Nassarius mekranicus (FOSSIL) (E.W. Vredenburg, 1925 †) Pakistan, Baluchistan, Makran
Bullia melanoides (G.P. Deshayes, 1832) India, Tamil Nadu29 mm
Bullia melanoides strenaria (G.P. Deshayes, 1832) India, Trivandrum26,3 mm
Nassarius mendicus (A.A. Gould, 1850) USA, Washington16 mm
Nassarius merenda (FOSSIL) A.A. Olsson, 1922 † Costa Rica8 mm
Nassaria mergregia (L.A. Reeve, 1844) Mauritius15 mm
Nassarius merlei (FOSSIL) F. Van Dingenen, L. Ceulemans& al., 2015 † France, Bretagne30,2 mm
Nassarius metuliformis (FOSSIL) F.S. MacNeil, 1960 † Okinawa
Antillophos metuloides (W.H. Dall, 1896)
Antillophos mexicanus (FOSSIL) (Bose, 1906 †) Panama, Colón30 mm
Antillophos miculus K. Fraussen & G.T. Poppe,2005 Philippines, Aliguay Island12 mm
Tritia miga (J.G. Bruguière, 1789) Senegal, Dakar17,4 mm
Cyclope migliorinii (FOSSIL) Bevilaqua, 1928 † Spain, Malaga18 mm
Strombinophos mimicus (FOSSIL) W.P. Woodring, 1964 † Panama, Colón
Metaphos minusculus (W.H. Dall, 1917) Mexico, Puerto Escondido25 mm
Antillophos minutus (M.M. Schepman, 1911)
Nassarius miqueli (FOSSIL) M.A. Peyrot, 1903 † France, Aquitaine18 mm
Nassarius mirabilis L. Bozzetti, 2007 Madagascar, Lavanono10,5 mm
Dorsanum miran (J.G. Bruguière, 1789) Guinea Bissau26 mm
Bullia mirepicta L. Bozzetti, 2007 Madagascar, Tolagnaro11,2 mm
Nassaria miriamae (R.K. Dell, 1967) New Zealand
Nassarius miser (W.H. Dall, 1908) Bay of Panama12,5 mm
Tritiaria mississippiensis (FOSSIL) (T.A. Conrad, 1848 †) USA, Mississippi11 mm
Nassarius mobilis (C. Hedley & W.L. May,1908) Australia, Bass Strait8 mm
Nassarius moestus (R.B. Hinds, 1844) Mexico, Sonora15 mm
Antillophos monachus (FOSSIL) W.P. Woodring, 1964 † Panama, Colón
Nassarius monensis (FOSSIL) (Forbes) † England, Isle of Man
Buccinanops monilifer (L.C. Kiener, 1834) Brazil, Guarapari83 mm
Antillophos monsecourorum K. Fraussen & G.T. Poppe,2005 China, Zhejiang19 mm
Nassarius moolenbeeki H.H. Kool, 1995 Vanuatu Island, New Hebrides10,6 mm
Antillophos moorei (FOSSIL) (R.J.L. Guppy, 1866 †) Dominican Republic37 mm
Antillophos moorei costaricensis (FOSSIL) (A.A. Olsson, 1922 †) Costa Rica26 mm
Nassaria moosai K. Fraussen, 2006 Indonesia, Tanimbar Islands33,4 mm
Caesia moranianus (FOSSIL) Martin, 1914 †
Bullia mozambicensis E.A. Smith, 1878 Park Rynie, Natal, South Africa36 mm