Episcynia multicarinata (W.H. Dall, 1889)
Cyclostremiscus multiliratus F. Rubio, E. Rolán& E.F. Garcia, 2011
Monodosus multinodosus Rubio & Rolán, 2016
Vitrinella multispiralis H.A. Pilsbry & A.A. Olsson,1952
Solariorbis multistriatus (A.E. Verrill, 1884)
Teinostoma multisulcatum P. Dautzenberg & H. Fischer,1907
Teinostoma myrae H.A. Pilsbry & A.A. Olsson,1952
Teinostoma nana (FOSSIL) (Lea, 1833 †)
Tornus nanulus A. Adams, 1861
Teinostoma narina H.A. Pilsbry & A.A. Olsson,1945
Solariorbis narinensis H.A. Pilsbry & A.A. Olsson,1952
Uzumakiella natalensis R.N. Kilburn, 1977
Tornus naticoides (FOSSIL) Wood 1879 †
Vitrinella naticoides P.P. Carpenter, 1857
Teinostoma nense H.A. Pilsbry& J.T.L. McGinty, 1945
Teinostoma neodiensa (FOSSIL) †
Naricava neozelanica A.W.B. Powell, 1940
Vitridomus nereidis (H.A. Pilsbry& A.A. Olsson, 1945)
Teinostoma nesaeum H.A. Pilsbry& J.T.L. McGinty, 1945
Anticlimax niasensis (K.H.J. Thiele, 1925)
Episcynia nicholsoni (A.M. Strong& L.G. Hertlein, 1939)
Laciniorbis nipponicus J.T. Kuroda
Circulus nitidus (FOSSIL) (G.P. Deshayes, 1862 †)
Cyclostremiscus nodiferus H.A. Pilsbry & A.A. Olsson,1952
Cyclostremiscus nodosus (H.F. Carpenter, 1857)
Discopsis nodulosus E. Rolán & F. Rubio, 2002
Cyclostremiscus nummus H.A. Pilsbry & A.A. Olsson,1952
Anticlimax obesa F. Rubio & E. Rolán, 2014
Vitrinella obliquestriata (FOSSIL) W.M. Gabb, 1881 †
Morchiella obvoluta (A. Adams, 1870)
Anticlimax occidens H.A. Pilsbry & A.A. Olsson,1952
Circulus occidentalis (FOSSIL) H.A. Pilsbry& A.A. Olsson, 1941 †
Teinostoma ochsneri A.M. Strong & L.G. Hertlein,1939
Circulus octolirata (P.P. Carpenter, 1856)
Vitrinella oldroydi P. Bartsch, 1907