EUDENDRIUM. 159 



all over the stem, resembling in this respect very strikingly the Pcri- 

 gonimus of Sars, to which the Ilytlrarium also bears a close affinity, 

 from the size of its sterile Polypes. 



Charleston Harbor (McCrady) ; Buzzard's Bay, Naushon (A. Agassiz). 



Cat. No. 43, Naushon, Mass., Sept. 1861, A. Agassiz. Hydrarium. 



Cat. No. 437, Naushon, Mass., 1864, A. Agassiz. Medusa. 



EUDENDRIUM Ehrenb. 



Eudendrium Ehrenb. Corall. d. Roth. Meeres. 1834. 

 Eudemlrium Agass. Cont. Nat. Hist. II. S., IV. p. 342. 1862. 

 Calamella Oken. Lehrb. der Naturg. Gesch. ISl.'i. 

 Thoa Lamx. Pol. Cor. Flex. 1816. 



Eudendrium dispar Agass. 



Eudendrium dispar Agass. Cont. Nat. Hist. U. S., IV. pp. 285, 289, 342, Fig. 36 ; PI. 27, Figs. 



10-21. 1862. 

 Thoa dispar Agass. Cont. Nat. Hist. U. S., IV. PI. 27, Figs. 10-16. 1862. 



This Hydroid (Fig. 249) is closely allied to the 

 Tubidaria ramea of Dalyell and the Coryne jm- 

 silla var. miiscoides of Johnston. The male and 

 female communities are readily recognized by the 

 different color of the Meduste buds ; the male Me- 

 dus£B buds are bright orange, while the females 

 are of a dull pink. 



Massachusetts Bay (Agassiz). 



Cat. No. 34, Nahant, Mass., Sept. 1854, H. J. Clark. Hydrarium. 



Cat. No. 35, Suisconset, Mass., July, 1849, L. Agassiz. Hydrarium. 



Cat. No. 36, Nahant, July, 1861, A. Agassiz. Hydrarium. 



Cat. No. 37, Nahant, July 11, 1861, A. Agassiz. 



Cat. No. 38, Naushon, Mass., September, 1861, A. Agassiz. 



Cat. No. 405, Nahant, June, 1862, A. Agassiz. Hydromedusarium. 



Cat. No. 423, Eastport, Me., A. E. Verrili. 



Museum Diagram No. 23. 



Fig. 249. Female Meduscc buds in different stages of development. 



