Rabdotus novoleonis H.A. Pilsbry, 1953
Naesiotus nuciformis S.A.A. Petit De La Saussaye,1853
Vermiculatus nucinus (L.A. Reeve, 1850)
Naesiotus nucula (L. Pfeiffer, 1854)
Naesiotus nudus P.H. Reibisch, 1892
Naesiotus nux (W.J. Broderip, 1832)
Drymaeus nystianus (L. Pfeiffer, 1853)
Bostryx obeliscus A. Zilch, 1954
Bostryx obliquiportus W.K. Weyrauch, 1960
Bostryx obliquistriatus (S.I. Da Costa, 1901)
Drymaeus occidentalis K. Miller, 1879
Vermiculatus ochraceus (P.M.A. Morelet, 1863)
Drymaeus ochrocheilus E.A. Smith, 1877
Naesiotus ochsneri W.H. Dall, 1917
Bulimus oldhamianus (FOSSIL) Hislop, 1859 †
Naesiotus olla W.H. Dall, 1893
Bostryx olmosensis A.S.H. Breure, 1978
Vermiculatus omissus (W.K. Weyrauch, 1967)
Naesiotus orbignyi (L. Pfeiffer, 1846)
Mesembrinus oreades (A.V.M.D. D'Orbigny,1835)
Drymaeus orobaena (A.V.M.D. D'Orbigny,1835)
Bostryx orophilus P.M.A. Morelet, 1863
Bulimulus orthodoxus H. Drouët, 1859
Drymaeus orthostoma E.A. Smith, 1877
Bostryx ortizi W.K. Weyrauch, 1967
Scutalus ortizpuentei W.K. Weyrauch, 1967
Bulimulus ouallensis A.S.H. Breure & Hovestadt,2016
Naesiotus oxylabris (A. Doering, 1879)
Naesiotus pachys (H.A. Pilsbry, 1897)
Drymaeus paeteli J.A. Albers, 1854
Drymaeus palassus A.S.H. Breure & A. Eskens,1981
Bulimus pallens L.A. Reeve, 1849
Drymaeus pallidior W.H. Dall, 1893
Naesiotus pallidior (G.B. I Sowerby, 1833)
Naesiotus pallidus P.H. Reibisch, 1892