Clavilithes conjunctus (FOSSIL) (G.P. Deshayes, 1837 †)
Clavilithes conjunctus rotundatus (FOSSIL) Klushnikov, 1958 †
Fusinus consetti (T. Iredale, 1929)
Granulifusus consimilis T.A. Garrard, 1966
Latirus constrictus (F.C.L. Koch, 1845)
Euthriofusus convexus (FOSSIL) B. Wade, 1926 †
Fusinus corallinus P. Russo & Germanà, 2014
Fusolatirus coreanicus (E.A. Smith, 1879)
Australaria coronata (J.B.P.A. Lamarck, 1822)
Lepidocolus corrugata (FOSSIL) (P. Marshall, 1918 †)
Clavilithes cossmanni (FOSSIL) E.W. Vredenburg, 1923 †
Clavilithes costarius (FOSSIL) (G.P. Deshayes, 1835 †)
Leucozonia costata (FOSSIL) (W.H. Dall, 1890 †)
Buccinofusus costiferum (FOSSIL) (Wood, 1848 †)
Fusinus couei (S.A.A. Petit De La Saussaye, 1853)
Peristernia coxi (FOSSIL) A. Dey, 1961 †
Streptochetus crassicostatus (FOSSIL) (G.P. Deshayes, 1835 †)
Fusinus crassiplicatus T. Kira, 1959
Fusinus crassisculptus (FOSSIL) (A.H.E. Beyrich, 1856 †)
Latirus crassus (FOSSIL) (E. Sismonda, 1842 †)
Latirus crassus vindobonensis (FOSSIL) M. Csepreghy, 1956 †
Turrilatirus craticulatus (C. Linnaeus, 1758)
Fusus craticulatus G.B. Brocchi, 1814
Fusinus cratis R.N. Kilburn, 1973
Peristernia cremnochione J.C. Melvill, 1891
Fusinus cretellai G. Buzzurro & P. Russo,2008
Pleuroploca cristata (FOSSIL) R. Tate, 1888 †
Peristernia crocea (J.E. Gray, 1839)
Pleuroploca cryptoploca (FOSSIL) R. Tate, 1888 †
Hemipolygona cuna (E.J. Petuch, 1990)
Bellifusus curvicostatus (FOSSIL) (B. Wade, 1926 †)
Piestochilus curviliratus (FOSSIL) (T.A. Conrad, 1858 †)
Fasciolaria curvirostris (W. Wood, 1828)
Fusus cuvirostris (FOSSIL) Wood, 1828 †
Clavilithes cylindricus (FOSSIL) Wrigley †