Helicina rawsoni (L. Pfeiffer, 1867)
Fadyenia redfieldiana (C.B. Adams, 1849)
Helicina reeveana L. Pfeiffer, 1848
Pleuropoma reflexilabiata J. Stanisic, 2010
Viana regina (P.M.A. Morelet, 1849)
Viana regina laevigata L. Pfeiffer, 1865
Viana regina marmorata (C. de la Torre, 1950)
Viana regina multistriata (L. Pfeiffer, 1852)
Viana regina subunguiculata (F. Poey, 1859)
Eutrochatella remota (F. Poey, 1858)
Ogasawarana rex H. Minato, 1980
Helicina rhodostoma J.E. Gray, 1824
Helicina rhynchostoma (R.J. Shuttleworthin L. Pfeiffer, 1865)
Pleuropoma richardson J. Stanisic, 2010
Fadyenia riiseana E. Chitty, 1857
Pleuropoma rogersi (A.G. Bourne)
Orobophana rohri (L. Pfeiffer, 1848)
Tristramia rostrata (P.M.A. Morelet, 1849)
Pleuropoma rotelloidea (J.W. Mighels, 1845)
Alcadia rotunda (A.V.M.D. D'Orbigny,1842)
Helicina rotundata A.J. Wagner, 1910
Helicina rubicunda W.H. Pease, 1868
Troschelviana rubromarginata (J. Gundlach in F. Poey,1858)
Lucidella rugosa (L. Pfeiffer, 1839)
Troschelviana rupestris (L. Pfeiffer, 1839)
Hemipoma sadoense (H.A. Pilsbry & Y. Hirase,1903)
Emoda sagraiana (A.V.M.D. D'Orbigny,1842)
Emoda sagraiana percrassa C.G. Aguayo & M.L. Jaume,1954
Alcadia sakurai T. Habe, 1976
Poeniella salishora R.C. Pierce, 2001
Fadyenia salleana E. Chitty, 1857
Lucidella samana H.A. Pilsbry, 1928
Pleuropoma samoana (A.J. Wagner, 1911)
Helicina sanctaemarthae H.A. Pilsbry & W.F. Clapp,1902
Emoda sangraiana (A.V.M.D. D'Orbigny,1842)