EXPLANATION OF PLATE LXV. 



CARDIUM UNIFORMIS n. sp., P- 5$ 



1-2. Lateral and posterior views of a very perfect internal cast. 

 3. Squeeze taken from a portion of the natural external mould 

 of the same. 



Woodbury clay; Lorillard, (102). 



CARDIUM RIPLEYANUM Conrad,. P- 582- 



4-5. Posterior and lateral views of a complete internal cast, 



(X2). 



6. Lateral view of another internal cast, (xa). 

 Woodbury clay; Lorillard, (102}. 



CARDIUM DUMOSUM Conrad, p. 59<> 



7-8. The incomplete cast of a left valve and a squeeze taken from 



the natural mould of the exterior of the same. 

 9. Lateral view of a small, very perfect internal cast. 

 10. The same (x2). 



Woodbury clay; Lorillard, (102). 



CARDIUM PILSBRYI n. sp., p. 594 



11-12. Lateral views of two internal casts, a left valve and a right 

 valve. 



Merchantville clay-marl; Lenola, (163). 



CARDIUM TBNUISTRIATUM (Whitfield), .p. 591 



13. View of the type specimen. 



Wenonah sand; near Marlboro. 



14. View of a squeeze from a natural mould of the exterior, to 



show the character of the surface markings. 



Merchantville clay-marl; Lenola, (/6j). 

 15-16. Lateral and posterior views of a nearly perfect internal cast. 



Merchantville clay-marl; Lenola, (163). 

 17. A right valve partially preserving of the shell. 



Marshalltown clay-marl; near Swedesboro, (177). 

 18-19. Anterior and lateral views of a nearly perfect internal cast. 

 Marshalltown clay-marl; Marshalltown, (/po). 



CARDIUM TRIUJNEATUM n. sp., p. 589 



20. A squeeze from a natural mould of the exterior, showing the 



character of the surface markings. 



Navesink marl; Atlantic Highlands, (io8~). 



PROTOCARDIUM JERSEYENSIS n. sp., p. 596- 



21. The internal cast of a right valve, (x2). 



Merchantville clay-marl; near Jamesburg, (140). 



