Charpentieria clavata balsamoi (P. von Ströbel, 1850)
Charpentieria clavata lorinae (P.V. Gredler, 1869)
Charpentieria clavata variscoi N. Pini, 1883
Tauphaedusa claviformis (L. Pfeiffer, 1850)
Micropontica closta O. Böttger, 1881
Albinaria coa (O. Böttger, 1889)
Columbinia cocaensis (F.P. Jousseaume, 1900)
Phaedusa coccygea (P.V. Gredler, 1887)
Phaedusa cochinchinensis (L. Pfeiffer, 1841)
Oospira coffea H. Nordsieck, 2012
Cristataria colbeauiana (L. Pfeiffer, 1862)
Sciocochlea collasi (R. Sturany, 1904)
Columbinia columbiana W. Polinski, 1924
Pararillya columellaris (FOSSIL) (A. Michaud, 1838 †)
Cochlodinastra comensis (L. Pfeiffer, 1850)
Cochlodinastra comensis lucensis (C. Gentiluomo, 1868)
Cochlodinastra comensis trilamellata (A. Schmidt, 1868)
Albinaria compressa (L. Pfeiffer, 1850)
Strigileuxina concavelamellata (F.E. Loosjes, 1963)
Graciliaria concilians (A. Schmidt, 1857)
Albinaria confusa (O. Böttger, 1878)
Strigilodelima conspersa (L. Pfeiffer, 1848)
Papilliphaedusa constellata (P.M. Heude, 1886)
Albinaria contaminata (E.A. Rossmässler, 1835)
Albinaria contaminata artaensis (O. Böttger, 1878)
Albinaria contaminata incommoda O. Böttger, 1878
Albinaria contaminata lieberuti (J.G.F. de Charpentier,1852)
Albinaria contaminata muraria (A. Schmidt, 1868)
Albinaria contaminata odysseus (O. Böttger, 1878)
Albinaria contaminata periporon T.C.M. Kemperman& E. Gittenberger, 1992
Medora contracta (E.A. Rossmässler, 1842)
Medora contracta seriola (C.A. Westerlund, 1884)
Columbinia convexivolvis H. Nordsieck, 2005
Synprosphyma cookei (H.B. Preston, 1912)
Steatonenia cooki (H.A. Pilsbry, 1919)