C'LYTIA. 77 



CLYTIA Lajlx. 



Chjtia Lamx. Bull. Soc. riiil. 



Clytm AoAss. Cont. X;it. Hist. U. S., IV. pp. 297, 354. 1862. 



Calicclla Hincks. 



Trochnpiixis Agass. Cont. Nat. Hist. II. S., IV. pp. 207, 354. 18G2. 



? Plali/pi/xis Agass. Cont. Nat. Hist. U. S., IV. pp 300,354. 18G2. 



The adult Medusa of Platyj)yxis cylindrica of Professor Agassiz is 

 not known ; he has separated this genus from Clytia from the character 

 of the reproductive calycles only. The young Meduste are very much 

 alike, and we may have a case here, the reverse of what "we find in 

 Sarsia and Syndictyon, of Medusae very similar in their yomiger stages, 

 but totally different in the adult forms. 



Clytia intermedia Agass. 



Chjtia intermedia Agass. Cont. Nat. Hist. U. S., IV. p. 305, PI. 29, Figs. 10, 11. 1862. 



Cat. No. 143, Nahant, Mass., April, 1855, H. J. Clark. Hydrarium. 



Clytia volubilis A. Agass. 

 Campanularia volubilis Alder (jwn Aiitt). Cat. Zoo])Ii. Nortliunib. and Durham, p. 35. 



Alder was the first to distinguish the several species which have 

 been confounded under the name C. volubilis by different authors. 

 Specimens in no way to be distinguished from the European C. volu- 

 bilis have been found on our coast with their reproductive calycles, 

 seeming to leave little doubt that the specimens here catalogued 

 belong to this species. 



Massachusetts Bay (L. Agassiz) ; Cape Cod (L. Agassiz). 



Cat. No. 145, Norway, Sars. Hydromedusarium. 



Cat. No. 146, Cape Cod, June, 1857, Captain N. E. Atwood. Hydro- 

 medusarium. 



Cat. No. 432, Sea Coal Bay, N. S., 1861, Anticosti Expedition. Hy- 

 dromedusarium. 



Cat. No. 435, Mingan Islands, 1861, Anticosti Expedition. Hydro-, 

 medusarium. 



