OF CONCHOLOGY. 13 



CARDITID^.. 



CARDITAMERA, Conrad. 



C. ACULEATA, Conrad.- — PI. 4, fig. 5. 



Description. — -Trapezoidal, inequilateral; umbonal slope 

 ventricose; base emarginate in the middle; disk contracted 

 in the middle; ribs very large over the umbonal slope; an- 

 terior ribs crenulated ; the larger ribs and the dorsal sub-margin 

 with prominent scales. 



Locality. — Shiloh, Cumberland Co., N. J. 



I found one valve only, of this small and distinct species. 



MYTILIDiE. 

 LITHOPHAGA, Bolten. 

 L. SUBALVEATA, Conrad. — PI. 4, fig. 4. 



Description. — Oblong, very thin and fragile, ventricose, pos- 

 terior side produced, a slight wide furrow marks the umbonal 

 slope, on and behind which are concentric grooves and lines; 

 basal margin slightly emarginate or contracted. 



Locality. — Shiloh, Cumberland Co., N. J. 



A single specimen was found penetrating the shell of Ostrea 

 perorassa, Conrad. 



