Cardita Carolinensis

Carditia Carolinensis, Conrad Proc. Ac. Nat. Sc. Vol 3 p 297

Suborbicular? profoundly ventricose, with about thirty very prominent square radii, on the anterior side sharp, recurved and crenulated; lunule very broad and cordate, deeply impressed; hinge thick; pit anterior to the cardinal tooth small and profound. L 0.6

Eocene Tertiary
St. Mathews Parish S.C.