Oxyrhombus sanguinea (L. Pfeiffer, 1849)
Helicina saxoniana J.D.W. Hartmann, 1889
Helicina schereri F.C. Baker, 1913
Helicina schlueteri A.J. Wagner, 1905
Helicina schlueteri chanchamayensis A.J. Wagner, 1911
Blandia schomburghkiana E. Chitty, 1857
Alcadia schrammi (J.C.H. Crosse, 1872)
Troschelviana scopulorum (P.M.A. Morelet, 1849)
Pleuropoma scrupula (W.H. Benson)
Tristramia senachuensis (A.J. Wagner, 1905)
Helicina serina H.B. Preston, 1914
Fadyenia shuttleworthiana E. Chitty, 1857
Geophorus siargaoensis P. Bartsch, 1918
Emoda silacea (P.M.A. Morelet, 1849)
Pyrgodomus simpsoni (C.M.F. Ancey, 1886)
Helicina simulans A. Garrett, 1884
Fadyenia sinclairiana E. Chitty, 1857
Alcadia siniae G.P. Deshayes
Palaeohelicina sinus (C. Hedley, 1891)
Helicina siolii F. Haas, 1949
Ustronia sloanii (A.V.M.D. D'Orbigny,1842)
Helicina solida W.H. Pease, 1865
Orobophana solidula (L. Pfeiffer, 1851)
Orobophana solidula raiateae A.J. Wagner, 1905
Alcadia solitaria C.B. Adams, 1845
Helicina sordida P.P. King, 1831
Oxyrhombus sowerbyana (L. Pfeiffer, 1849)
Pleuropoma spatei J. Stanisic, 2010
Alcadia spectabilis (L. Pfeiffer, 1858)
Helicina sphaeroidea L. Pfeiffer
Eutrochatella sphaerula P. Bartsch, 1932
Ceratopoma spinifera L. Pfeiffer
Troschelviana spinipoma (C.G. Aguayo, 1943)
Helicina sprucei L. Pfeiffer, 1857
Priotrochatella stellata (G.T. Velazquez in F. Poey,1852)