Calyptraea centralis T.A. Conrad, 1841 Belize15 mm
Crepidula cerithicola C.B. Adams, 1852 Panama
Calyptraea cestasensis (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1921 † France, Aquitaine19 mm
Crepipatella charybdis S.S. Berry, 1940 Cape Verde
Calyptraea chinensis (C. Linnaeus, 1758) Italy, Cannizzaro25 mm
Calyptraea chinensis squamulata (C. Linnaeus, 1758) France, Brittany11,9 mm
Crepidula chinensis J.E. Gray, 1867 Spain16 mm
Crucibulum chipolanum (FOSSIL) W.H. Dall, 1892 † Florida26 mm
Crucibulum chipolanum dodoneum (FOSSIL) J. Gardner, 1937 † Florida7 mm
Calyptraea chlorina A.A. Gould, 1846 Cape Verde
Crepidula cochlearis (FOSSIL) B. de Basterot, 1825 † France, Aquitaine24 mm
Grandicrepidula collinae B.A. Marshall, 2003 New Zealand, Poor Knights Islands
Trochita collinsii (FOSSIL) W.M. Gabb, 1881 †
Crepidula complanata C.F.F. von Krauss, 1848 South Africa
Crucibulum concameratum L.A. Reeve, 1859 Panama19,8 mm
Calyptraea concentrica (Lea, 1843) Florida12,5 mm
Calyptraea conica W.J. Broderip, 1834 Costa Rica23 mm
Calyptraea conradi (FOSSIL) McNeil, 1984 † USA, Mississippi
Dispotaea constricta (FOSSIL) T.A. Conrad, 1842 † Florida
Dispotaea constricta conjuge (FOSSIL) Gardner, 1947 † Florida18 mm
Calyptraea contorta P.P. Carpenter, 1865 France, Brittany
Crepidula convexa T. Say, 1822 New York. Long Island15 mm
Calyptraea cooksoniae (FOSSIL) (Seeley, 1861 †) UK, Cambridgeshire
Crepidula coquimbensis D.I. Brown & Olivares,1996 Chile, Coquimbo
Calyptraea corrugata (FOSSIL) E. Forbes, 1846 †
Trochita costaria (FOSSIL) (J.P.S. Grateloup,1827 †) France, Aquitaine30 mm
Dispotaea costata (FOSSIL) (T. Say, 1820 †) South Carolina31 mm
Maoricrypta costata (G.B. I Sowerby, 1824) New Zealand, Bay of Islands35,2 mm
Maoricrypta costata chamnessi E.J. Petuch, 1994 South Carolina20 mm
Calyptraea crassa (FOSSIL) R. Tate, 1893 † South Australia
Calyptraea crassiuscula (FOSSIL) J.P.S. Grateloup, 1827 † France, Aquitaine59 mm
Trochita crenata (FOSSIL) Gardner, 1947 † USA, North Carolina
Calyptraea crepidularis (FOSSIL) J.B.P.A. Lamarck, 1802 † France, Paris Basin12 mm
Thylacus cretaceus (FOSSIL) T.A. Conrad, 1860 † Tennessee
Crucibulum cubaguaense (FOSSIL) B.M. Landau& F. Da Silva, 2010 †