Phorculus sulcatus distans (FOSSIL) (J.B.P.A. Lamarck,1804 †)
Umbonium suturale (J.B.P.A. Lamarck, 1822)
Prothalotia suturalis (A. Adams, 1853)
Callumbonella suturalis (R.A. Philippi, 1836)
Trochus sybilla (FOSSIL) Hudleston †
Oxystele tabularis (C.F.F. von Krauss, 1848)
Enida taiwanensis Z.Z. Dong, 2002
Pseudotalopia taiwanensis (C. Chen, 2006)
Gibbula tantilla T.A. de M. Monterosato,1890
Nanula tasmanica (W.F. Petterd, 1879)
Cantharidus tenebrosus (A. Adams, 1853)
Trochus tentorium J.F. Gmelin, 1791
Gibbula tenuilirata H.B. Preston, 1909
Stomatella terminalis (J.C. Verco, 1905)
Cantharidus tesselatus (A. Adams, 1853)
Clanculus thomasi J.C.H. Crosse, 1862
Umbonium thomasi (J.C.H. Crosse, 1863)
Trochus tiara (FOSSIL) J.L.M. Defrance †
Thalotia tiaraeides C. Vilvens, 2012
Coelotrochus tiaratus (J.R.C. Quoy& J.P. Gaimard, 1834)
Trochus tiarellus (FOSSIL) Tate, 1875 †
Trochus tibai J.T. Kuroda, 1954
Cantharidella tiberiana (J.C.H. Crosse, 1863)
Oxystele tigrina (H.E. Anton, 1838)
Trochus tihensis (FOSSIL) Abbass, 1967 †
Gibbula tingitana P.M. Pallary, 1901
Infundibulum tomlini (H.C. Fulton, 1930)
Inkaba tonga D.G. Herbert, 1992
Clanculus tonnerrei (G. Nevill & H. Nevill,1874)
Chrysostoma tornatum (FOSSIL) C. Gemmellaro, 1889 †
Austrocochlea torri B.C. Cotton & F.C. Godfrey,1934
Trochus toulai (FOSSIL) E.A.L. Kittl, 1891 †
Enida townsendi G.B. III Sowerby, 1895
Vanitrochus tragema (J.C. Melvill & R. Standen,1896)
Pseudominolia tramieri G.T. Poppe, S.P. Tagaro& H. Dekker, 2006