CLYTIA. 77 



CLYTIA Lamx. 



Clytia Lamx. Bull. Soc. Phil. 



Chjtia Agass. Cont. Nat. Hist. U. S., IV. pp. 297, 354. 1862. 



Caiicella HiNCKS. 



Trochopyxis Agass. Cont. Nat. Plist. IT. S., IV. pp. 297, 354. 1862. 



fPlatypyxis Agass. Cont. Nat. Hist. U. S., IV. pp 306, 354. 1862. 



The adult Medusa of Platy2')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 Medusse are very much 

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

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

 but totally different in the adult forms. 



Clytia intermedia Agass. 



Clytia intermedia Agass. Cont. Nat. Hist. U. S., IV. p. 805, PI. 29, Figs. 10, 11. 1862. 



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



Clytia VOlubilis A. Agass. 

 Campanularia voluhilis Alder (jion Auet). Cat. Zooph. Northumb. and Durham, p. 35. 



Alder was the first to distinguish the several species which have 

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

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

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

 seeming to leave Uttle 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. 



