66 PLEIOCENE FOSSILS. 



The rounded and prominent ribs are distinctly crenulated. Pallial margin nearly 

 straight. 



This is doubtless the fossil described by Conrad, which he says "clearly resembles one 

 of the Florida coast," and it is really difficult to distinguish some forms of this species 

 from C. Florida na, Con. 



We have followed D'Orbigny in uniting Carditamera with Cardita. 



Plate XIX. Fig. 4, Exterior of left valve, natural size. 

 " 5, Interior of right valve. 



Locality. Darlington District. Museum, College of Charleston. 



CARDITA G R A N U L A T A . — S a v. 

 Plate XIX. Figs. -6^*143 1.+-X 



Venericardia granulata, Say, Jour. Ac. Nat. Sci., Vol. 4, p. 142, pi. 12, fig. 1. 

 Cardita granulata, Sag, Foss. Shells, Ter. For., p. 12, pi. 7, fig 1. 



C. testa sub-orbiculata, oblique cordata, crassa, inequilaterali, radiatim costata, concentrice 

 striata. 



Description. Shell nearly orbicular, obliquely cordate, thick, inequilateral, radiately 

 costate, concentrically striated. 



This is one of the most common fossils of the Tertiary beds of Virginia and South-Carolina. 

 It is readily distinguished by its neatly rounded outline. The anal side is rounded, with 

 a larger curve than that of the buccal side. The beaks are acute and curved forward. 

 The ribs are granulated above, and rather wrinkled towards the pallial margin. Inner 

 margin coarsely crenulated. 



Plate XIX. Fig.'j6, Interior of right valve, natural size. 

 " 7, Exterior of left valve, natural size. 



Locality. Sumter. Museum, College of Charleston. 



