Pseudoaluco clarki (FOSSIL) K.V.W. Palmer, 1953 † Florida, Levy County11,7 mm
Pseudovertagus clava (J.F. Gmelin, 1791) French Polynesia, Tahiti116 mm
Cerithium claviforme M.M. Schepman, 1907 Marshall Islands, Kwajalein Atoll32 mm
Fastigiella climacina (FOSSIL) A.E.M. Cossmann& G. Pissarro † France, Normandy22 mm
Cerithium clypeus (FOSSIL) W.H. Hudleston, 1889 † UK, England, Gloucestershire
Bittium coislinense (FOSSIL) A.E.M. Cossmann, 1897 † France, Brittany
Cerithium coloradense (FOSSIL) Stanton, 1947 † Texas, Austin17 mm
Cerithium columna G.B. I Sowerby, 1834 Philippines, Negros Island37 mm
Cerithium columna fusiforme G.B. II Sowerby, 1855 Philippines, Mactan Island23,3 mm
Cerithium columna sandwichensis L.A. Reeve, 1865 Hawaii31 mm
Cerithium columna sculptum W.H. Pease, 1869 Mexico, Sonora20,2 mm
Cerithium commaoides (FOSSIL) W.H. Hudleston, 1889 † UK, Northamptonshire
Cerithium confusum (FOSSIL) Tate, 1875 † UK, England, Oxfordshire
Texmelanatria contracta (FOSSIL) Garvie, 2013 † Texas, Bastrop County62 mm
Cerithium coralium (L.C. Kiener, 1841) Philippines, Samar Island32 mm
Clypeomorus coralius (Dufresne, 1842)
Cerithium coronatum (FOSSIL) Moore † UK, England, Somerset
Rhinoclavis corpulens (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1922 † France, Normandy19 mm
Cerithium corvinum (FOSSIL) (A. Brongniart, 1862 †) Hungary
Serratocerithium cossmanni (FOSSIL) R. Charpiat, 1919 † France, Paris Basin
Hemicerithium cossmanni (FOSSIL) (W.H. Dall, 1892 †) Florida18 mm
Rhinoclavis costaricana (FOSSIL) A.A. Olsson, 1922 † Costa Rica36 mm
Cerithium costaricensis (FOSSIL) A.A. Olsson, 1922 † Costa Rica, Pueblo Nuevo
Cerithium costulatum (FOSSIL) J.B.P.A. Lamarck, 1889 † France, Brittany21 mm
Bittium courtillerianum (FOSSIL) (Millet, 1865) †
Exechocirsus cowickeensis (FOSSIL) N.F. Sohl, 1964 † USA, Mississippi
Colina coxi (FOSSIL) Abbass, 1967 † Egypt, Fayium
Bittium crassicostatum (FOSSIL) (Etheridge & Bell,1898) †
Tenuicerithium crassicostatum (FOSSIL) (G.P. Deshayes, 1864 †) France, Brittany
Cerithium crassilabrum C.F.F. von Krauss, 1848 South Africa17 mm
Hemicerithium craticulum (FOSSIL) R.C. Hoerle, 1972 † United States, Florida, Calhoun
Cerithium crenatum (FOSSIL) G.B. Brocchi, 1814 † Hungary, Börzsöny59 mm
Cerithium crenatum procrenatum (FOSSIL) F. Sacco, 1895 † Bulgaria29 mm
Cerithium crenulatum (FOSSIL) G.P. Deshayes † France, Brittany11 mm
Cerithium cribaroyes (FOSSIL) Author unknown † Australia, Victoria35 mm