Naesiotus crepundia (A.V.M.D. D'Orbigny,1835)
Scutalus cretaceus L. Pfeiffer, 1855
Newboldius crichtoni (W.J. Broderip, 1836)
Bulimus crossei L. Pfeiffer, 1862
Bostryx crucilineatus W.K. Weyrauch, 1967
Naesiotus cucullinus W.H. Dall, 1917
Mesembrinus cucullus (P.M.A. Morelet, 1849)
Drymaeus cuernavacensis P.H. Fischer& J.C.H. Crosse, 1874
Kuschelenia culminea (A.V.M.D. D'Orbigny,1835)
Kuschelenia culminea edwardsi (P.M.A. Morelet, 1863)
Kuschelenia culminea subjussieui (H.A. Pilsbry, 1897)
Kuschelenia culminea zilchi W.K. Weyrauch, 1967
Bostryx cunyacensis A.S.H. Breure, 1978
Drymaeus curianianus (L.A. Reeve, 1849)
Naesiotus curtus (P.H. Reibisch, 1892)
Bostryx cuspidatus P.M.A. Morelet, 1863
Drymaeus cuticulus L. Pfeiffer, 1855
Naesiotus cutisculptus C.M.F. Ancey, 1901
Bostryx cuyanus L. Pfeiffer, 1867
Drymaeus cuzcoensis (L.A. Reeve, 1849)
Vermiculatus cuzcoensis (W.K. Weyrauch, 1967)
Vermiculatus cuzcoensis marasensis (W.K. Weyrauch, 1967)
Bulimus cyclostomus (FOSSIL) J.B.P.A. Lamarck, 1804 †
Drymaeus cygneus R.A. Philippi, 1867
Pseudoperonaeus cylindricus W.K. Weyrauch, 1960
Drymaeus cylindricus S.I. Da Costa, 1901
Naesiotus cymatias W.H. Dall, 1917
Drymaeus dacostae G.B. I Sowerby, 1892
Drymaeus dacostianus H.A. Pilsbry, 1898
Drymaeus dakryodes R.B. Salvador, D.C. Cavallari& L.R.L. Simone, 2015
Naesiotus darwini (L. Pfeiffer, 1846)
Rabdotus dealbatus (T. Say, 1821)
Rabdotus dealbatus liquabilis (L.A. Reeve, 1848)
Rabdotus dealbatus mooreanus (L. Pfeiffer, 1868)
Rabdotus dealbatus ozarkensis H.A. Pilsbry & J.H. Ferriss,1906