306 IIELICID^E. 



and the lip is in contact with the preceding whorl, and 

 approaches the true Pupa. The shells of this genus are 

 all extremely graceful, and many are very delicate. 

 Numerous species have been recently described. [G.] 



1. CYLINDREL.LA PONTIFICA, GOULD. 

 PLATE LXIX. FIGURE 1. 



C. testa parva, ovata, fusiform!, attenuata, albida rufo 

 griseoque marmorata ; spira acuminata ; suturis impressis, 

 crenulatis ; anfractibus duodecim, convexis confertissirne 

 et oblique striatis ; ultimo anfractu carinato ; apertura or- 

 biculari, lateral!, campanulata, edentata ; labro acuto, mar- 

 gine sub-reflexo ; axe vix perforate. 



SYNONYMS AND EEFERENCE.?. 



Pupa poiit/fica, GOULD, Proc. Bost. Soc., III. 40. June, 1S48. 

 DESCRIPTION. 



ANIMAL whitish, translucent, a little darker above the 

 head ; body very short, terminating in a blunt extremity. 

 Superior tentacles of moderate length, of nearly equal 

 diameter throughout, terminating in a rounded bulb ; 

 lower tentacles very short, nearly rudimentary. Ocular 

 points large and black. 



SHELL fusiform, attenuated-cylindrical, whitish, or 

 grayish clouded and marbled with brown ; spire acu- 

 minate ; whorls from nine to twelve, rounded, with 

 numerous oblique, prominent strife, or ribs ; suture 

 impressed, crenulated by the extension of the alternate 



