Bathia madagascariensis G.C. Robson, 1914
Dupontia maillardi (G.P. Deshayes, 1863)
Nesonanina malleata B. Rensch
Helicarion masakii J.T. Kuroda, 1960
Helicarion mastersi J.C. Cox, 1868
Helicarion mathewsi H.B. Preston, 1913
Wilhelminaia mathildae H.B. Preston, 1913
Eungarion mcdonaldi J. Stanisic, 1993
Nitor medioximus T. Iredale, 1941
Helicarion megastoma J.C. Cox, 1868
Geotrochus meristotrochus J.J. Vermeulen, M. Schilthuizen& T.S. Liew MS
Hemiglypta microglypta O.F. von Möllendorff,1893
Bekkochlamys micrograpta (H.A. Pilsbry, 1900)
Mathewsoconcha microstriata H.B. Preston, 1913
Ctenophila milloti E. Fischer-Piette, F. Blanc& F. Salvat, 1975
Helicarion miranda T. Iredale, 1944
Sivella montana (O.F. von Möllendorff,1901)
Helicarion monticula J.T. Kuroda & J.M. Abe,1980
Rahula moolenbeeki W.J.M. Maassen, 2000
Orpiella mouelti Kae
Orpiella mouelti tawale Kae
Helicarion mutsuensis Y. Hirase, 1908
Helicarion nachikoae J.T. Kuroda, 1953
Parakaliella nahaensis (G.P.L.K. Gude, 1900)
Erepta nevilli A. Adams, 1867
Ctenoglypta newtoni (G. Nevill, 1871)
Helicarion nigra J.R.C. Quoy & J.P. Gaimard,1832
Helicarion nikkoensis E. Sorita & M. Kawana,1983
Owaraha nissani R.K. Dell, 1955
Dupontia nitella (P.M.A. Morelet, 1868)
Petalochlamys nitidus (H.A. Pilsbry & Y. Hirase,1905)
Orpiella nouleti (E.J. Le Guillou, 1842)
Nesonanina novaehiberniae (J.R.C. Quoy& J.P. Gaimard, 1832)
Helicarion novoguineensis E.A. Smith, 1887
Laocaia obesa A.A. Kuzminykh, 1999