TRACHYNEMA CAMTSCHATICUM. 55 



bv Forbes ; imfortunutely. tbo name Ciroe bad ab-ciidy 1)ih'ii api)Hc'd to 

 a genus of MoUusks, before Biandt proposed it in 1838, and we bave 

 therefore retained the name of Gegenbaur. Gegenbaur placed these 

 Medusje in the vicinity of the Eucopidaj ; 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 Aglaurida?, 

 Geryonida?, and Leuckartidtu — to the Discophoraj Haplostomea?, as a 

 separate suborder closely allied to the ^Eginida?. Dr. Fritz Mliller, 

 to whom I had suggested the proljability 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 joinmg the Trachyneniidaj (Circeans) with the Discophora?. 



Family TRACHYNEMIDiE] Gegenb. 



Tnir/ii/ncmithe Gegexh. Zeit. t'. Wiss. Zool., VIII. p. 249. 1«56. 

 Circriilce Forbes. Brit. Naked-eyed Medusa;, p. 34. 1848. 

 CircdtkK Agass. Cont. Nat. Hist. U. S., IV. p. 348. 1802. 

 Trachyiiemidce Agass. Cont. Nat. Hist. U. S., IV. p. 365. 1862. 



TRiVCHYNEMA Gegenb. 



Trachynema GEOESn. Generatlonsweclisel. p. 50. 1854. 



Circe Meutens. I5r. IMe'ni. Acad. St. Petersb., p. 219. 1835. (Preoccupied in Moll.) 



Circe Forbes. Brit. Nak. Meduste, p. 34. 1848. 



Circe Less. Zoopli. Aeal., i>. 285. 1843. 



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



Trachynema camtschaticum A. Agass. 



Circe camtschalica V>n. Mem. Acail. St. Pet., p. 354, PI. I. Figs. 1-5. 1838. 

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

 Circe camtscliatica Less. Zoopli. Acal., p. 285. 1843. 

 Circe impalieus Agass. Cont. Nat. Hist. U. S., IV. p. 349. 18C2. 



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 Hat, triangular-shaped (Fig. 77), 

 the chymiferous tul)es very sliMider. The solid prolongation of the 

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

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

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



