Epitonium californicum W.H. Dall, 1917
Epitonium callipeplum W.H. Dall, 1919
Striatascala callipictum (FOSSIL) W.P. Woodring, 1928 †
Alexania callizona (T. Habe, 1961)
Opalia calvertensis (FOSSIL) Martin, 1904 †
Opalia calyx T. Nakayama, 2012
Clathroscala cancellata (FOSSIL) (G.B. Brocchi, 1814 †)
Epitonium candeanum (A.V.M.D. D'Orbigny,1842)
Epitonium candidissimum (T.A. de M. Monterosato,1877)
Cirsotrema canephorum (J.C. Melvill, 1906)
Acirsa canicularis (FOSSIL) (J.B.P.A. Lamarck,1804 †)
Epitonium canna W.H. Dall, 1919
Gyroscala cantaurana (FOSSIL) B.M. Landau, F. Da Silva& S.M. Heitz, 2016 †
Epitonium carchedon (T. Iredale, 1936)
Epitonium castum (A. Adams, 1873)
Epitonium catalinae W.H. Dall, 1908
Epitonium catalinense W.H. Dall, 1917
Epitonium catanuense (J. de C. Sowerby, 1844)
Epitonium celesti (A. Aradas, 1854)
Epitonium cerdantum (J.C. Melvill & R. Standen,1903)
Amaea cerea (H. Masahito, J.T. Kuroda& T. Habe, 1971)
Punctiscala cerigottana (R. Sturany, 1896)
Scalaria cerithioides (FOSSIL) Gardner †
Acirsa cerralvoensis (H. DuShane, 1970)
Epitonium chalybeatum P.F. Röding, 1798
Epitonium championi W.J. Clench & H. Turner,1952
Epitonium chancellorensis (FOSSIL) E.J. Petuch, 1988 †
Epitonium charlestonensis (FOSSIL) Johnson, 1931 †
Cirsotrema chathamense (FOSSIL) J. Marwick, 1928 †
Epitonium chaussyense (FOSSIL) M.E.A. de Boury, 1886 †
Scalina cheneyi (FOSSIL) DeVries, 2006 †
Epitonium chiarae L. Bozzetti, 2007
Epitonium chinglinae Y.C. Lee & W.L. Wu, 1998
Cirsotrema chipolanum (FOSSIL) G. Schmelz & R. Portell,2007 †
Plesioacirsa chitaniana (FOSSIL) (M. Yokoyama, 1926 †)