Naticarius manceli (F.P. Jousseaume, 1874)
Natica manipurensis (FOSSIL) Sijagurumayum, Singh& Kachhara, 2014 †
Natica marchadi M. Pin, 1992
Natica marchamensis (FOSSIL) J.F. Blake& W.H. Hudleston 1877 †
Eunaticina margaritaeformis W.H. Dall, 1924
Natica marochiensis (J.F. Gmelin, 1791)
Friginatica marshalli (FOSSIL) J. Marwick, 1931 †
Amauropsis martinezensis (FOSSIL) R.E. Dickerson, 1914 †
Friginatica marwicki (FOSSIL) A.G. Beu, 1970 †
Uberella marwicki (FOSSIL) Powell, 1935 †
Sinum marwicki (FOSSIL) C.R. Laws, 1930 †
Euspira marylandica (FOSSIL) T.A. Conrad, 1865 †
Poliniciella marylandica (FOSSIL) E.J. Petuch, 1988 †
Mammilla maura (J.B.P.A. Lamarck, 1816)
Polinices medinae (FOSSIL) (R.A. Philippi, 1887 †)
Polinices mediopacificus S. Kosuge, 1979
Euspira meisensis (FOSSIL) J. Makiyama, 1926 †
Natica melanoperculata J.Y. Liu, 1977
Mammilla melanostoma (J.F. Gmelin, 1791)
Mammilla melanostomoides (J.R.C. Quoy& J.P. Gaimard, 1832)
Conuber melastoma (W.J. Swainson, 1821)
Polinices mellosus (C. Hedley, 1924)
Natica menkeana R.A. Philippi, 1851
Sinum mexicanus (FOSSIL) Bose, 1906 †
Natica michaelis E. Fischer-Piette, 1942
Sigaretotrema michaudi (FOSSIL) (O.G. Michelotti, 1847 †)
Tectonatica micra (F. Haas, 1953)
Natica microglossa (FOSSIL) G.P. Deshayes, 1864 †
Sinum microstira (FOSSIL) R. Tate, 1893 †
Sinuber microstriatum R.K. Dell, 1990
Eunaticina mienisi (R.N. Kilburn, 1988)
Mammilla mikawaensis M. Azuma, 1961
Taniella mima (FOSSIL) P.A. Maxwell, 1988 †
Polinices mina (FOSSIL) Griffin & G. Pastorino,2013 †
Natica minima (FOSSIL) Henry, 1876 †