PELECYPODA—PRIONODESMACEA. 499 



New Jersey (Red Bank and Tinton) ; also Alabama, Mississippi, 

 Arkansas, Texas. 

 370. P. quinquenarius Conrad. (Fig. 670.) Cretacic. 



Fig. 667. Pecten conradi ; enlarged. (N. J. Pal. ,1.) 



Fig. 668. Pecten conradi, enlargement of surface. (N. J. Pal., I.) 



Right valve flat ; left convex. Surface bearing 5 or 6 broad 

 ill-defined radiating ribs. 



New Jersey (Wenonah and Navesink), Mississippi. 



Fig. 669. Pecten simplicius ; enlarged. (N. J. Pal., I 



371. P. burlingtonensis Gabb. (Fig. 671.) Cretacic. 



Right valve nearly flat ; left valve depressed-convex. Surface 



•of each valve crossed by concentric bands continuous across the 



Fig. 670. Pecten quinquenarius, a small right valve. (N. J. Pal., I.) 

 FlG. 671. Pecten burlingtonensis. (N. J. Pal., I.) 



nearly equal ears, and marked with very fine radiating striae. 

 Large shells have a height of over two inches. 



New Jersey (Merchantville- Wenonah), more common in former. 



