Amauropsis brassiculina (É.A.A. Locard, 1897)
Euspira briarti (FOSSIL) A. von Koenen, 1885 †
Natica broderipiana C.A. Récluz, 1844
Natica brunneolinea J.H. McLean, 1970
Natica buccinoides (FOSSIL) d'Orbigny, 1842 †
Natica bulbulus (FOSSIL) White, 1887 †
Natica burdigalensis (FOSSIL) C. Mayer, 1864 †
Natica buriasiensis C.A. Récluz, 1844
Natica buriasiensis atypha R.B. Watson, 1881
Tectonatica burtoni (FOSSIL) E. Robba, Pedriali& E. Quaggiotto, 2016 †
Tectonatica burtoni altavillensis (FOSSIL) E. Robba, Pedriali& E. Quaggiotto, 2016 †
Natica cabrerai T. Kase & Y. Shigeta,2000
Natica caillati (FOSSIL) G.P. Deshayes, 1864 †
Natica callosa G.A. Scopoli, 1777
Natica callosior (FOSSIL) Martin, 1879 †
Amauropsis caloramans (FOSSIL) C.J. Maury, 1912 †
Neverita calvimontana (FOSSIL) G.P. Deshayes, 1864 †
Gyrodes canadensis (FOSSIL) J.J.F. Whiteaves, 1903 †
Polinices canalis (FOSSIL) E.W.J. Moore, 1963 †
Natica canalizonalis (FOSSIL) J. Brown & H.A. Pilsbry,1913 †
Natica canariensis N.H. Odhner, 1932
Stigmaulax cancellatus (J. Hermann, 1781)
Polinices candidissimus (E.J. Le Guillou, 1842)
Natica candidula E.A. Smith, 1895
Natica caneloensis L.G. Hertlein & A.M. Strong,1955
Naticarius canrena (C. Linnaeus, 1758)
Naticarius canrena antinacca (FOSSIL) A.E.M. Cossmann, 1924 †
Naticarius canrena verae H.A. Rehder, 1947
Mammilla caprae R.A. Philippi, 1850
Sigatica caractica (FOSSIL) J. Gardner, 1937 †
Falsilunatia carcellesi (R.K. Dell, 1990)
Sinum carolanum (FOSSIL) E.M. Spieker, 1922 †
Sigatica carolinensis W.H. Dall, 1889
Polinices caroliniana (FOSSIL) (T.A. Conrad, 1841 †)
Benthobulbus carpenteri (W.H. Dall, 1896)