CTKNOPHORA. 75 



3. Pleurobrachia crinita (Moser). 



Plcurobrachia crinita. F. Moser. Die Ctenophoren d. deutschen Siidpolar-Exped. p. 147. Taf. XX. 



Fig. 7-10. 



This peculiar species, which is hitherto known only from Greenland (the Karajak-Fjord, Van- 

 h of fen), has not been brought home by any of the Danish Expeditions. That it must be distributed 

 along the whole of the West Coast of Greenland can scarcely be doubtful, and likewise it can 

 scarcely be doubted that it has a much wider distribution, the existence of very local forms of pelagic 

 animals being upon the whole not very probable. - Whether it is a specially cold-water form, like 

 Mcrtcnsia ovum, cannot be decided from the little information hitherto given of it. 



It may perhaps be doubted that this species should really be referred to the genus Pleuro- 

 brachia. Ghigi (Op. cit.) has established a separate genus, Moseria, for those species with the mouth- 

 edge bent outwards so as to form a funnel-shaped collar (viz. Pleurobr. pigmentata Moser, PI. striata 

 Moser and Euplokamis australis Benham). It is not impossible that the PI. crinita ought also to be 

 referred to this group (to the genus Tinerfe Chun it also bears some resemblance). I would, however, 

 remark that the main character of the genus Moseria as diagnosed by Ghigi very much needs to be 

 verified by study of the living forms. The mouth opening can greatly alter its shape in Pl.pileus e. g., 

 and in some preserved specimens it may be quite funnel-shaped. It would then not be unreasonable to 

 suppose, that the nattiral shape of the mouth in these forms is perhaps not as in the preserved speci- 

 mens, after which these species have been described. I would be inclined to think the character of 

 the costse of more importance. In any case I agree that the two species, pigmentata and striata appar- 

 ently stand apart from the other species. Whether Euplokamis australis ought really be grouped with 

 them seems to me less convincing. 



4. Bolina infundibulum (O. Fr. Muiier). 



Beroe infundibulum. O. Fr. Mil Her. Prodromus Zoologiae Danicse. 1776. p. 232. No. 2816. 



O. Fabricius. Fauna gronlandica. 1780. p. 360. 



Bolina septcntrioualis. H. Mertens. Die beroeartigen Acalephen. 1833. p. 515. Taf. 7. 

 Mncniia norvegia. M. Sars. Beskrivelser og lagttagelser. . . 1835. p. 32. Tab. 7. Fig. 16. 

 Cydippe quadricostata. M. Sars. Ibid. p. 36. Tab. 8. Fig. 18. 



Bolina alala. L. Agassiz. On the Beroid Medusae of the Shores of Massachusetts. Contrib. to the 



Nat. Hist, of the Acalephae of North America. II. Mem. Amer. Ac. IV. 

 1850. p. 349. PL VI VIII. 



A. Agassiz. North American Acalephse. 111. Cat. Mus. Comp. Zool. II. 1865. p. 15 18. 

 inicroptcra. A. Agassiz. Ibidem, p. 19. 



infundibulum. Chun. Ctenophoren d. Golfes v. Neapel. 1880. p. 294. 

 norvegica (Sars). C. Vogt u. E. Yung. Lehrbuch d. praktischen vergleichenden Anatomic. 



1888. I. p. 170 195. 



Lesueuria vitrea M. Edwards. M'Intosh. Notes from the St. Andrews Marine Laboratory. Annals 



Mag. Nat. Hist 6. Ser. II. 1888, p. 464; 6. Ser. V. 1890, p. 46. 



10* 



