Amphidromus metabletus trizona O.F. von Möllendorff,1901
Papuina metrodora W.S.S. Van Benthem-Jutting,1965
Austrochloritis metuenda T. Iredale, 1938
Chloritis miara J.F. Mabille
Chloritis miara stenomphala A.R.J.B. Bavay& P. Dautzenberg, 1909
Kimboraga micromphala (G.P.L.K. Gude, 1907)
Chloritis micromphalus H.A. Pilsbry, 1890
Chloritis microtricha (O.F. von Möllendorff,1898)
Badistes middenense A. McLauchlan, 1954
Papuina migratoria L. Pfeiffer, 1865
Damochlora millepunctata (E.A. Smith, 1894)
Strepsitaurus milyeringus G.A. Solem, 1997
Rhagada mimica T. Iredale, 1939
Rhagada minima G.A. Solem, 1997
Chloritis minnigerodei (B. Strubell, 1895)
Lacustrelix minor G.A. Solem, 1992
Semotrachia minuta G.A. Solem, 1993
Amphidromus mirandus A.R.J.B. Bavay& P. Dautzenberg, 1912
Camaena mirifica (A.R.J.B. Bavay& P. Dautzenberg, 1908)
Neveritis misella (G.P.L.K. Gude, 1907)
Papuina miser J.C. Cox, 1873
Rhynchotrochus misima T. Iredale, 1941
Thersites mitchellae J.C. Cox, 1864
Amplirhagada mitchelliana G.A. Solem, 1981
Sphaerospira mitifica (T. Iredale, 1933)
Chloritis moellendorffi C.M.F. Ancey, 1898
Satsuma moellendorffiana H.A. Pilsbry & Y. Hirase,1903
Papuina molesta E.A. Smith, 1897
Pommerhelix monacha (L. Pfeiffer, 1859)
Exiligada monochroma F. Criscione, A. Law& F. Köhler, 2012
Cristilabrum monodon G.A. Solem, 1985
Quistrachia monogramma (C.M.F. Ancey, 1898)
Amphidromus monsecourorum Thach & F. Huber, 2017
Amplirhagada montalivetensis (E.A. Smith, 1894)
Quistrachia montebelloensis (H.B. Preston, 1914)