70 OCEANIA. 



this is really the case, as we have nothing of the sort among any of the 

 other Hydroid Medusae. 



Massachusetts Bay (Agassiz), 



Cat. No. 266, Boston, April, 1862, A. Agassiz. Medusa. 



Cat. No. 267, Boston, May, 1862, A. Agassiz. Medusa. 



Cat. No. 358, Boston, May, 1862, H. J. Clark. Medusa. 



OCEANIA Per. et Les. 



Oceania Per. et Les. Ann. du Mus., XIV. p. 32. 1809. 



Thaumantias Escii. Syst. d. Acal., p. 79. 1829. 



Oceania Less. Zooph. Acal., p. 318. 1843. 



Phialidium Leuck. Arch. f. Nat., I. 1856. 



Epenthesis McCr. Gymn. Charl. Harb., p. 89. 



Oceania Agass. Cont. Nat. Hist. U. S., IV. p. 352. 1862. 



Wrightia Agass. Cont. Nat. Hist. U. S., IV. p. 354. 1862. Hydrarium. 



Oceania folleata Agass. 



Oceania folleata Agass. Cont. Nat. Hist. U. S., IV. p. 353. 1862. 

 Epenthesis folleata McCr. Gymn. Charl. Harb., p. 89. 



Charleston Harbor (McCrady). 



Oceania languida A. Agass. 



Oceania languida A. Agass.; in Agassiz's Cont. Nat. Hist. U. S., IV. p. 353. 1862. 

 Hydrarium. The American species of Wrightia mentioned in a note by Professor Agassiz, in 



Cont. Nat. Hist. U. S., IV. p. 354. 1862. 

 ? Campanularia syringa Stimps. Mar. In v. Grand Manan, p. 8. 1853. 



It must remain doubtful whether this species is not the Ef)entliesis 



folleata McCr. found in Charleston Harbor. McCrady observed only a 



single specimen, and his description is too short not to leave some doubt 



Fi?. 94. on this point. His single specimen, moreover, was 



not in a normal condition, as he says there were 



five labial appendages. From the fact that there 



is but one marginal capsule between each tentacle 



in the Charleston species, and rarely two, while 



there are always two, and frequently three, in the 



specimens taken on our coast, I would infer that 



they are distinct species. 



The capsules are small, and contain only one 

 large granule. The bulbs at the base of the ten- 

 tacles (6, Fig. 94) are large swellings, colored with dark pigmentrcells ; 

 the tentacles are thread-like, very extensible, with lasso-cells scattered 



Fig. 94. Two marginal tentacles, with a portion of the circular tube, c, one of the marginal 

 capsules in process of division ; h, sensitive bulb of tentacle. 



