EXPLANATION OF PLATE LXVI. 



CARDIUM KUMMELI n. sp., p. 585 



1. Lateral view of an incomplete right valve partially preserving 



the shell. 



2. The internal cast of a right valve. 



Tinton beds; Beers Hill Cut, (129"). 



3. External view of a perfect right valve. 



Mississippi, Coll. U. S. Nat. Mus. 



CARDIUM KNAPPI n. sp., P- 595 



4. The internal cast of a right valve. 



Vincentown sand; near Deal, (122). 



5. The internal cast of a left valve. 



Vincentown limesand; New Egypt, (143). 



6-7. Lateral and anterior views of a nearly complete internal cast. 

 Homer stown marl; near Juliustown, (160). 



FULVIA TENUIS Whitfield, p. 597 



8. View of the type specimen. 



Navesink marl; Holmdel. 



ISOCARDIA TINTONENSIS n. sp., P- 599 



9. View of the type specimen. 



Tinton beds; Beers Hill Cut, (/<?p 5 ). 



ISOCARDIA CUFFWOODENSIS Weller, p. 598 



10-11. Lateral views of two internal casts of single valves. 



Cliffwood clay; near Matawan, (186). 



12. Lateral view of an internal cast of a right valve. 



Cliffwood clay; near Matawan, (107). 



ISOCARDIA CONRADI Gabb, p. 599 



13-14. Anterior and lateral views of the type specimen. (After 

 Whitfield.) 



Vincentown limesand; Timber Creek. 



1014 



