Calyptraea centralis T.A. Conrad, 1841
Crepidula cerithicola C.B. Adams, 1852
Calyptraea cestasensis (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1921 †
Crepipatella charybdis S.S. Berry, 1940
Calyptraea chinensis (C. Linnaeus, 1758)
Calyptraea chinensis squamulata (C. Linnaeus, 1758)
Crepidula chinensis J.E. Gray, 1867
Crucibulum chipolanum (FOSSIL) W.H. Dall, 1892 †
Crucibulum chipolanum dodoneum (FOSSIL) J. Gardner, 1937 †
Calyptraea chlorina A.A. Gould, 1846
Crepidula cochlearis (FOSSIL) B. de Basterot, 1825 †
Grandicrepidula collinae B.A. Marshall, 2003
Trochita collinsii (FOSSIL) W.M. Gabb, 1881 †
Crepidula complanata C.F.F. von Krauss, 1848
Crucibulum concameratum L.A. Reeve, 1859
Calyptraea concentrica (Lea, 1843)
Calyptraea conica W.J. Broderip, 1834
Calyptraea conradi (FOSSIL) McNeil, 1984 †
Dispotaea constricta (FOSSIL) T.A. Conrad, 1842 †
Dispotaea constricta conjuge (FOSSIL) Gardner, 1947 †
Calyptraea contorta P.P. Carpenter, 1865
Crepidula convexa T. Say, 1822
Calyptraea cooksoniae (FOSSIL) (Seeley, 1861 †)
Crepidula coquimbensis D.I. Brown & Olivares,1996
Calyptraea corrugata (FOSSIL) E. Forbes, 1846 †
Trochita costaria (FOSSIL) (J.P.S. Grateloup,1827 †)
Dispotaea costata (FOSSIL) (T. Say, 1820 †)
Maoricrypta costata (G.B. I Sowerby, 1824)
Maoricrypta costata chamnessi E.J. Petuch, 1994
Calyptraea crassa (FOSSIL) R. Tate, 1893 †
Calyptraea crassiuscula (FOSSIL) J.P.S. Grateloup, 1827 †
Trochita crenata (FOSSIL) Gardner, 1947 †
Calyptraea crepidularis (FOSSIL) J.B.P.A. Lamarck, 1802 †
Thylacus cretaceus (FOSSIL) T.A. Conrad, 1860 †
Crucibulum cubaguaense (FOSSIL) B.M. Landau & F. Da Silva,2010 †