Natica mino (FOSSIL) J. Gardner, 1937 †
Sinum minus (W.H. Dall, 1889)
Globisinum miocaenicum (FOSSIL) (H.H. Suter, 1917 †)
Tectonatica miocolligens (FOSSIL) (F. Sacco, 1891 †)
Tectonatica miopusilla (FOSSIL) (F. Kautsky, 1925 †)
Natica mississippiensis (FOSSIL) (T.A. Conrad, 1848 †)
Polinella modesta (FOSSIL) (J. Marwick, 1924 †)
Euspira molarensis (FOSSIL) E. Robba, Pedriali& E. Quaggiotto, 2016 †
Natica monodi I. Marche-Marchad, 1957
Euspira montagui (E. Forbes, 1838)
Haliotinella montrouzieri S.M. Souverbie, 1875
Natica moquiniana C.A. Récluz, 1853
Tejonia moragai (FOSSIL) (C.C. Stewart, 1927 †)
Euspira morisi (FOSSIL) Awad & Abed, 1967 †
Natica morraboolensis (FOSSIL) R. Tate, 1893 †
Cochlis mortoni (FOSSIL) E. Robba, Pedriali& E. Quaggiotto, 2016 †
Taniella motutaraensis (FOSSIL) (Powell, 1935 †)
Tanea mozaica (G.B. I Sowerby, 1883)
Polinices mucronatus (FOSSIL) J. Marwick, 1931 †
Natica multipunctata H.M.D. de Blainville,1825
Natica multipunctata fanel (C.A. Récluz, 1844)
Sinum nagibi (FOSSIL) Abbass, 1967 †
Pseudopolinices nanus (H.P.C. Møller, 1842)
Euspira napus E.A. Smith, 1904
Sinum naticoidalis (FOSSIL) E.H. Vokes, 1938 †
Cochlis neglecta (FOSSIL) (C. Mayer, 1858 †)
Polinices nelsoni (FOSSIL) A.A. Olsson, 1932 †
Natica neptuni (FOSSIL) d'Orbigny, 1850 †
Neverita nereidis (FOSSIL) C.J. Maury, 1917 †
Sinum neritoideum (C. Linnaeus, 1758)
Stigmaulax niasensis (FOSSIL) G.G. Wissema, 1947 †
Falsilunatia nigromaculata (É. Lamy, 1911)
Natica nipponensis J.T. Kuroda, 1961
Euspira nitida (E. Donovan, 1804)
Cryptonatica noe (FOSSIL) (A.V.M.D. D'Orbigny,1850 †)