Oenopota casentina (W.H. Dall, 1919)
Propebela cassis I.P. Bogdanov, 1989
Eucithara castanea (L.A. Reeve, 1846)
Agathotoma castellata (E.A. Smith, 1888)
Apispiralia catena C.F. Laseron, 1954
Eucithara cazioti (H.B. Preston, 1905)
Benthomangelia celebensis (M.M. Schepman, 1913)
Eucithara celebensis (R.B. Hinds, 1843)
Saccharoturris centrodes (FOSSIL) J. Gardner, 1937 †
Kurtziella cerina (Kurtz & W. Stimpson,1851)
Cryoturris cerinella (W.H. Dall, 1889)
Mangelia ceroplasta (K.J. Bush, 1885)
Mangelia cesta W.H. Dall, 1919
Mangelia cetolaca W.H. Dall, 1908
Mangelia chariessa (FOSSIL) J. Gardner, 1938 †
Ithycythara chechoi J. Espinosa & J.A. Ortea,2004
Mangelia china (FOSSIL) F.S. MacNeil, 1960 †
Macteola chinoi P. Stahlschmidt, K. Fraussen& R.N. Kilburn, 2012
Mangelia christina W.H. Dall, 1927
Bela chuni K.H.J. Thiele, 1925
Eucithara cincta (L.A. Reeve, 1846)
Pyrgocythara cinctella (L. Pfeiffer, 1840)
Oenopota cinerea (H.P.C. Møller, 1842)
Mangelia cingulata (H. Strebel, 1908)
Oenopota cingulata A.N. Golikov & V.V. Gulbin,1977
Eucithara cinnamomea (R.B. Hinds, 1843)
Eucithara cinnamomea peraffinis H.A. Pilsbry, 1904
Cryoturris citronella (W.H. Dall, 1886)
Bela clarae A. Peñas & E. Rolán, 2008
Vexiguraleus clifdenensis (FOSSIL) A.W.B. Powell, 1942 †
Mangelia coarctata (E. Forbes, 1840)
Pseudorhaphitoma cognata (K.H.J. Thiele, 1925)
Guraleus colmani T. Shuto, 1983
Mangelia colombi R.P.J. Hervier, 1897
Eucithara columbelloides (L.A. Reeve, 1846)