Epitonium christiani L. Bozzetti, 2008
Epitonium christyi (T. Iredale, 1936)
Epitonium cinetisculpta M.E.A. de Boury, 1913
Cingulacirsa cingulina (J.T. Kuroda, 1946)
Cirsotrema cirritum (FOSSIL) Duerr, 2004 †
Epitonium clallamense (FOSSIL) J.W. Durham, 1937 †
Epitonium clathratulum Turton, 1806
Epitonium clathratulum minutum (FOSSIL) (J. de C. Sowerby,1823 †)
Epitonium clathrus (C. Linnaeus, 1758)
Epitonium clathrus annulatus K.O. Milaschewitsch, 1909
Epitonium clementinum (J.P.S. Grateloup, 1840)
Scalaria clementinus (FOSSIL) J.B. †
Epitonium climacotum R.N. Kilburn, 1985
Cirsotrema cloveri L.G. Brown, 2002
Acirsa coarctata (J.G. Jeffreys, 1884)
Cirsotrema cochlea (G.B. II Sowerby, 1844)
Aciculiscala coffea (FOSSIL) D.T. Dockery, 1993 †
Opalia colimana L.G. Hertlein & A.M. Strong,1951
Epitonium columba R.N. Kilburn, 1985
Epitonium columnella W.H. Dall, 1917
Epitonium columnum A. Feneaux, 1938
Epitonium commodum (E.A. Smith, 1890)
Epitonium condensatum (FOSSIL) M.E.A. de Boury, 1886 †
Boreoscala condoni (FOSSIL) W.H. Dall, 1909 †
Striaticostatum congestum (FOSSIL) N.F. Sohl, 1964 †
Epitonium conjunctum (M. Yokoyama, 1922)
Epitonium connexum (G.B. II Sowerby, 1844)
Cirsotrema contabulatum (FOSSIL) G.P. Deshayes, 1861 †
Amaea contexta H. DuShane, 1970
Epitonium continens (J.C. Melvill & R. Standen,1903)
Epitonium conwaiae (FOSSIL) G. Schmelz & R. Portell,2007 †
Epitonium cookeanum W.H. Dall, 1917
Acirsa cookiana (R.K. Dell, 1956)
Rugatiscala cooperi (FOSSIL) Garvie, 1996 †
Epitonium cophinodes (J.C. Melvill, 1904)