OF CONCHOLOGY. 



257 



DESCRIPTIONS OF NEW GENERA AND SPECIES OP MIO- 

 CENE SHELLS, W^ITH NOTES ON OTHER FOSSIL AND 

 RECENT SPECIES. 



BY T. A. CONKAD. 



CYLICHNA, Forbes and Hanley. 



C. VIRGINICA, Conrad. — PL 21, fig. 2. 



Description. — Narrow-cylindrical ; shoulder slightly rounded ; 

 spire slightly prominent, sides straight ; apex exserted ; labrum 

 slightly contracted or nearly straight in the middle; aperture 

 gradually widening from the summit; columellar plait distinct and 

 rather thick. 



Locality. — Virginia. 



Observation. — This is a narrow, more graceful species in out- 

 line than Q. cylindraeea {Tornatina) Emmons, a Miocene species 

 of N. Carolina. Say has described a recent species, C. canalicu- 

 lata [Bullina) Say. 



ZIZYPHINUS, Leach, Gray, 1840. 



Calliostoma, Swainsoii; 1840. 



Z. PUNCTATUS, Conrad — PI. 21, fig. 5. 



Description. — Depressed-conical ; periphery rounded ; base 

 slightly convex ; umbilicus small, minutely carinated on the 

 margin ; whorls 5, with straight sides ; body whorl slightly con- 

 cave laterally ; spire equal to base ; shell Avith unequal impressed, 

 punctate lines. 



Locality. — Virginia ? 



The specimen described is in the cabinet of the Smithsonian 

 Institution. 



