fO 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. 



Tlianmantin* Escii. Syst. d. Acal., p. 79. 1829. 



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



Phiallilium 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 McCu. 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 syriuga STIMPS. Mar. Inv. Grand Manan, p. 8. 1853. 



It must remain doubtful whether this species is not the Epenthesis 

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

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



on this point. His single specimen, moreover, was 

 not in a normal condition, as he says there w r ere 

 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 pigment-cells ; 

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



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

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



