Falsitromina simplex (A.W.B. Powell, 1951)
Buccinum simulatum W.H. Dall, 1907
Buccinum sinanoense J. Makiyama, 1927
Prosipho sindemarkae W. Engl, 2003
Pseudoneptunea sindonata (FOSSIL) Wrigley †
Pseudofax sinusigera (FOSSIL) Finlay & J. Marwick,1937 †
Latisipho siphonoidea (W.H. Dall, 1913)
Serratifusus sitanius K. Fraussen & R. Hadorn,2003
Neptunea smirnia (W.H. Dall, 1919)
Anomacme smithi H. Strebel, 1905
Eosipho smithi (M.M. Schepman, 1911)
Buccinum solenum W.H. Dall, 1919
Calliloncha solida V.J. Lus, 1978
Engina solida W.H. Dall, 1917
Buccinopsis solida (FOSSIL) B. Wade, 1917 †
Buccinum solidum A.N. Golikov & B.I. Sirenko,1988
Euthria solifer K. Fraussen & R. Hadorn,2003
Pseudofax solitaria (FOSSIL) Chiesa & al., 1995 †
Pisania solomonensis E.A. Smith, 1876
Euthria somalica (M. Parth, 1999)
Pollia sondeiana (FOSSIL) K. Martin, 1895 †
Chauvetia soni (J.G. Bruguière, 1789)
Euthria soniae E. Rolán, A. Monteiro& K. Fraussen, 2003
Retimohnia sordida (W.H. Dall, 1907)
Pollia sowerbyana (J.C. Melvill & R. Standen,1903)
Pollia sowerbyana vicdani (S. Kosuge, 1984)
Siphonalia spadicea (L.A. Reeve, 1847)
Siphonalia spadicea filosa A. Adams, 1863
Siphonalia spatiosa (FOSSIL) R. Tate, 1888 †
Cantharus speciosus (FOSSIL) E.W. Vredenburg, 1923 †
Nassicola speighti (FOSSIL) (J. Marwick, 1932 †)
Engina spica J.C. Melvill & R. Standen,1895
Engina spica mactanensis W.O. Cernohorsky, 1985
Austrofusus spinifera (FOSSIL) Finlay & McDowall, 1923 †
Clea spinosa P. Temcharoen, 1971