Cavellia serpentinula (H.H. Suter, 1891) New Zealand, Auckland
Therasiella serrata R.A. Cumber, 1967 Seychelles
Setomedea seticostata (C. Hedley, 1924) New South Wales
Helenoconcha sexdentata unknown Saint Helena
Ptychodon skottsberg N.H. Odhner, 1921 Chile, Alejandro Selkirk island
Rotadiscus smithae (R.K. Dell, 1954) New Zealand
Allodiscus smithi H.H. Suter, 1894 New Zealand
Coenocharopa sordidus J. Stanisic, 1990 Queensland
Penescosta sororcula (H.B. Preston, 1913) Norfolk Island
Allodiscus southlandicus B.A. Marshall& G.M. Barker, 2008 New Zealand, South Island
Mocella spelaeus (F.M. Climo, 1971) New Zealand, Takaka
Roblinella speranda T. Iredale, 1937 Queensland
Allodiscus spiritus A.W.B. Powell, 1952 New Zealand
Pseudohelenoconcha spurca (G.B. Sowerby, 1844) Saint Helena
Reticulapex stanisici K.C. Emberton& R.J. Griffiths, 2009 Madagascar, Andriantantely
Cavellia sterkiana (H.H. Suter, 1891) New Zealand, Mount Cook
Flammoconcha stewartensis R.K. Dell, 1952 New Zealand
Phacussa stewartensis (P. David, 1934) New Zealand
Aeschrodomus stipulatus (L.A. Reeve, 1852) New Zealand, Stewart Island3 mm
Cralopa stroudensis (J.C. Cox, 1864) New South Wales2,9 mm
Charopinesta suavis T. Iredale, 1944 Australia, Lord Howe Island
Reticulapex subangulatus K.C. Emberton& T.A. Pearce, 2000 Madagascar, Tulear
Cavellioropa subantialba (H.H. Suter, 1890) New Zealand
Chaureopa subdepressa F.M. Climo, 1985 Australia, Victoria
Thermia subincarnata (H.H. Suter, 1894) New Zealand
Cavellia subinfecta (H.H. Suter, 1899)
Luinodiscus sublesta (W.H. Benson, 1853) Western Australia
Dentherona subrugosa (C.M.D.E. Legrand, 1871) Tasmania
Mitodon suteri (R. Murdoch& H.J. Finlay, 1923) New Zealand, South Island
Cavellia sylvia (F.W. Hutton, 1883) New Zealand, Canterbury
Trachycystis sylvicola A.C. van Bruggen& B. Verdcourt, 1965 Mozambique
Sinployea taipara F.J. Brook, 2010
Rotadiscus takakaensis (F.M. Climo, 1981) New Zealand
Pilula talatai K.C. Emberton, 1994 Madagascar
Pernagera tamarensis (W.F. Petterd, 1879) Tasmania