Prunum saulcyanum (S.A.A. Petit De La Saussaye, 1851) Brazil, Sao Tomé18 mm
Volvarina sauliae (G.B. II Sowerby, 1846) Mauritius7,3 mm
Marginella scalariformis P.L. Duclos
Eratoidea scalaris (F.P. Jousseaume, 1875) Brazil, Cabo Frio3 mm
Dentimargo scapulatus Boyer, 2017
Mesoginella schoutanica (W.L. May, 1913) Tasmania
Hydroginella scintilla (F.P. Jousseaume, 1875) Australia, Port Jackson6,1 mm
Cryptospira scripta (R.B. Hinds, 1844) Andaman Islands9,3 mm
Marginella sebastiani I. Marche-Marchad& J. Rosso, 1979 Senegal, Dakar40,6 mm
Volvarina sebastieni J. Espinosa & J.A. Ortea,2012 Guadeloupe7,6 mm
Marginella seccombei A. Wakefield, 2012
Marginella seguenzai (FOSSIL) R. La Perna & Vazzana,2016 † Italy
Bullata semen (FOSSIL) (Lea, 1833 †) United States, Alabama, Clarke
Paolaura semistriata C. Smriglio& P. Mariottini, 2001
Marginella senegalensis P.W. Clover, 1990 Morocco, cap Cantin25 mm
Marginella sergioi L. Bozzetti, 1997 Mozambique, Quissico10,2 mm
Serrata serrata (J.S. Gaskoin, 1849) Réunion9 mm
Pugnus serrei (A.R.J.B. Bavay, 1911) Florida Keys1 mm
Volvarina serrei (A.R.J.B. Bavay, 1913) Brazil, Bahia9 mm
Volvarina shlegeli L. Bozzetti, 2017 Philippines, Aliguay Island3,2 mm
Granulina signata M. Pin & F. Boyer, 1995
Euryentome silabra (FOSSIL) K.V.W. Palmer, 1937 † USA, Alabama, Monroe
Marginella silicifluvia (FOSSIL) W.H. Dall, 1916 † USA, Georgia, Decatur
Serrata simplex F. Boyer, 2008 New Caledonia, Ile des Pins4,3 mm
Marginella simplicissima (FOSSIL) Martin, 1879 † Indonesia, Junghuhn
Marginella simulata S. Gofas & F. Fernandes,1994 Angola5,6 mm
Mesoginella sinapi (C.F. Laseron, 1948) Australia, Sydney3 mm
Marginella singuensis (FOSSIL) E.W. Vredenburg, 1921 † Myanmar, Mandalay, Myingyan
Marginella singularis S.G. Veldsman, 2016 South Africa, Port Elizabeth9,4 mm
Eratoidea sinuosa (L. Bozzetti, 1997) Zanzibar Island2 mm
Serrata sinuosa F. Boyer, 2008 New Caledonia7,1 mm
Marginella slateri M. Lussi, 2017 South Africa, Durban19 mm
Prunum smalli J. Espinosa & J.A. Ortea,2002
Dentimargo smithii (A.E. Verrill, 1885)
Volvarina snyderi J. Espinosa & J.A. Ortea,2012 Guadeloupe7,8 mm