Tropidophora sericea R.J. Griffiths& D.G. Herbert, 2013 Madagascar37,3 mm
Parachondria sericina (C.B. Adams, 1851) Jamaica
Parachondria sericina retreatensis (H.B. Baker, 1934) Jamaica16,6 mm
Parachondria sheppardiana (C.B. Adams, 1850) Jamaica
Chondrothyretes shuttleworthi (L. Pfeiffer, 1851) Cuba
Chondrothyretes shuttleworthi portica (C. de la Torre& P. Bartsch, 1938) Cuba24 mm
Bermudezia sifontesi (C. de la Torre& P. Bartsch, 1941) Cuba
Parachondria silvatica G.T. Watters, 2016
Tudora similis J.E. Gray in G.B. Sowerby, 1850
Chondropomorus simplex L. Pfeiffer Haiti10,2 mm
Opisthosiphon simpsoni P. Bartsch, 1946 Bahamas
Opisthosiphon simpsoni williamsae G.T. Watters & G. Duffy,2010 Bahamas
Torrellisca simpsoni J. Henderson& P. Bartsch, 1920 Bahamas
Opisthocoelicum simulans C. de la Torre& P. Bartsch, 1941 Jamaica
Turrithyra sinuosa (B.H. Wright in L. Pfeiffer, 1862) Cuba26 mm
Turrithyra sinuosa hutia (C. de la Torre& P. Bartsch, 1938) Cuba18,02 mm
Turrithyra sinuosa rhachitica (C. de la Torre& P. Bartsch, 1938) Cuba16 mm
Turrithyra sinuosa vicina C. de la Torre& P. Bartsch, 1938 Cuba23 mm
Tropidophora socotrana (H.H. Godwin-Austen,1881) Yemen, Socotra10,6 mm
Tropidophora socotrana serrulata E. Neubert, 2009 Yemen, Socotra9,3 mm
Chondropoma solidulum (J. Gundlach in L. Pfeiffer, 1860) Cuba10,8 mm
Chondropoma solidulum vitaense C. de la Torre& P. Bartsch, 1938 Cuba
Chondropoma solum P. Bartsch, 1946 Dominican Republic
Leiabbottella soluta (L. Pfeiffer, 1852) Dominican Republic7 mm
Cyclostoma sordidum (J. Gundlach, 1857) Cuba
Opisthosiphon sosai C. de la Torre& P. Bartsch, 1941 Cuba
Abbottella sosuaensis (P. Bartsch, 1946) Dominican Republic7 mm
Tropidophora soulaiana E. Fischer-Piette& A.M. Testud, 1973 Madagascar, Antalaha
Lithidion souleyetianum (S.A.A. Petit De La Saussaye, 1850) Yemen, Socotra Island8 mm
Tropidophora sowerbyi L. Pfeiffer Kenya
Licina spencei G.T. Watters & G. Duffy,2010 Dominican Republic
Xenopoma spinosissimum C. de la Torre& P. Bartsch, 1941 Cuba
Annularia spinulosa C.B. Adams, 1849 Jamaica
Cyclotopsis spurca (J.P.S. Grateloup, 1839) India, Bombay
Cyclostoma squamosum (FOSSIL) M.A. Peyrot, 1933 † France, Aquitaine17 mm