Chicoreus mississippiensis (FOSSIL) (T.A. Conrad, 1848 †)
Murex mississippiensis (FOSSIL) W.H. Dall, 1915 †
Typhina mississippiensis (FOSSIL) R.L. Gertman, 1969 †
Coralliophila mitraeforma S. Kosuge, 1985
Orania mixta R. Houart, 1995
Babelomurex miyokoae S. Kosuge, 1985
Timbellus miyokoae (S. Kosuge, 1979)
Mipus miyukiae S. Kosuge, 1985
Chicoreus mocki M. Beals, 1997
Pteropurpura modesta (H.C. Fulton, 1936)
Trophonopsis modestus (G.B. II Sowerby, 1880)
Nucella monacanthos (FOSSIL) (G.B. Brocchi, 1814 †)
Nassa monensis (FOSSIL) E. Forbes, 1842 †
Chicoreus monicae L. Bozzetti, 2001
Xymene moniliferus (FOSSIL) (F.W. Hutton, 1885 †)
Ceratostoma monoceros (G.B. II Sowerby, 1841)
Acanthina monodon (P.S. Pallas, 1774)
Acanthina monodon imbricata J.B.P.A. Lamarck, 1816
Coralliophila monodonta (H.M.D. de Blainville,1832)
Coralliophila monodonta porphyroleuca (J.C.H. Crosse, 1870)
Genkaimurex monopterus (H.A. Pilsbry, 1904)
Trophon monotropis (FOSSIL) R. Tate, 1888 †
Minibraria monroei (J.T.L. McGinty, 1962)
Coralliophila monterosatoi (É.A.A. Locard, 1897)
Monstrotyphis montfortii (A. Adams, 1863)
Aspella morchi G.E. Radwin & D'Attilio,1976
Favartia morisakii J.T. Kuroda& T. Habe in T. Habe, 1961
Coralliophila morishimai J.T. Kuroda & T. Shikama,1966
Vokesimurex morrisoni E.J. Petuch & D.M. Sargent,2011
Zeatrophon mortenseni (N.H. Odhner, 1924)
Zeatrophon mortenseni caudatinus (N.H. Odhner, 1924)
Drupa morum P.F. Röding, 1798
Drupa morum iodostoma (R.P. Lesson, 1840)
Siratus motacilla (J.F. Gmelin, 1791)
Rapana moulinsii (FOSSIL) (Brochon, 1849 †)