Metulella columbellata (W.H. Dall, 1889) Florida
Atilia columbelloides (FOSSIL) (B. de Basterot, 1825 †) France, Aquitaine
Amphissa columbiana W.H. Dall, 1916 USA, Washington28 mm
Zafra columnaria W.L. May, 1916 Tasmania
Anachis cominellaeformis (R. Tate, 1892) Australia, Yorke Peninsula9 mm
Seminella comistea (J.C. Melvill, 1906) Gulf of Oman3,8 mm
Astyris communis (FOSSIL) T.A. Conrad, 1862 † USA, Maryland
Liratilia compta A.W.B. Powell, 1930 New Zealand, North Island4,7 mm
Indomitrella concalis K. Monsecour& D. Monsecour, 2016
Mitrella condei E. Rolán, 2005 Angola16,5 mm
Columbella confertilirata K.H. Barnard, 1959 South Africa
Mitrella confusa K. Monsecour& A.M. Dekkers, 2013 Philippines, Aliguay Island13,6 mm
Liratilia conquisita (H.H. Suter, 1907) New Zealand
Liratilia conquisita chathamensis R.K. Dell, 1956 New Zealand
Decipifus consanguineus (G.B. III Sowerby, 1897) South Africa6 mm
Decipifus consanguineus langleyi (G.B. III Sowerby, 1897) South Africa, Jeffreys Bay4,1 mm
Decipifus consanguineus sculpturatus (W.H. Turton, 1932) South Africa, Jeffreys Bay4,2 mm
Decipifus consanguineus whitechurchii (W.H. Turton, 1932) South Africa, Shelly Beach2 mm
Indomitrella conspersa (J.S. Gaskoin, 1851) Philippines, Olango Island11 mm
Nassarina conspicua (C.B. Adams, 1852) West America
Mitrella constricta J.T. Kuroda, 1928 Japan
Anachis constrictocanalis K. Monsecour& D. Monsecour, 2016
Zemitrella contigua A.W.B. Powell, 1940 New Zealand4,2 mm
Antimitrella convexa Lussi, 2017
Macrozafra cophinodes (H.H. Suter, 1908) New Zealand
Anachis coronata (G.B. I Sowerby, 1832) Mexico, Sonora16 mm
Seminella corrugata K. Monsecour& D. Monsecour, 2016
Anachis coseli J.M. Díaz & Mittnacht,1991 Venezuela13,5 mm
Mazatlania cosentini (R.A. Philippi, 1836) Martinique15 mm
Columbella costa L.R.L. Simone, 2007 Brazil. Rio de Janeiro19 mm
Lirastrombina costaricensis (FOSSIL) (A.A. Olsson, 1922 †) Costa Rica
Astyris costata V.V. Gulbin, 1983
Cosmioconcha costattenuata J. Pelorce, 2017 French Guiana
Anachis costellata (W.J. Broderip& G.B. I Sowerby, 1829) Ecuador11,8 mm
Sincola crassilabrum (FOSSIL) (R.J.L. Guppy, 1874 †) Colombia, La Chorrera