Botelloides chrysalidus (A.C. Chapman& C.J. Gabriel, 1914) South Australia
Botelloides chrysalidus kendricki W.F. Ponder, 1985 Western Australia
Gibbula cicer (K.T. Menke, 1844) South Africa, Algoa Bay8 mm
Monodonta cincta (FOSSIL) Klipstein, 1843 † Italy, Trentino-Alto Adige, Bolzano
Gibbula cineraria (C. Linnaeus, 1758) France, Brittany12 mm
Gibbula cineraria strigosa (J.F. Gmelin, 1791) Morocco, cap Cantin36,3 mm
Leiopyrga cingulata (A. Adams, 1864) Australia, Keppel Bay8 mm
Gibbula clandestina E. Rolán & J. Templado,2001 Cape Verde2,5 mm
Clanculus clanguloides Wood, 1828 Okinawa12 mm
Clanculus clangulus (W. Wood, 1828) Australia, Sydney11,8 mm
Pseudostomatella clathratula (A. Adams, 1854)
Cantharidoscops clausus (A.N. Golikov& V.V. Gulbin, 1978) Japan
Pseudominolia climacota (J.C. Melvill, 1897) Pakistan
Pseudostomatella coccinea (A. Adams, 1850) Grenada
Monilea cocoa T.A. Okutani, 2001
Gibbula coeni H.B. Preston, 1908 Andaman Islands
Trochus coerulescens J.B.P.A. Lamarck, 1822
Clanculus cognatus (H.A. Pilsbry, 1903) Philippines, Balicasag Island17,3 mm
Piscoacritia collapsa (FOSSIL) DeVries & Hess, 2004 † Peru, Huacllaco
Halistylus columna W.H. Dall, 1890 Uruguay6 mm
Clanculus comarilis C. Hedley, 1912 Australia, Broome15 mm
Charisma compacta C. Hedley, 1915 Australia, Sydney3 mm
Thalotia comptessi T. Iredale, 1931 Australia
Calthalotia comtessi (T. Iredale, 1931)
Diloma concamerata (W. Wood, 1828) South Australia21,6 mm
Infundibulum concavum (J.F. Gmelin, 1791) Réunion45 mm
Infundibulum concentricum (FOSSIL) Lea, 1843 †
Gibbula concinna H.A. Pilsbry, 1890
Synaptocochlea concinna (Gould, 1845) Guam6 mm
Synaptocochlea concinna inconcinna (H.A. Pilsbry,1920, 1921) Hawaii
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 South China Sea29 mm
Thalotia conica (Gray, 1827) Australia, Edithburgh19 mm