Metulella columbellata (W.H. Dall, 1889)
Atilia columbelloides (FOSSIL) (B. de Basterot, 1825 †)
Amphissa columbiana W.H. Dall, 1916
Zafra columnaria W.L. May, 1916
Anachis cominellaeformis (R. Tate, 1892)
Seminella comistea (J.C. Melvill, 1906)
Astyris communis (FOSSIL) T.A. Conrad, 1862 †
Liratilia compta A.W.B. Powell, 1930
Indomitrella concalis K. Monsecour & D. Monsecour,2016
Mitrella condei E. Rolán, 2005
Columbella confertilirata K.H. Barnard, 1959
Mitrella confusa K. Monsecour & A.M. Dekkers,2013
Liratilia conquisita (H.H. Suter, 1907)
Liratilia conquisita chathamensis R.K. Dell, 1956
Decipifus consanguineus (G.B. III Sowerby, 1897)
Decipifus consanguineus langleyi (G.B. III Sowerby, 1897)
Decipifus consanguineus sculpturatus (W.H. Turton, 1932)
Decipifus consanguineus whitechurchii (W.H. Turton, 1932)
Indomitrella conspersa (J.S. Gaskoin, 1851)
Nassarina conspicua (C.B. Adams, 1852)
Mitrella constricta J.T. Kuroda, 1928
Anachis constrictocanalis K. Monsecour & D. Monsecour,2016
Zemitrella contigua A.W.B. Powell, 1940
Antimitrella convexa Lussi, 2017
Macrozafra cophinodes (H.H. Suter, 1908)
Anachis coronata (G.B. I Sowerby, 1832)
Seminella corrugata K. Monsecour & D. Monsecour,2016
Anachis coseli J.M. Díaz & Mittnacht,1991
Mazatlania cosentini (R.A. Philippi, 1836)
Columbella costa L.R.L. Simone, 2007
Lirastrombina costaricensis (FOSSIL) (A.A. Olsson, 1922 †)
Astyris costata V.V. Gulbin, 1983
Cosmioconcha costattenuata J. Pelorce, 2017
Anachis costellata (W.J. Broderip& G.B. I Sowerby, 1829)
Sincola crassilabrum (FOSSIL) (R.J.L. Guppy, 1874 †)