Amandana cisternasi muradae (S.H.F. Jaeckel, 1952) Baleares14,19 mm
Amandana cisternasi ortizi (L. Gasull, 1964) Spain, Ibiza9,8 mm
Amandana cisternasi scopulicola (A. Bofill& J.B. Aguilar-Amat, 1924) Baleares15,26 mm
Helicella cistorum (P.M.A. Morelet, 1845) Portugal, Faro15 mm
Trochulus clandestinus (J.D.W. Hartmann, 1821) Switzerland
Xerocrassa claudia B. Hausdorf& F.W. Welter-Schultes, 1998 Greece,
Xerocrassa claudiconus B. Hausdorf& F.W. Welter-Schultes, 1998 Greece,
Paratheba claussi B. Hausdorf, 2000 Russia, Georgia
Eutheba claustralis (K.T. Menke, 1828) Albania
Trichia claverana (J.R. Bourguignat, 1877)
Metafruticicola coartata A. Fuchs & F. Käufel,1936 Greece
Candidula codia (J.R. Bourguignat, 1859) Portugal11,7 mm
Trichia coelomphala É.A.A. Locard, 1888 Germany
Monacha comata B. Hausdorf, 2000 Turkey
Caseolus commixtus (R.T. Lowe, 1854) Portugal, Madeira6 mm
Ochtephila compar (R.T. Lowe, 1831) Portugal, Madeira6,2 mm
Monacha compingtae (P.M. Pallary, 1929) Lebanon9 mm
Geomitra compressa (FOSSIL) (Münster, 1841 †) Italy, Trentino-Alto Adige, Bolzano
Helicella confusa E. Gittenberger, 1991 Cyprus
Helicopsis conopsis M.T. Aparicio& M. Seddon, 1991 Morocco, cap Cantin14,5 mm
Monacha consona (E.A. Rossmässler, 1839) Italy, Palermo
Caseolus consors (R.T. Lowe, 1831) Portugal, Madeira8,8 mm
Xerotricha conspurcata (J.P.R. Draparnaud, 1801) Israel6 mm
Loganiopharynx constrictelabiatus (FOSSIL) (Miller, 1907) †
Xeromagna contermina (L. Pfeiffer, 1848) Italy, Sardinia Island6 mm
Angiomphalia copiosa A.A. Schileyko, 1978 Kyrgyzstan16 mm
Candidula corbellai A. Martínez-Ortí, 2011 Spain, Laredo
Xerotricha corderoi (E. Gittenberger& M.Y. Manga, 1977) Spain, Leon5,1 mm
Leucozonella corona A.A. Schileyko& T.S. Rymzhanov, 2010 Kazakhstan
Geomitra coronata (G.P. Deshayes, 1819) Portugal, Porto Santo
Geomitra coronula (R.T. Lowe, 1852) Portugal
Cyrnotheba corsica (R.J. Shuttleworth, 1843) France, Corse Island14 mm
Semifruticicola costulata (K. Brancsik, 1897) Albania, Prespa Lake
Semifruticicola costulata serbica A.J. Wagner, 1914 Albania29 mm
Pyrenaearia cotiellae (P. Fagot, 1906) France, Pyrenees