Clavilithes conjunctus (FOSSIL) (G.P. Deshayes, 1837 †)
Clavilithes conjunctus rotundatus (FOSSIL) Klushnikov, 1958 † Ukraine42 mm
Fusinus consetti (T. Iredale, 1929) Australia, Sydney
Granulifusus consimilis T.A. Garrard, 1966 China, Zhejiang56 mm
Latirus constrictus (F.C.L. Koch, 1845) Philippines, Masbate Island52 mm
Euthriofusus convexus (FOSSIL) B. Wade, 1926 † USA, Tennessee, McNairy
Fusinus corallinus P. Russo & Germanà, 2014
Fusolatirus coreanicus (E.A. Smith, 1879) China, Zhejiang31 mm
Australaria coronata (J.B.P.A. Lamarck, 1822) Australia, Montague island
Lepidocolus corrugata (FOSSIL) (P. Marshall, 1918 †)
Clavilithes cossmanni (FOSSIL) E.W. Vredenburg, 1923 † Myanmar, Magway, Thayetmyo
Clavilithes costarius (FOSSIL) (G.P. Deshayes, 1835 †) France, Paris Basin
Leucozonia costata (FOSSIL) (W.H. Dall, 1890 †) Florida
Buccinofusus costiferum (FOSSIL) (Wood, 1848 †) UK, England, Norfolk
Fusinus couei (S.A.A. Petit De La Saussaye, 1853) Mexico, Yucatan80 mm
Peristernia coxi (FOSSIL) A. Dey, 1961 † India, Kerala, Kollam
Streptochetus crassicostatus (FOSSIL) (G.P. Deshayes, 1835 †) France, Paris Basin
Fusinus crassiplicatus T. Kira, 1959 Japan, Wakayama94,3 mm
Fusinus crassisculptus (FOSSIL) (A.H.E. Beyrich, 1856 †) Kazakhstan
Latirus crassus (FOSSIL) (E. Sismonda, 1842 †) France, Aquitaine
Latirus crassus vindobonensis (FOSSIL) M. Csepreghy, 1956 † Hungary, Börzsöny34 mm
Turrilatirus craticulatus (C. Linnaeus, 1758) Philippines, Cebu68 mm
Fusus craticulatus G.B. Brocchi, 1814
Fusinus cratis R.N. Kilburn, 1973 Mozambique143 mm
Peristernia cremnochione J.C. Melvill, 1891 Mauritius
Fusinus cretellai G. Buzzurro & P. Russo,2008 Morocco, Tanger23 mm
Pleuroploca cristata (FOSSIL) R. Tate, 1888 † Australia, Victoria
Peristernia crocea (J.E. Gray, 1839) Fiji Islands36,1 mm
Pleuroploca cryptoploca (FOSSIL) R. Tate, 1888 † Australia, Victoria, S. Grampians Bal
Hemipolygona cuna (E.J. Petuch, 1990) Honduras, Roatan Island17 mm
Bellifusus curvicostatus (FOSSIL) (B. Wade, 1926 †) USA, Mississippi
Piestochilus curviliratus (FOSSIL) (T.A. Conrad, 1858 †) USA, Mississippi, Tippah
Fasciolaria curvirostris (W. Wood, 1828)
Fusus cuvirostris (FOSSIL) Wood, 1828 †
Clavilithes cylindricus (FOSSIL) Wrigley † UK, England, Hampshire61 mm