Tornatellinops norfolkensis (H.B. Preston, 1913)
Tornatellinops noumeensis (J.C.H. Crosse, 1874)
Tornatellinops novoseelandica (L. Pfeiffer, 1853)
Tornatellides oahuensis C.M. Cooke & H.A. Pilsbry,1915
Lamellidea oblonga (W.H. Pease, 1865)
Tornatellides oblongus (H.E. Anton, 1839)
Tornatellides oblongus parvulus C.M. Cooke & Y. Kondo,1960
Tornatellaria occidentalis H.A. Pilsbry & C.M. Cooke,1916
Lamellidea ogasawarana H.A. Pilsbry & C.M. Cooke,1915
Tornatellides oncospira C.M. Cooke & H.A. Pilsbry,1915
Strobilus opeas C.M. Cooke & Y. Kondo,1960
Strobilus opeas intermedius C.M. Cooke & Y. Kondo,1960
Perdicella ornata (W. Newcomb, 1854)
Tornatellides oswaldi C.M. Cooke & Y. Kondo,1961
Elasmias ovatulum (O.F. von Möllendorff,1900)
Elasmias ovatum (H.E. Anton, 1839)
Pitys pagodiformis (E.A. Smith, 1892)
Achatinella papyracea J.T. Gulick, 1856
Elasmias peasianum (A. Garrett, 1884)
Pukunia pellucida C.M. Cooke & Y. Kondo,1960
Lamellidea peponum (A.A. Gould, 1847)
Partulina perdix (L.A. Reeve, 1850)
Tautautua perfragilis C.M. Cooke & Y. Kondo,1960
Mangaoa perissa C.M. Cooke & Y. Kondo,1960
Newcombia perkinsi E.R. Sykes, 1896
Tornatellides perkinsi (E.R. Sykes, 1900)
Tubuaia perplexa (A. Garrett, 1879)
Auriculella perpusilla E.A. Smith, 1873
Auriculella perversa C.M. Cooke, 1915
Auriculella petitiana (L. Pfeiffer, 1847)
Achatinella petricola L. Pfeiffer, 1855
Newcombia pfeifferi (W. Newcomb, 1853)
Antonella pfeifferi C.M. Cooke & Y. Kondo,1960
Achatinella phaeozona J.T. Gulick, 1856
Newcombia philippiana L. Pfeiffer, 1857