CTENOPHORA. 75 



3. Pleurobrachia crinita (Moser). 



Pleurobrachia crinita. F. Moser. Die Ctenophoren d. deutsclien Sudpolar-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 

 Mertensia 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 Pleiiro- 

 brae Ilia. Ghigi (Op. cit.) has established a separate genus, Moser ia, 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 Euplokaviis 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 natural 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 Etiplokamis australis ought really be grouped with 

 them seems to me less convincing. 



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



Beroe infundibulum. O. Fr. Muller. Prodromus Zoologise Danicse. 1776. p. 232. No. 2816. 



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



Bolma septentrionalis. H. Me r tens. Die beroeartigen Acalephen. 1833. p. 515. Taf. 7. 

 Mn&mia norvegia. M. Sars. Beskrivelser og lagttagelser. . . 1835. p. 32. Tab. 7. Fig. 16. 

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



Bolifia alata. L. Agassi z. On the Beroid Medusae of the Shores of Massachusetts. Contrib. to the 



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

 1850. p. 349. PI. VI— VIII. 



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



— tnicroptcra. A. Agassiz. Ibidem, p. 19. 



— htfundibulum. Chun. Ctenophoren d. Golfes v. Neapel. 1880. p. 294. 



— norvegica [^•a.xs). C. Vogt u. E.Yung. Lehrbuch d. praktischen vergleichenden Anatomic. 



1888. I. p. 170—195. 

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



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



