A Manual of Conchology / According to the System Laid Down by Lamarck, with the Late Improvements by De Blainville. Exemplified and Arranged for the Use of Students.

by Thomas Wyatt

C. sublævigata.

C. corbularis.

C. lithophagella.

C. crassicosta. The thick-ribbed Cardita.

Species elongated, a little gaping at the inferior margin; ligament concealed.

C. sulcata. The furrowed Cardita. Pl. [10], fig. 3.

Sub-cordiform or oval, more transverse than longitudinal; colour white, tesselated with brown; posterior depression heart-shaped; longitudinal, convex, transversely-striated ribs.

3. Cypricardia. Four species.

Distinguished from the Cardita by having three teeth beneath the apices, and a callous lengthened tooth or ridge.

Shell obliquely elongated, equivalve, inequilateral; valves striated, but never ribbed; hinge with three teeth beneath the umbo, and one lateral elongated tooth.