]i6 JOUKKAL OF THE NEW JERSET 



* Shell bulging and somewhat globular, with 3 teetli or spines at the pos- 

 terior end 1- Cavolinia.. 



* Shell long^ slender, conical, gradually tapering 2. Creseis., 



1. Cavolinia, Abild. 

 Shell bulging, translucent ; aperture contracted, with a slit OU' 

 each side ; posterior extremity three-pointed. Animal with long 

 appendages to the mantle, passing through the slits of the shell :. 

 tentacles indistinct; fins united by a semicircular lorbe, repre- 

 senting the foot. 



1. Cavolinia tridentata, Forskii. (Figs. 22, 23). Body short,, 

 furnished with latera,! appendages; shell globular, thin, pellucid,, 

 yellowish, very finely striated transversely ; terminal spine 

 about" half as long as the body of the shelL — Fortieth parallel 

 and south. 



2. Vavolinia trispvnosa, Les, Shell globular, ending in a spine 

 as long as the body : lateral spines only J as long. L. 10. — 

 Whole coast. 



3. Cavolinia uncinaia^ Rang. Terminal spine but little longer 

 than the side ones, each about a third as long as the shell. L. 6. 

 — Fortieth parallel and south. 



2. Creseis. 

 Shell slender, conical, pointed, straight or slightly curved. 

 Animal with rather narrow, truncate fins with small tentacles 

 projecting from their dorsal surface. 



1. Creaeis conica, Eschscholtz. (Figs. 24, 25). Shell long, 

 slender, conical, smooth, polished, diaphanous, and slightly 

 curved towards the acute apex. L. 12 ; D. 2. Animal white :. 

 swimming organs obovate, and with two tentacles on the inner 

 front edges.— Whole extent. 



Sub-order, GYMNOSOMATA. 

 Animal naked, without mantle or shell; head distinct, swim- 

 ming lobes attached to the sides of the neck. 

 Family 36. CLIONID/E. 

 Represented only by the genus : — 



1. Clione, Pallas. 

 Head provided with two eye-tubercles and two tentacles : 

 mouth with lateral lobes ; fins ovate, attached to the sides of the 

 neck ; foot lobed. 



