STHENONLE. 43 



Aurelia labiata Cham, et Etsen. 



Aurelia lahiala Cham, et Eysenh. N. Acta, X. p. 358, PL 38, Fig. 1. 



Medusa labiata EsCH. Syst. d. Aeal., p. 64. 1829. 



Ocyroe labiata Bl. Man. U'ActinoL, PI. 42, Figs. 1, 2. 1834. 



Aurelia labiata Less. Zoopli. Acal., p. 377. 1843. 



Aurelia labiata Agass. Cout. Nat. Hist. U. S., IV. p. IGO. 18C2. 



Many of the Discophora} 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 harl:)or of 

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

 Discophorag 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 STHENONIiEI Agass. 



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



HECC^DECOMMA Br. 



/Teccarfecomma Brandt. Mem. Acad. St. Petei-sb., p. 300. 1838. 

 Hecccedecomma Agass. Cont. Nat. Ilist. U. S., IV. p. 161. 18C2. 



Heccaedecomma ambiguum Br. 



Hecccedecomma ambiguum Br. Me'm. Acad. St. Petei-sb., p. 300. Pis. 27, 28. 1838. 

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

 Cijanca 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 prol)- 

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

 America. 



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



