Glessula ceylanica (L. Pfeiffer, 1845)
Opeas chaperi F.P. Jousseaume, 1889
Curvella chapini H.A. Pilsbry, 1919
Leptinaria charlottei F. Baker, 1923
Glessula chessoni (W.H. Benson, 1860)
Zootecus chion (L. Pfeiffer, 1856)
Fortuna clairi (FOSSIL) W.R. Schlickum& F. Strauch, 1972 †
Subulona clara (H.A. Pilsbry, 1919)
Bocageia clava (L. Pfeiffer, 1852)
Allopeas clavulinum (V.L.V. Potiez& A. Michaud, 1838)
Obeliscus clavus H.A. Pilsbry, 1906
Prosopeas cochliodes (L. Pfeiffer, 1842)
Leptopeas colimense (J.C.H. Crosse& P.H. Fischer, 1869)
Glessula collettae E.R. Sykes, 1898
Obeliscus columella (R.A. Philippi, 1844)
Tortaxis comaensis V.T. Do, 2014
Hypolysia connollyana L. Pfeiffer
Oreohomorus connollyi (N.H. Odhner, 1932)
Curvella conoidea (E.C. Von Martens, 1892)
Pseudoglessula conradti E.C. Von Martens
Opeas contamanoensis H.B. Preston, 1914
Leptinaria convoluta E.C. Von Martens, 1898
Bocageia cornea (P.M.A. Morelet, 1877)
Synapterpes coronatus (L. Pfeiffer, 1846)
Lamellaxis costaricanus (E.C. Von Martens, 1898)
Rhodea cousini F.P. Jousseaume, 1900
Allopeas crassula (W.H. Benson, 1836)
Lamellaxis crenulatus (E.C. Von Martens, 1898)
Pseudoglessula cressyi M. Connolly, 1925
Pseudoglessula cruda H.A. Pilsbry, 1919
Opeas cuencana (L. Pfeiffer, 1858)
Ochrodermella cumingiana (L. Pfeiffer, 1849)
Obeliscus cuneus (L. Pfeiffer, 1845)
Obeliscus cuneus riparius (L. Pfeiffer, 1852)
Euonyma curtissima B. Verdcourt