Compsodrillia catherina (FOSSIL) W.P. Woodring, 1928 †
Megasurcula centroamericana (FOSSIL) B.M. Landau, F. Da Silva& S.M. Heitz, 2016 †
Naudedrillia cerea R.N. Kilburn, 1988
Crassispira cerithoidea (P.P. Carpenter, 1857)
Viridrillia cervina (P. Bartsch, 1943)
Crassispira chacei L.G. Hertlein & A.M. Strong,1951
Calcatodrillia chamaeleon R.N. Kilburn, 1988
Crassispira chazaliei (P. Dautzenberg, 1900)
Lioglyphostoma chinenensis (FOSSIL) F.S. MacNeil, 1960 †
Knefastia chira (FOSSIL) A.A. Olsson, 1931 †
Leucosyrinx chloris (FOSSIL) A.A. Olsson, 1922 †
Inquisitor chocolata (E.A. Smith, 1875)
Compsodrillia chowanensis (FOSSIL) Gardner, 1948 †
Zonulispira chrysochildosa D.R. Shasky, 1971
Comitas chuni (E.C. Von Martens, 1901)
Pilsbryspira cinerea (H.C. Weinkauff& W. Kobelt, 1876)
Monilispira circumcincta G.W. Nowell-Usticke, 1969
Leucosyrinx claviforma (S. Kosuge, 1992)
Miraclathurella clendenini E.F. Garcia, 2008
Leucosyrinx climoi (FOSSIL) P.A. Maxwell, 1988 †
Leucosyrinx clionella W.H. Dall, 1908
Crassispira coelata (R.B. Hinds, 1843)
Pilsbryspira collaris (G.B. I Sowerby, 1834)
Crassispira comasi R. Fernández-Garcés& E. Rolán, 2010
Megasurcula condonana (FOSSIL) F.M. Anderson & B. Martin,1914 †
Crassispira conica (FOSSIL) P.O. Jung, 1965 †
Crassispira consociata (E.A. Smith, 1877)
Hindsiclava consors (FOSSIL) (G.B. I Sowerby, 1850 †)
Crassispira constricta (FOSSIL) E.W. Vredenburg, 1921 †
Crassispira contabulata (FOSSIL) A.E.M. Cossmann, 1889 †
Brachytoma convexa (FOSSIL) E.W. Vredenburg, 1921 †
Crassispira coracina J.H. McLean & L.H. Poorman,1971
Crassispira cortezi D.R. Shasky & G.B. Campbell,1964
Inquisitor cosibensis (FOSSIL) (M. Yokoyama, 1920 †)
Inquisitor cotteri (FOSSIL) E.W. Vredenburg, 1921 †