STHENONLE. 43 



Alirelia labiata CHAM, et EYSEN. 



Aurelia labiata CHAM, et EYSENH. N. Acta, X. p. 358, PI. 38, Fig. 1. 



Medusa labiata ESCH. Syst. d. Acal., p. 64. 1829. 



Ocyroe labiata BL. Man. d'Actinol., PI. 42, Figs. 1, 2. 1834. 



Aurelia labiata LESS. Zooph. Acal., p. 377. 1843. 



Aurelia labiata AGASS. Cont. Nat. Hist. U. S., IV. p. 160. 1862. 



Many of the Discophone of the southern part of the Northwest Coast 

 must breed during the whole year, as I have found the adult with the 

 ovaries fully developed during nearly every month of the year, in the 

 harbor of San Francisco. This is at least the case with Phacellophora 

 and Aurelia, which are the two most common genera of the harbor of 

 San Francisco. Further north, however, in the Gulf of Georgia, the 

 Discophorre pass the winter in their hydra state. 



North California (Cham, and Eysen.) ; California (Eschscholtz) ; San 

 Francisco Bay (A. Agassiz). 



Aurelia marginalis AGASS. 



Aurelia marginalis AGASS. Cont. Nat. Hist. U. S., IV. pp. 86, 160. 1862. 



Florida, Key West (L. Agassiz). 



Cat. No. 352, Key West, Fla., L. Agassiz. 



Family STHENONI^E Agass. 



Sthenonice AGASS. Cont. Nat. Hist. U. S., Vol. IV. pp. 115, 161. 1862. 



HECC^DECOMMA BR. 



Hecccedecomma BRANDT. Mem. Acad. St. Petersb., p. 300. 1838. 

 Hecccedecomma AGASS. Cont. Nat. Hist. U. S., IV. p. 161. 1862. 



Heccaedecomma ambiguum BR. 



Hecccedecomma ambiguum BR. Mem. Acad. St. Petersb., p. 300, Pis. 27, 28. 1838. 

 Heccaedecomma ambiguum AGASS. Cont. Nat. Hist. U. S., IV. p. 161. 1862. 

 Cyanea ambigua LESS. Zooph. Acal., p. 388. 1843. 



A species of this genus was observed in the Straits of Fuca, agreeing 

 with the description and figures of Mertens so closely, that it is prob- 

 able he observed this same species on the coast of Russian North 

 America, 



Port Townshend, W. T. (A. Agassiz). 



