Glessula nagarjunensis Budha & Naggs, 2017
Obeliscus nanus F. Haas, 1951
Glessula neglecta G.P.L.K. Gude
Thomea newtoni A.A.A. Girard, 1894
Glessula nitens (J.E. Gray, 1825)
Oreohomorus nitida (E.C. Von Martens, 1897)
Chilonopsis nonpareil G. Perry
Opeas nothapalinus B. Verdcourt
Glessula notigena (W.H. Benson, 1856)
Opeas nutans (P.V. Gredler, 1887)
Curvella nyasana E.A. Smith, 1899
Obeliscus obeliscus (S. Moricand, 1833)
Stenogyra octogyra (L. Pfeiffer, 1856)
Subulina octona (J.G. Bruguière, 1792)
Opeas opella H.A. Pilsbry & E.G. Vanatta,1906
Opeas operanum (L. Pfeiffer, 1846)
Curvella orani E. Fischer-Piette & al.,1994
Subulona ordinaria H.B. Preston, 1910
Glessula oreas (L.A. Reeve, 1850)
Glessula orobia (W.H. Benson, 1856)
Glessula orophila (L.A. Reeve, 1849)
Bacillum orthoceras (H.H. Godwin-Austen)
Leptinaria orysa (J.G. Bruguière, 1789)
Homorus osborni H.A. Pilsbry, 1919
Curvella ovata (S. Putzeys, 1899)
Obeliscus owengriffithsi Thach & F. Huber, 2017
Glessula pachycheila (W.H. Benson, 1853)
Glessula pachycheila taprobanica H.A. Pilsbry, 1908
Lamellaxis pachyspira H.A. Pilsbry, 1905
Prosopeas paioense F.S. Bock, 1881
Rumina paivae R.T. Lowe, 1861
Glessula pallens R.H. Beddome, 1906
Lamellaxis pallidus (C.B. Adams, 1845)
Leptinaria paludinoides (A.V.M.D. D'Orbigny,1842)
Glessula panaetha (W.H. Benson, 1860)