This genus resembles the Venus, but has only two oblique cardinal teeth
on each valve.
Shell equivalve, inequilateral, sub-orbicular, sides generally with
longitudinal rayed ribs; hinge with two oblique cardinal teeth in each
valve, turned in the same direction.
_V. imbricata._ The imbricated Venericardia. Pl. 9, fig. 1.
Species almost round, having convex longitudinal ribs, covered with
imbricated rough scales; inferior margin rounded and dentated; more and
more equilateral; the two teeth short and oblique.
FAMILY X.
CARDIACEA. Five genera.