Cantharidus mortenseni (N.H. Odhner, 1924) Canada, Quebec, Anticosti Island6 mm
Gibbula moussoni (FOSSIL) (C. Mayer, 1861 †) France, Aquitaine
Trochus multicarinatus P. Fischer, 1876
Jujubinus multicingulatus (FOSSIL) (C.L.F. von Sandberger, 1860 †) Hungary, Bükk
Gibbula multicolor (C.F.F. von Krauss, 1848) South Africa, Algoa Bay7 mm
Gibbula multicolor hera W.H. Turton, 1932 South Africa, Jeffreys Bay6,9 mm
Clanculus multipunctatus P. Jansen, 1995 Australia
Calthalotia mundula (A. Adams & G.F. Angas,1864) Australia, Broome
Isanda murrea (L.A. Reeve, 1848) Japan
Conotalopia musiva (A.A. Gould, 1861) Philippines, Bohol Island4,1 mm
Conotalopia mustelina (A.A. Gould, 1861) Japan
Phorcus mutabilis (R.A. Philippi, 1846) Turkey, Bozcaada Island13 mm
Clelandella myriamae S. Gofas, 2005 Turkey8 mm
Callumbonella namibiensis E. Rolán, Gonzalez-Porto& Matos-Pita, 2009 Namibia17 mm
Diloma nana A.A. Gould, 1861 Japan
Intistoma nashae (FOSSIL) (Clark, 1915 †)
Clanculus natalensis D.G. Herbert, 1993 Mozambique12 mm
Monodonta nebulosa (P. Forsskål in C. Niebuhr, 1775) Arab Emirates21 mm
Stomatella nebulosa (A. Adams, 1850)
Pseudominolia nedyma (J.C. Melvill, 1897) Egypt, Sinai Peninsula7,6 mm
Trochus neglectus (FOSSIL) Martin, 1905 † Indonesia, Jawa Barat, Bandung
Ethminolia nektonica (T.A. Okutani, 1961) Philippines, Palawan Island13 mm
Trochus nemoralis (FOSSIL) Hudleston † UK, England, Somerset
Trochus neptuni (A. Adams, 1855) China
Gibbula neraudeaui (FOSSIL) B.M. Landau, L. Ceulemans& F. Van Dingenen, 2016 †
Monodonta neritoides (R.A. Philippi, 1849) China, Zhejiang19 mm
Clanculus nexus L. Bozzetti, 2014 Madagascar, Lavanono8,1 mm
Diloma nigerrima (J.F. Gmelin, 1791) New Zealand, Marlborough20 mm
Diloma nigerrima digna H.J. Finlay, 1926 New Zealand, Auckland20 mm
Stomatella nigra J.R.C. Quoy& J.P. Gaimard, 1834 Japan13,5 mm
Infundibulum nigropunctatus L.A. Reeve, 1861 South Africa, Natal32 mm
Infundibulum nigropunctatus hanleyanus (C.F.F. von Krauss, 1848) Australia, Port Hedland66 mm
Trochus niloticiformis (FOSSIL) (Schlotheim, 1820 †) Denmark
Solarioconulus ninacacanus (FOSSIL) F. Haas, 1953 † Peru, Cerro de Pasco area
Ethalia nitida A. Adams, 1863 Japan