Nassaria tarta K. Fraussen, 2006
Nassarius tatei (FOSSIL) J.E. Tenison-Woods,1878 †
Nassarius tateyamensis J.T. Kuroda, 1929
Keepingia tejonensis (FOSSIL) (R.E. Dickerson, 1915 †)
Nassarius telleri (FOSSIL) (R. Hoernes & Aulinger,1882 †)
Phos temperatus K. Fraussen & G.T. Poppe,2005
Tritia tenuicosta (M.E.J. Bucquoy, P. Dautzenberg& G.F. Dollfus, 1882)
Bullia tenuis L.A. Reeve, 1846
Nassarius tenuistriatus (FOSSIL) (A.H.E. Beyrich, 1854 †)
Bullia terebraeformis (P. Dautzenberg, 1912)
Tritiaria terebratula (FOSSIL) (A.A. Olsson, 1928 †)
Nassaria teres E.C. Von Martens, 1902
Nassarius teretiusculus (A. Adams, 1852)
Nassaria termesoides K. Fraussen, 2006
Uzita terryi (FOSSIL) A.A. Olsson, 1942 †
Nassarius tersus (FOSSIL) (L.M.D. Bellardi, 1882 †)
Phos textilis A. Adams, 1851
Phos textum (J.F. Gmelin, 1791)
Nassarius thachi H. Dekker, 2004
Nassarius thachorum Dekker,Kool & van Gemert, 2016
Reticunassa thailandensis L.A. Galindo, H.H. Kool& H. Dekker, 2017
Nassaria thalassomeli K. Fraussen & G.T. Poppe,2007
Nassarius thaumasius (R. Sturany, 1900)
Phos thayerae (FOSSIL) Smith, 1936 †
Nassaria thesaura K. Fraussen & G.T. Poppe,2007
Nassarius thielei (FOSSIL) A.A. Olsson, 1964 †
Nassarius tiarula (L.C. Kiener, 1841)
Tritia tinei (C. Maravigna, 1840)
Tritia tingitana (P.M. Pallary, 1901)
Nassarius toulai (FOSSIL) Hilber, 1879 †
Nassarius toulai poelsensis (FOSSIL) M. Auinger †
Bullia townsendi J.C. Melvill, 1912
Nassarius townsendi (W.H. Dall, 1880)
Bullia tranquebarica (P.F. Röding, 1798)
Nassarius transitens (FOSSIL) L.M.D. Bellardi, 1882 †