  Fleming. 1823.  G l e a n i n g s or N a t u r a l H i s t o r y , Coast of S c o t l a n d ,  g a t h e r e d on tha  d u r i n g a voyage i n 1821j  Sdin. F i l l . J o u n r . v o l . V I I I . p . 2 9 4 - 3 0 3 .  ?orskalT_P. 1775.  Desoriptiones animalium....quae in itinere orientale observavit, post mortem ededit Carstem Niebuhr.  Hauniae, p.20 • xxxiv +  16, 1 map. 1776.  Ioones rerum naturalium quas in itinere orientale depingt ouravlt Petrus Forskal.... edidit Carstem Hiebuhr. Hauniae, 15 p., 43 plates.  - 118 Fprbes, 5. 1841,  Contributions to British ACtinology.  American  Magazine of Natural History, vol. VII, p.81-85. 1848.  A Monograph of the British Nakad-eyeu. Medusae. London, Z-LJ ^oci-jty, p.104, 13 platos,  Forbes. S^, and Goodslr. 1855.  On some remarkable Marine Invertebrata nev, to the British Seas.  Transactions of  the Royal Society of Jdinburgh, vol. XX, p.307-315, plates 9, 10.  grnsar. G.M. 1911.  The Hydroida of the Jest Coast of NorthAmerioa with special referanoo to these of the Vancouver Island Region.  Bulletin of the laboratories of  latural History, State University of Iowa, vol. VI, no. 1, p.1-91, 8 plates.  Iowa City.  1912.  Sndoorypta huntsmanl, Soienoe, vol. XXXV, p.216.  1912.  Some Hydroids of Beaufort, Horth Carolina. Bulletin of the Bureau of Fisheries, vol. XXX, 1910,  1914.  p.339-387.  Washington.  30 s Hydroids of the Vanoouve • Island Region and Hotes on some Alaskan Hydroids.  Transactions  of the Royal Society of Canada, seotion iv, vol. VIII, Third Series, p. 99-222, 37 plates.  Ottawa,  - 119 ftaganbaur. 0. 1856.  Versuoh eines system der Medusen, mit Beschreibung neuer oderwenig gekannter Formen. ... Zeit. Wiss. Zool., vol. VIII, p.202-273, plates 7-10.  Goto T  S. 1903.  The Craspedote Meduaa Olindias and some of its Natural Allies.  Ma~k Anniversary volume,  Cambridge, p.1-22, plates 1-3.  Report on the Invertebrates of Massachusetts. S72 p., 14 plates.  1879.  Camhridce.  Das System der Medusen. Theil.l. Systom der Oraspedoten.  Jena Denksohrifton, vol. 1,  560 atlas of 40 plates. 1380.  System der Aoraspedoten. Zwelte Halfte des Systems der Medusen.  Jena denksohriften,  vol. 1, 2 abth., p.361-672.  •-:-rtl..up._CJL.  1897.  Die Hydromedasen H e l g o l a n d s . f a u n a von H e l g o l a n d , X. snnt^rsuohnngen,  Beitx'age su M e e r e s -  Wissensohaftliohe  Meere-  h e r a u e g e g e h e n von dor Kommission  aur U n t e r s u o h u n g dor d e u t s o h e n Maere in K i e l uhd Aer B i o l o g i s o h e n A n s t a l t auf H e l g o l a n d , v o l . 2,  - 129 p. 451-512, plates 14-23, 1907,  Kiel und Liepzig.  Oraspedote Medusen. 1 Teil, 1 lieferung, Codoniden und Cladinemiden.  Nordisohes Plankton,  seohte Lieferung, No.XII, p.135, 1909,  126 fignren.  Meduses, in Due d'Orleans Crosiere Ooe&nographique, aocomple a Bord de la Belgioa dans la Mer du Gronland, 1905, 18 p. plates 76-77, Bruxelles.  <  1911.  Oraspedote Medusen. 1 Tell, 2 Lieferung. elidae.  Marg-  Hordisohos t?lankton, Funfzehnte Lioferung,  Ho. XII, p.137-235, figuren 127-199. 1913.  Oraspedote Medusen. 1 Teil, 3 Lieferung, Tiaridae, Hordisches Plankton, Siebzahnte Lieforung, No. XII, p.237-365, fijuren 200-311.  1917.  Oraspedote Hedusea. 1 Teil, 4 Lieferung, V/illiadee, Index, Figuren-Verzeiclinis, Liter«ii.ur-VerKelohnis, Nordischfts Plankton, Heunzehnte Lieforung, Ho.XII., p,365-479, figuren 212-347.  Hinoks. T, 1868.  A h i s t o r y of t h e B i - i t i s h Hydro id Z o o p h y t e s , 2 volumes,  London.  K i s h i n o u v e t K. 1910.  Some Medusae of J a p a n e s e W a t e r s .  Joitnr.  Coll.  S c i . Tokyo, v o l . 1 7 , a r t . 9 . 35 p . , 5 p l a t e s . Linnaeus, 0. 1758.  YOJI  Systecta n a t u r a e , . . . ' t i d . 10, v o l . 1,  822p.  - ltl -  1906,  Zoologlsohe Studion Its Ir.rent s-Beere. Tori. Klttlg. HydroBedusen.  loologlsohe %nseigor<  Bd. 28, p. 210-220,  1893,  Die Graspedotan kedusss dor PI an*ton ixpeditlou.  -ro«b, dor Pl&ckton-Sxpsdition dar  Huaboldt-Stlflung,  YOI.2,  K.o., 107, p,6,  plates, 2 naps, 1697,  Hoports on r\n Exploration off ths fast Ooasts of Mexloo, Oontral And South America, and off tha Galapagos Islands, In ohar(e of Alexander Agassis, by the U,3, Fish Commission Steamer, "Albatross", during 18il, XXI, Die Medusan, Memoirs af the Museum of Oon.p; retire Zoology at Harrard Oollige, T O I , XXIII, Mo, 1, 92 p., 15 plates,  1904,  Oaabridge.  Moduses prorenant dee OaBpagnes des Taohts  BlrfattUi at PrlaaoaBt-Allgq (i88»-i9o»). Results des Oaap, Sol. eto. par Albert l*r Prinoe Soursr&in 13 Monaoo..,. faso. SO, 71 p., 6 plates. 1905.  Die Oraspedoten Jfedusen der  Uboga-Sxpedltton,  Ult.kOB.op. Zool. B o t . , Ooeanogr. en Gael. Oebled. Siboga-fixpoditIon,  Monograph X,, 84  p . , 14 p l a t e s , 1905,  Meaaee 4'ABbolne (Toyage do a,Bedot e t 0,  - 122 Piotet dans 1?Archipelago Malais,  Revue Suisse  Zool., tome 14, p.81-107, plates 2, 3. 1909.  Japanisohe Medusen. P, Doflein, Beitrage gur Naturgeschichte Ostasiens, Abhandl. math, phys, Klasse K, Bayr, Akad. WisB. 1 suppl, vol,, 52, p., 3 plates.  Mayer, AJg. 1900.  Some Medusae from the Tortugas, Florida, Bulletin of the Museum of Comparative Zoology at Harvard College, vol, 37, p.13-82, 44 plates,  1904.  Medusae of the Bahamas,  Memoirs of the Natural  Science Museum of the Brooklyn Institute of Arts and Science, vol, 1, 33 p., 7 plate$. 1910,  Medusae of the World, 3 vols,, 734 p., 76 plates. Carnegie Institute, Washington, publication Ho, 109,  Muller, O^F. 1776.  Zoologiae danlcal prodromus seu animalium Daniae et Norvegiae indigenarum oharaoteres, nomina et synonyma imprimis popularium, Hauniae, 8°,  Murbaclat_ii. and Shearer Q. 1902.  Preliminary Report on aCollection of Medusae from the Coast of British Columbia and Alaska, Annals and Magazine of Satural History, series 7, vol. 9, p.71-73.  1903.  "On the Medusae from the Coast of British Columbia and Alaska. Proceedings of the Zoological  - 123 S o c i e t y of London, P a r t 2 , p . 1 6 4 - 1 9 2 , p l a t o s 1 7 - 2 2 .  MoOradv^JL. 1857,  Gymnopfcth-lci-t.- or Charleston Harbour. Proceedings of lha Slliott Society, vol. 1, p»103221, plates 8-12.  1899.  Hydro ids from ^iasko. ctnd Pugat Sound.  Pro-  oeedlngs Of cue United 3tates ifttioual Museum, vol. XXI, p.741-753. Washington. 1901.  The Hydro Ids of the Woods Hole Region.  U.S.  Pish Commission Bulletin for 1699, vol. XIX., p.325-386. 1901.  Washington.  Papers from the H^rrimr-n Alaska Sxpodition. XXI. "ho Hydro ids.  Proceedings oi the Washington  Academy Of SoieuOus, vol. III., p.157-216. Vahsihgton.  1885.  Allegmeine Haturgesohiohte fur alia Stande, Bd. V. Stuttgcrt.  1766.  Slenohus Zoolphytorum.  Ha,ag.  Pnron, P. and ttaBflur. 9.A. 1809.  Hlstoira Generale at Partiouliere de tous lea  - 124 Animaux qui oomposent la famille des Meduses. Annals Mus. Hist. Hat., vol. 14, p.218-228.  Quoy et Gaimard. 1833.  Zoologiej  in Voyage de decouvertes de 1'  Astrolabe, etc....de M.J.Dumont D'Urville. Paris, vol. 4, p.390, Atlas Zool., vol.2. Zoophytes, 26 plates.  Rathlcer„M.H. 1835.  BeschreiDung der Oceania "blumen'baohii ©iner oei Sevastopol gefundenen leuchtenden Medusa, in: Mem. .toad. lap, Sci. St. Petersbourg, vol.2, p.321-329, 1 plate.  Romanes, GnJ. 1876.  Am account of sama Haw 3pecies, Varieties and Monstrous Forms or Hedusae. Jours, linn. 5oc. London, vol. 12, p.524-531.  Torrey. H.B^. 1902.  The Hydroida of tha Pacific Coast of North America.  University of California Publications  Zoology, vol.1, p.1-104, plates 1-11, Bgrkely. 1904.  The Hydroids of the San Diogo Region.  Univer-  sity of California Publications Zoology, vol.2, Hos. 1 and ,% p. 1-51, plat© 1.  Borlcely,  - 125 1909,  The Leptomedusae of the San Diego Region, University of California Publications Zoology, vol,6, So, 2, p,11-31, text figures 11, Berkely.  Vanhoffen. B. 1902,  "Die Oraspedoten Medusen der deutschen TiefseeSxpedition". (•Valdivia' ), 1898-99. I. Iraohomedusen,  Y/isBen. Ergeonisse, 3d. Ill,, p,53-86 ,  Taf.Ii-iII.  Wright. g.S. 1862,  On the reproduction of Thaumantiae inconspioua. Quarterly Journal of Microscopic Science, new B.-rles, vol. II., London,  - 126 -  Plata Pig. 1. ? ^ n U Bay.  MiirUdta,  I.  iaaautura form.  Pound a t Look  Preo-haad s k e t o h .  P i g . 2 , H a l i t h o l n a p m p a g - Manubrium and gonad. Camera l u c i d a drawing. P i g . S. ADoral v i e w , showing eroao formation of gonads. J i g . 4 . L a u o k a r t i a r a o a t a n a . Matura form, s h s w i a e th« s t r u c t u r e of the g o n a d s .  Camera l a s Ida drawing.  P i g . 5 . Camera l u o i d a drawing of anothor s a t i r e P i g . 6 . L a u a k a - t i a r a nob i l i a -  forn.  Pree-hand Aketah Of  mature form, showing s t r u o t u r e o f  gonads.  - 127 -  Plato H .  Pig. 1, Leuokartiara brevlooaia. Frae-hand sketch of mature forxnr showing tha structure of the gonads, pics  in stomach wall, and general shape.  Pig. 2. Portion of ooll"margin to show tha structure and position of the tentacles.  Gamer luoida.  Pig. 3. Camera luoida drawing of perradial region, showing the jttraoture of the radial oanal and position and shape of gonads and pits. Pig, 4, Camera lucida  drawing of I?eo turris nelagioa.  The markings on the manubrium and suomach are elevations, not degressions. Pig, 5, Ileoturris plloata (?,) Camora luoida drawing. Pig, 6, Enlarged drawing of the side Of the manubrium to show the shape of the gonads. Fig, 7, gougainvillia pmlliientaculata. Camera luclda drawing of one side Of the manubrium to show the shape of the gonads and the oral tentacles.  - 128 -  Plata  III.  F i g . 1 . Oamera l u o i d a d r a w i n g of B o u f r a i n v i l l i a t a n t a c u l a t a . - Mature F i g . 2 . A m a r g i n a l c l u s t e r of  roulti-  specimen. tentaolea.  F i g . 3 . Bougalnv i l l l a norda,afcrdlJ,» Oamera l u o i d a d r a w i n g . Fig. 4. A marginal c l u s t e r Fig. 5.  of t e n t a c l e s .  Free-hand*  P r o b o s c i c l a o t y ] a p o ] v n e a a . Oamera l u e i d a  drawing.  F i g . 6 . A s i d o v i e . / of a n o t h e r s p e c i m e n . Oamera l u o i d a drawing. F i g , 7 . High power drawing t o show t h e r a d i a l o a n a l branches.  and  - 129 -  P l a t e IV.  F i g . 1. ProDOPQid-vOtyl^ polyneiqa. Enlarged drawi a quadrant vo show the d i r o o t i o n of the branches cf the r a d i a l canals and the i of the t e n t a c l e s . F i g . 2 . .gtattroohora p n r p a r e s . Aborsl rlew skowir shape of the month and connection to tit r a d i a l oe.nt.ls. F i g . 3 . Pree-hand sketch of e n t i r e specimen. F i g , 4. P o r t i o n of b e l l margin showing two t e n t a knobs and t h r e e l i t h o c y s t s . F i g , 5 , P o r t i o n of b e l l margin showing tfce shape the t e n t a c l e k n o b s . Fig, 6,  mtroooma ejnuoea.  Free-hand drawing.  Fig, 7, fiaropsldinm &al.*&3±* Oral riew ohowing t e n t a c u l a r prooessos of the r a d i a l oana.  - 130 -  Plate 7.  Pig. 1.  Halistaura aellularia.  Camera luoida d  of a sense pit. A,..Exumbrellar surface of velum. B.. .Oolv.mnar cells of exumbrollar eo C...Cells of subumbrellar layer. D....Columnar oells of exumbrellar ec bordering marginal ring. S...Exumbrellor cells bordering marg ring. Pig. 2.  Camera luoida drawing showing the relat position of sense pits and tentacles, Ve...,ve3um.  Marg,,. .marginal ring.  S,P...sense pit. "f ent... tentacles.  v  x>^im,.  Plate  I.  .  Plate  II.  


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