OF CONCHOLOGY. 41 



CRASSATELLIDuE. 



CRASSATELLA, Lam. 



C. LiTTORALis, Conrad. — PI. 1, fig. 3. 



Description. — Subovate, inequilateral, convex, anterior margin 

 regularly rounded ; posterior end truncated, direct ; ventral 

 margin curved ; surface sculptured by numerous impressed lines, 

 obsolete posteriorly ; inner margin minutely crenukted. (Cast.) 



Locality. — Shark River, N. J. 



CRASSINA? Lam. 



C. ? VETA, Conrad. — PI. 1, fig. 5. 



Description. — Triangular, inequilateral, convex ; posterior 

 dorsal margin straight and oblique : anterior extremity angular 

 and situated much above the line of the ventral margin, which is 

 crenulated within ; cardinal pit under the apex of the left valve, 

 triangular, wide, oblique. (Cast). 



Locality. — Shark River, N. J. 



BUOARDLLDM. 



BUCARDIA. 



B. VETA, Conrad.— PI. 1, fig. 2. 



Description. — Rounded, inequilateral, profoundly ventricose ; 

 summits prominent, rounded ; anterior margin obtusely rounded ; 

 posterior and ventral margins forming a nearly regular curve. 



Locality. — Shark River, N. J. 



CARYATIS, Romer. 



C. Delawarensis, Gabb. — PI. 1, fig. 6. 



Description. — Subovate, ventricose, very inequilateral, umbo 

 and beaks oblique ; posterior hinge margin oblique and slightly 

 curved ; posterior end obtusely rounded. 



Locality. ^^\\div\. River, N. J. 



I referred this cast erroneously to Cyprina Morrissii, but for- 

 tunately I obtained a mould of the hinge which proves it to be 

 a Caryatis. 



