TRACHYNEJNIA CAMTSCIIATICLM. 55 



by Forbes ; uiifortunntcly, the name Circe had ah'ea(]y been apphed to 

 a genus of Molkisks, belure Brandt proposed it in 1838, and we have 

 therefore retained the name of Gegenbaur. Gegenbaur phiced these 

 Meduste m the vicinity of the Eucopidti) ; but a close examination of 

 their characters, to which T have ah'eady referred when speaking of 

 CampaneUa, leads us to remove them — as well as the Aglaurida3, 

 Geryonidi\?, and Leuckartida^ — to the Discophoni) Haplostomea^ as a 

 separate suborder closely allied to the yEginidte. Dr. Fritz Muller, 

 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 proljable 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 Trachynemida3 (Circeans) with the Discophoraj. 



Family TRACHYNEMIDiE Gegenb. 



Trachi/nemida; Gegenb. Zeit. f. Wiss. Zool., VIII. p. 249. 1856. 

 CirceklcK Forbes. Brit. Naked-eyed Medusaj, 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. 



Trachynema Gegenb. Generationswechsel, p. 50. 1854. 



Circe Mertens. Br. Mem. 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. Mem. 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 impaliens 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 



