Platycochlium sarawakense F.F. Laidlaw, 1950
Platycochlium saulae S.P. Dance, 1970
Streptaxis scalptus (W.T. Blanford, 1899)
Tanzartemon seddonae P. Tattersfield & B. Rowson,2011
Gulella selene A.C. van Bruggen& J.L. Van Goethem, 1999
Parvedentulina setra K.C. Emberton & T.A. Pearce,2000
Gulella sexdentata (E.C. Von Martens, 1869)
Ptychotrema shagamuense (O.C. Oke & Odiete, 1996)
Tayloria shimbiensis M. Connolly, 1923
Perrottetia siamensis (L. Pfeiffer, 1862)
Silhouettia silhouettae (E.C. Von Martens, 1898)
Glabrennea silhouettensis B. Verdcourt, 1994
Ennea silvaticum H.A. Pilsbry, 1919
Parvedentulina simeni (E. Fischer-Piette, Ch.P. Blanc, F. Blanc& F. Salvat, 1994)
Perrottetia simoniana (P.M. Heude, 1890)
Parvedentulina simplex K.C. Emberton, 2002
Elma sinensis O.F. von Möllendorff,1886
Haploptychius sinensis A.A. Gould
Haploptychius sinuosa (L. Pfeiffer, 1861)
Goniodomulus solaniformis (FOSSIL) M. Harzhauser& T.A. Neubauer, 2016 †
Gulella soulaiana E. Fischer-Piette, 1973
Seychellaxis souleyetianus (S.A.A. Petit De La Saussaye, 1841)
Parvedentulina species
Juventigulella spinosa P. Tattersfield, 1998
Rectartemon spixianus (L. Pfeiffer, 1841)
Discartemon stenostomus W.S.S. Van Benthem-Jutting,1954
Streptartemon streptodon (S. Moricand, 1851)
Gulella streptosteleopsis A.C. van Bruggen, 2007
Gonospira striaticostus P.M.A. Morelet, 1866
Tonkinia struposa (J.F. Mabille, 1887)
Gulella suavissima (H.B. Preston, 1913)
Streptaxis subacutus (W.T. Blanford, 1899)
Gulella subhyalina (E.A. Smith)
Streptaxis subregularis L. Pfeiffer, 1845
Gulella subringens (J.C.H. Crosse, 1886)