Emarginula connelli R.N. Kilburn, 1978
Scutus contractum (FOSSIL) A.E.M. Cossmann, 1903 †
Emarginula convexa C. Hedley, 1907
Puncturella cooperi P.P. Carpenter, 1864
Emarginula coralliora (FOSSIL) Lundgren, 1867 †
Diodora corbicula (G.B. II Sowerby, 1862)
Puncturella corolla J.C. Verco, 1908
Scutus corrugatus (L.A. Reeve, 1842)
Fissurella costaria G.P. Deshayes, 1824
Emarginula costata (FOSSIL) J.B.P.A. Lamarck, 1802 †
Fissurella costata R.P. Lesson, 1831
Emarginula costulata G.P. Deshayes, 1863
Emarginula crassa J. de C. Sowerby, 1813
Fissurella crassa J.B.P.A. Lamarck, 1822
Emarginula crassicostata G.B. II Sowerby, 1863
Scutus crassiradiatum (FOSSIL) A.E.M. Cossmann, 1903 †
Montfortia cratitia (A. Adams, 1852)
Lucapinella crenifera (G.B. I Sowerby, 1835)
Megathura crenulata (G.B. I Sowerby, 1825)
Zeidora crepidula L.R.L. Simone & C.M. Cunha,2014
Cornisepta crossei (P. Dautzenberg& H. Fischer, 1896)
Diodora cruciata (A.A. Gould, 1846)
Diodora crucifera (H.A. Pilsbry, 1891)
Amblychilepas crucis (R.H. Beddome, 1882)
Cranopsis cucullata (A.A. Gould, 1846)
Emarginula cucullata C.B. Adams, 1851
Fissurella cumingi L.A. Reeve, 1849
Cranopsis cumingii (A. Adams, 1853)
Fissurella cumingii L.A. Reeve, 1849
Hemitoma cumingii G.B. II Sowerby, 1863
Puncturella curva A.N. Golikov & V.V. Gulbin,1977
Emarginula curvamen T. Iredale, 1925
Emarginula curvata M.M. Schepman, 1908
Macroschisma cuspidatum (A. Adams, 1851)
Emarginula cuvieri J.V. Audouin, 1826