Littoraria rosewateri D.G. Reid, 1999
Cenchritis rugosus (W. Wood, 1828)
Tectarius rusticus (R.A. Philippi, 1846)
Melarhaphe sacyi (FOSSIL) (A.E.M. Cossmann& M.A. Peyrot, 1919 †)
Echinolittorina santelenae (D.G. Reid, 2002)
Littorina saxatilis (A.G. Olivi, 1792)
Littorina saxatilis lutea P. Dautzenberg& P. Durouchoux, 1900
Littorina saxatilis neglecta W.I. Bean, 1844
Littorina saxatilis nervillei P. Dautzenberg, 1893
Littorina saxatilis tenebrosa (G. Montagu, 1803)
Littoraria scabra (C. Linnaeus, 1758)
Littoraria scabra alberti (FOSSIL) F. Dujardin †
Littorina scutulata Gould, 1849
Littorina seminole (FOSSIL) E.J. Petuch, 1991 †
Littorina serialis J.F.T. Eydoux& L.F.A. Souleyet, 1852
Lacuna setonaikaiensis (T. Habe, 1958)
Pellilitorina setosa (E.A. Smith, 1875)
Littorina sheaferi (FOSSIL) A.A. Olsson, 1967 †
Littoraria sinensis (R.A. Philippi, 1847)
Littorina sitkana R.A. Philippi, 1846
Littorina sitkana atkana W.H. Dall, 1902
Lacuna smithii H.A. Pilsbry, 1895
Littorina sookensis (FOSSIL) Clark & R. Arnold, 1923 †
Echinolittorina soroziczac D.G. Reid, 2011
Tectarius spinulosus (R.A. Philippi, 1847)
Littorina squalida W.J. Broderip& G.B. I Sowerby, 1829
Lacuna striata (FOSSIL) W.M. Gabb, 1869 †
Tectarius striatus (P.P. King, 1832)
Littoraria strigata (FOSSIL) (C.E. Lischke †)
Littoraria strigata (R.A. Philippi, 1846)
Littoraria subangulata (FOSSIL) G.P. Deshayes, 1861 †
Lacuna subeffusa (FOSSIL) C.L.F. von Sandberger,1859 †
Echinolittorina subnodosa (R.A. Philippi, 1847)
Littorina subrotundata (P.P. Carpenter, 1864)
Littoraria subvittata D.G. Reid, 1986