C. flexuosa.
C. macrodon.
C. lunularis.
C. squamosa.
C. lunaris.
C. cardilla.
C. cygnus.
C. dentaria.
C. Chione. The Chione Cytherea.
Thick, solid, heart-shaped, covered with a smooth brown epidermis, beneath which the shell is of a beautiful purple; radiated longitudinally, faintly wrinkled transversely, anterior cardinal tooth entire, and without a striated canal; apex turned sideways, with a cordiform depression.