TRACIIYNEMA CAMTSCHATICUM. 55 



by Forbes ; unfortunately, the name Circe had already been applied to 

 a genus of Mollusks, before Brandt proposed it in 1838, and we have 

 therefore retained the name of Gegenbaur. Gegenbaur placed these 

 Medusae in the vicinity of the Eucopidse ; but a close examination of 

 their characters, to which I have already referred when speaking of 

 Campanella, leads us to remove them as well as the AglauridsB, 

 Geryonida?, and Leuckartidse to the Discophorse Haplostomeae, as a 

 separate suborder closely allied to the ^Eginidae. Dr. Fritz Miiller, 

 to whom I had suggested the probability of Circe being the adult of 

 Trachynema, says, in one of his letters, that he has found Trachynema 

 near Desterro ; " in consequence of this, it is highly probable that they 

 are the young of Tamoia, never having met with Circe on our coast." 

 If this should prove to be the case, we have a very strong argument 

 in favor of joining the Trachynemidse (Circeans) with the Discophorse. 



Family TRACHYNEMIDSE Gegenb, 



Trachynemidce GEGEXB. Zeit. f. Wiss. Zool., VIII. p. 249. 1856. 

 Circeidce FORBES. Brit. Naked-eyed Medusas, p. 34. 1848. 

 Circeidce AGASS. Cont. Nat. Hist. U. S., IV. p. 348. 1862. 

 Trachynemidce AGASS. Cont. Nat. Hist. U. S., IV. p. 365. 1862. 



TRACHYNEMA GEGENB. 



TracJiynema GEGEXB. Generationswechsel, p. 50. 1854. 



Circe MERTEXS. Br. Me'm. Acad. St. Petersb., p. 219. 1835. (Preoccupied in Moll.) 



Circe FORBES. Brit. Nak. Medusae, p. 34. 1848. 



Circe LESS. Zooph. Acal., p. 285. 1843. 



Circe AGASS. Cont. Nat. Hist. U. S., IV. p. 348. 1862. 



Trachynema camtschaticum A. AGASS. 



Circe camtschatica BR. Me'm. Acad. St. Pet., p. 354, PI. I. Figs. 1-5. 1838. 

 Circe camtschatica AGASS. Cont. Nat. Hist. U. S., IV. p. 348. 1862. 

 Circe camtschatica LESS. Zooph. Acal., p. 285. 1843. 

 Circe impatiens AGASS. Cont. Nat. Hist. U. S., IV. p. 349. 1862. 



A few specimens of this beautiful little jelly-fish (Fig. 76) were 

 caught on the shores of Galiano Island, in the Gulf of Georgia, W. T. 

 The greatest diameter is situated on a level with the point of suspen- 

 sion of the ovaries. The ovaries are flat, triangular-shaped (Fig. 77), 

 the chymiferous tubes very slender. The solid prolongation of the 

 abactinal portion of the spherosome, which extends, in the Eastern 

 species, to a short distance of the actinostome, is much shorter (Fig. 

 78) ; the chymiferous cavity is especially long, and extends to the 



