Mesembrinus columbiensis (L. Pfeiffer, 1855) Colombia28 mm
Bostryx columellaris L.A. Reeve, 1849 Peru9 mm
Naesiotus columellaris W.K. Weyrauch, 1967 Peru, Lima9 mm
Ornatimormus combinai W.K. Weyrauch, 1958 Peru, Junin
Drymaeus comis H.B. Preston, 1907 Colombia
Bostryx compactus H.C. Fulton, 1901 Bolivia16 mm
Rabdotus confinus L.A. Reeve, 1850 Texas
Drymaeus confluens L. Pfeiffer, 1855 Colombia39,5 mm
Mesembrinus conicus S.I. Da Costa, 1907 Mexico, Oaxaca17,5 mm
Bostryx conspersus (G.B. I Sowerby, 1833) Peru, Lima15 mm
Naesiotus constrictus (L.A. Reeve, 1848) Brazil, Brasilia
Drymaeus conus H.A. Pilsbry, 1902 South America
Drymaeus convexus (L. Pfeiffer, 1855) Ecuador34 mm
Neopetraeus cora (A.V.M.D. D'Orbigny,1835) Cajamarca, Peru37 mm
Scutalus coraeformis H.A. Pilsbry, 1897 Peru
Scutalus coraeformis debilisculptus W.K. Weyrauch, 1967 Peru, Cajamarca35,6 mm
Kora corallina L.R.L. Simone, 2012 Brazil, Bahia43,2 mm
Bulimulus corderoi J.J. Parodíz, 1962 Uruguay24 mm
Bostryx cordillerae P. von Ströbel, 1874 Argentina
Bulimulus coriaceus L. Pfeiffer, 1857 Oaxaca, Mexico17,1 mm
Bulimulus corneus G.B. I Sowerby, 1833 Guatemala
Bulimus corrugatus P.P. King, 1831 Chile
Bulimulus corumbaensis H.A. Pilsbry, 1897 Brazil, Corumba16 mm
Naesiotus cosmicus J.F. Mabille, 1895 Mexico, Baja California
Drymaeus costaricensis L. Pfeiffer, 1862 Nicaragua
Bostryx costellatus M.I. Hylton-Scott, 1971 Argentina
Scutalus costifer H.A. Pilsbry, 1932 Peru23,5 mm
Scutalus costifer naggsi A.S.H. Breure, 1978 Peru
Scutalus costulatus W.K. Weyrauch, 1967 Peru
Vermiculatus cotopaxiensis (L. Pfeiffer, 1853) Ecuador33,9 mm
Scutalus cousini (F.P. Jousseaume, 1887) Ecuador41 mm
Mesembrinus cozumelensis (H.G. Richards, 1936) Mexico, Yucatan
Bostryx cracentis A.S.H. Breure, 1978 South America
Bostryx cremonthauma H.A. Pilsbry South America
Lopesianus crenulatus W.K. Weyrauch, 1958 Brazil, Cabo Frio