Bulimulus semicinctus H.A. Pilsbry, 1897 Guadeloupe
Drymaeus semifasciatus A. Mousson, 1869 South America
Mesembrinus semimaculatus H.A. Pilsbry, 1898 Panama
Mesembrinus semimaculatus perversus H.A. Pilsbry, 1926 Panama
Mesembrinus semipellucidus H.B. Tristram, 1861 Nicaragua
Drymaeus semistriatus F. Haas, 1955 Brazil, Sao Paulo
Drymaeus sentatus Á. De Oliveira, Silveira e Sá& E.C. de A. Bessa, 1992 Brazil, Paraná
Bulimulus sepulchralis F. Poey, 1850 Cuba
Drymaeus serenus R.A. Philippi, 1867 Peru
Bostryx serotinus (P.M.A. Morelet, 1860) Peru33,8 mm
Drymaeus serperastrus (T. Say, 1829) Mexico, Campeche31 mm
Drymaeus serratus (L. Pfeiffer, 1855) Peru26,3 mm
Mesembrinus shattucki J.C. Bequaert& W.J. Clench, 1931 Mexico, Yucatan
Otostomus signatus (J.B. von Spix, 1827) Brazil, Bahia35,8 mm
Mesembrinus signifer (L. Pfeiffer, 1855) Venezuela32,9 mm
Naesiotus silvaevagus W.K. Weyrauch, 1960 Peru, Junin
Drymaeus silvanus A. Zilch, 1953 Peru
Drymaeus similaris S. Moricand, 1856 Peru
Bulimulus simplex H.H. Beck, 1837 Antilles
Bostryx simpliculus L. Pfeiffer, 1855 Bolivia18,9 mm
Naesiotus simrothi (P.H. Reibisch, 1892) Galapagos10 mm
Scutalus simulans M.I. Hylton-Scott, 1951 Bolivia
Auris sinuata (J.A. Albers, 1854) Venezuela
Drymaeus siolii F. Haas, 1952 Jamaica
Scutalus smidti F. Haas, 1955 Peru
Drymaeus smithii S.I. Da Costa, 1898 Colombia29,5 mm
Naesiotus snodgrassi W.H. Dall, 1900 Galapagos
Drymaeus solidus (H.B. Preston, 1907) Colombia, Bogotà32,8 mm
Bostryx solutus F.H. Troschel, 1847 Peru, Lima8,66 mm
Rabdotus sonorensis H.A. Pilsbry, 1928 Mexico
Drymaeus sophiae A.S.H. Breure, 1979 South America
Scutalus sordidus (G.P. Deshayes, 1838) Peru
Drymaeus souzalopesi W.K. Weyrauch, 1965 Brazil, Goias
Bulimus sowerbyi L. Pfeiffer, 1847 Colombia21,7 mm
Drymaeus spadiceus S.I. Da Costa, 1906 Colombia, Bogotà37,3 mm