Trochoidea carinatoglobosa (F. Haas, 1934)
Actinella carinofausta H.W. Waldén, 1983
Amandana caroli (W.L.H. Dohrn& D.F. Heynemann, 1862)
Amandana caroli espartariensis (F. Schröder, 1984)
Amandana caroli formenterensis F. Schröder, 1984
Prostenomphalia carpathica A.A. Baidashnikov, 1985
Candidula carrapateirensis G.A. Holyoak & D.T. Holyoak,2014
Monacha cartusiana (O.F. Müller, 1774)
Cernuella caruanae W. Kobelt, 1888
Helicotricha carusoi F.L. Giusti, G. Manganelli& J.V. Crisci, 1992
Leucozonella caryodes (C.A. Westerlund, 1896)
Xerosecta castriesi (P.M. Pallary, 1904)
Candidula castriota L. Soós, 1924
Kokotschashvilia caucasicola (W.A. Lindholm, 1913)
Trochoidea cauta (C.A. Westerlund, 1879)
Candidula cavannae M. Paulucci, 1881
Helicopsis cereoflava E.A. Bielz, 1851
Xeromagna cespitum (J.P.R. Draparnaud, 1801)
Xeromagna cespitum arigonis (A. Schmidt, 1853)
Xeroleuca chabertiana T. Kira, 1955
Helicella chadiana (P.M. Pallary, 1898)
Nanaja chatkalica A.G. Kuznetsov, 1996
Discula cheiranthicola (R.T. Lowe, 1831)
Discula cheiranticola (R.T. Lowe, 1831)
Xerosecta cherifiana (P.M. Pallary, 1898)
Amandana chiae (P. Fagot, 1886)
Trichia chnoodia (J.R. Bourguignat, 1864)
Abchasohela christophori (O.W. Von Rosen, 1911)
Leptaxis chrysomela (L. Pfeiffer, 1848)
Ciliella ciliata (J.D.W. Hartmann, 1821)
Hygromia cinctella (J.P.R. Draparnaud, 1801)
Cernuella cisalpina (E.A. Rossmässler, 1837)
Metatheba ciscaucasica B. Hausdorf, 2000
Amandana cisternasi (J.G. Hidalgo, 1883)
Amandana cisternasi calasaladae (S.G.A. Jaeckel, 1952)