Botelloides chrysalidus (A.C. Chapman& C.J. Gabriel, 1914)
Botelloides chrysalidus kendricki W.F. Ponder, 1985
Gibbula cicer (K.T. Menke, 1844)
Monodonta cincta (FOSSIL) Klipstein, 1843 †
Gibbula cineraria (C. Linnaeus, 1758)
Gibbula cineraria strigosa (J.F. Gmelin, 1791)
Leiopyrga cingulata (A. Adams, 1864)
Gibbula clandestina E. Rolán & J. Templado,2001
Clanculus clanguloides Wood, 1828
Clanculus clangulus (W. Wood, 1828)
Pseudostomatella clathratula (A. Adams, 1854)
Cantharidoscops clausus (A.N. Golikov& V.V. Gulbin, 1978)
Pseudominolia climacota (J.C. Melvill, 1897)
Pseudostomatella coccinea (A. Adams, 1850)
Monilea cocoa T.A. Okutani, 2001
Gibbula coeni H.B. Preston, 1908
Trochus coerulescens J.B.P.A. Lamarck, 1822
Clanculus cognatus (H.A. Pilsbry, 1903)
Piscoacritia collapsa (FOSSIL) DeVries & Hess, 2004 †
Halistylus columna W.H. Dall, 1890
Clanculus comarilis C. Hedley, 1912
Charisma compacta C. Hedley, 1915
Thalotia comptessi T. Iredale, 1931
Calthalotia comtessi (T. Iredale, 1931)
Diloma concamerata (W. Wood, 1828)
Infundibulum concavum (J.F. Gmelin, 1791)
Infundibulum concentricum (FOSSIL) Lea, 1843 †
Gibbula concinna H.A. Pilsbry, 1890
Synaptocochlea concinna (Gould, 1845)
Synaptocochlea concinna inconcinna (H.A. Pilsbry,1920, 1921)
Eurytrochus concinnus (H.A. Pilsbry, 1890)
Trochus concinnus R.A. Philippi, 1846
Jujubinus condevicnumensis (FOSSIL) B.M. Landau, L. Ceulemans& F. Van Dingenen, 2016 †
Monodonta confusa C.M. Tapparone-Canefri,1874
Thalotia conica (Gray, 1827)