Plastiscala morchi (G.F. Angas, 1871)
Plastiscala morchi bentha T. Iredale, 1936
Plastiscala morchi profundior T. Iredale, 1936
Opalia morchiana W.H. Dall, 1889
Epitonium morgani (FOSSIL) (Vasseur, 1881 †)
Opalia mormulaeformis (H. Masahito, J.T. Kuroda& T. Habe, 1971)
Acirsa morsei (M. Yokoyama, 1926)
Epitonium mucronatum (A. Feneaux, 1943)
Epitonium multicostatum (G.B. II Sowerby, 1844)
Epitonium multistriatum T. Say, 1826
Globiscala munda (K.H. Barnard, 1969)
Epitonium muricatum (FOSSIL) (C.R. Laws, 1933 †)
Epitonium muricatum (A. Risso, 1826)
Acirsa murrha (H. DuShane, 1970)
Epitonium mzambanum R.N. Kilburn, 1985
Confusiscala nackiji (FOSSIL) Blagovetshenskiy, 2015 †
Claviscala nagaii T. Nakayama, 2000
Boreoscala nagaminensis (FOSSIL) Y. Otuka, 1934 †
Cirsotrema nagaoi (K. Oyama & A. Mizuno,1958)
Epitonium nanum (J.G. Jeffreys, 1884)
Alexania natalensis (J.R. le B. Tomlin, 1926)
Amaea natalis (K.H. Barnard, 1963)
Depressiscala nautlae (O.A.L. Mörch, 1875)
Amaea nebulodermata (M. Azuma, 1972)
Opalia neocaledonica E.F. Garcia, 2004
Gregorioiscala nevillei E.F. Garcia, 2003
Discoscala niasensis (FOSSIL) G.G. Wissema, 1947 †
Epitonium nicobarica G.B. II Sowerby, 1847
Epifungium nielsi E. Gittenberger& A. Gittenberger, 2005
Gregorioiscala nierstraszi (M.M. Schepman, 1909)
Acrilla nigeriensis (FOSSIL) F.E. Eames, 1957 †
Epitonium niigishiense (FOSSIL) J. Makiyama, 1957 †
Cylindriscala nitida (J.T. Kuroda & K. Itô,1961)
Depressiscala nitidella (W.H. Dall, 1889)
Epitonium nodai T. Nakayama, 2000