Phasmoconus ciderryi (A.J. Da Motta, 1985)
Conus cinctus J.H.F. Link, 1807
Conus cinereus J.S. Schröter, 1803
Graphiconus cinereus (C.H. Hwassin J.G. Bruguière, 1792)
Conus cingulatus (FOSSIL) von Schlotheim, 1820 †
Gradiconus cingulatus (J.B.P.A. Lamarck, 1810)
Vituliconus circumactus (T. Iredale, 1929)
Pionoconus circumcisus (I. von Born, 1778)
Hemiconus clanculus (FOSSIL) C. Mayer, 1891 †
Austroconus clarus (E.A. Smith, 1881)
Africonus claudiae (M.J. Tenorio& C.M.L. Afonso, 2004)
Conus clavatulus (FOSSIL) Orbigny, 1852 †
Conus clavatulus (FOSSIL) d'Orbigny, 1852 †
Conus clavatus (FOSSIL) J.B.P.A. Lamarck, 1810 †
Conus claviformis (FOSSIL) Speyer, 1863 †
Conus clavus (FOSSIL) C. Linnaeus, 1758 †
Lamniconus clerii (L.A. Reeve, 1844)
Lautoconus cloveri (J.G. Walls, 1978)
Floraconus cocceus (L.A. Reeve, 1844)
Rubroconus coccineus (J.F. Gmelin, 1791)
Virgiconus coelinae (J.C.H. Crosse, 1858)
Leporiconus coffeae (J.F. Gmelin, 1791)
Phasmoconus collisus (L.A. Reeve, 1849)
Eremiconus colmani (D. Röckel & W. Korn,1990)
Poremskiconus colombi (E. Monnier & L. Limpalaër,2012)
Poremskiconus colombianus (E.J. Petuch, 1987)
Conus colombiensis (FOSSIL) N.E. Weisbord, 1929 †
Conus coloratus (FOSSIL) Defrance, 1818 †
Lithoconus colossus (FOSSIL) Eames, 1952 †
Conasprelloides coltrorum E.J. Petuch & B.W. Myers,2014
Fusiconus comatosa (H.A. Pilsbry, 1904)
Conus comatosaeformis (FOSSIL) M. Yokoyama, 1928 †
Conus complicatus (FOSSIL) R. Tate, 1890 †
Conus compressus G.B. II Sowerby, 1866
Conus concinnus (FOSSIL) J. de C. Sowerby, 1821 †