Marinula rhoadsi H.A. Pilsbry, 1910
Cassidula rhodostoma J.B. Hombron& C.H. Jacquinot, 1848
Carychium riparium L.R. Hubricht, 1978
Carychium rufolabiatum (FOSSIL) De Stefani, 1880 †
Cassidula rugata (J.F. Gmelin, 1791)
Auriculastra saccata (L. Pfeiffer, 1856)
Carychium sandbergeri (FOSSIL) Handmann, 1887 †
Pedipes sandwicensis W.H. Pease, 1860
Pythia savaiensis (A. Mousson, 1869)
Pythia scarabaeus (C. Linnaeus, 1758)
Zospeum schaufussi (G.R. von Frauenfeld,1862)
Carychium schlickumi F. Strauch, 1977
Cassidula schmackeriana O.F. von Möllendorff,1885
Carychiopsis schwageri (FOSSIL) (A.E. Reuss, 1868 †)
Ellobium sciuri R.P. Lesson, 1831
Melampus sculptus L. Pfeiffer, 1850
Ellobium sedgvici (FOSSIL) Phillips, 1829 †
Melampus semiaratus M. Connolly, 1912
Melampus semiauratus M. Connolly, 1912
Auriculastra semiplicata (H. Adams & A. Adams,1854)
Ellobium semisculptum (H. Adams & A. Adams,1854)
Melampus semisulcatus A. Mousson, 1869
Laemodonta siamensis (P.M.A. Morelet, 1875)
Carychiella sibiricum (C.A. Westerlund, 1897)
Melampus sincaporensis L. Pfeiffer, 1855
Ellobium soricina J.B. Hombron& C.H. Jacquinot, 1848
Laemodonta souverbiei R.P. Montrouzier, 1862
Cassidula sowerbyana (J.F. Gmelin, 1791)
Carychium sparnacense (FOSSIL) Deshayes, 1863 †
Zospeum spelaeum (E.A. Rossmässler, 1839)
Ellobium stagnale D'Orbigny, 1835
Carychium starobogatovi (FOSSIL) Steklov, 1966 †
Laemodonta striata (R.A. Philippi, 1846)
Marinula striata N.H. Odhner, 1924
Melampus striatus W.H. Pease, 1861