Cochlis tigrina (FOSSIL) (J.L.M. Defrance, 1825 †)
Pliconacca tortonensis (FOSSIL) E. Robba, Pedriali& E. Quaggiotto, 2016 †
Tanea tosaensis (J.T. Kuroda, 1961)
Natica tournoueri (FOSSIL) Leymerie, 1878 †
Gyrodes tramitensis (FOSSIL) L.W. Stephenson, 1952 †
Notocochlis tranquilla (J.C. Melvill & R. Standen,1901)
Natica transiens (FOSSIL) E.A.L. Kittl, 1892 †
Natica tremarieri (FOSSIL) R. Tate, 1900 †
Amauropsis trinitatensis (FOSSIL) W.C. Mansfield, 1925 †
Euspira triseriata (T. Say, 1826)
Pliconacca trisulcata (FOSSIL) Martin, 1914 †
Natica tumidula (FOSSIL) Wood, 1879 †
Euspira tuomeyi (FOSSIL) (R.P. Whitfield, 1894 †)
Natica turbilina (FOSSIL) Münster, 1841 †
Euspira turbinata (FOSSIL) G.P. Deshayes, 1864 †
Natica turbinoides (FOSSIL) J.P.S. Grateloup, 1827 †
Natica turtoni E.A. Smith, 1890
Amauropsis tyrolensis (FOSSIL) Laube, 1868 †
Polinices uber (A. Valenciennes, 1832)
Polinices uberinus (A.V.M.D. D'Orbigny,1842)
Eunaticina umbilicata (J.R.C. Quoy& J.P. Gaimard, 1832)
Euspira umbilicocarinata (FOSSIL) E. Robba, Pedriali& E. Quaggiotto, 2016 †
Euspira umbilicolunata (FOSSIL) E. Robba, Pedriali& E. Quaggiotto, 2016 †
Cochlis undata (FOSSIL) (A. Sasso, 1827 †)
Tanea undulata (P.F. Röding, 1798)
Natica unibalteata J.Y. Liu, 1977
Natica unifasciata J.B.P.A. Lamarck, 1822
Sinum unifasciatus C.A. Récluz, 1843
Polinices unisulcatus (FOSSIL) (J. Marwick, 1924 †)
Natica varians (FOSSIL) R. Tate, 1893 †
Natica varians meridionalis (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1921 †
Friginatica vaughani (FOSSIL) (J. Marwick, 1924 †)
Polinices vavaosi (L.A. Reeve, 1855)
Natica velledae (FOSSIL) J.F. Bayan, 1870 †
Natica venusta (FOSSIL) G.P. Deshayes, 1864 †