Drillia terebra (FOSSIL) (B. de Basterot, 1825 †)
Fenimorea tessellata P.J. Fallon, 2016
Iredalea thalycra (J.C. Melvill & R. Standen,1896)
Cerodrillia thea (W.H. Dall, 1884)
Drillia theobroma (FOSSIL) A.A. Olsson, 1922 †
Iredalea theoteles (J.C. Melvill & R. Standen,1896)
Drillia tholos K.H. Barnard, 1958
Cymatosyrinx tiara (FOSSIL) Gardner, 1948 †
Fenimorea tippetti P.J. Fallon, 2016
Clathrodrillia tityra (FOSSIL) W.P. Woodring, 1928 †
Elaeocyma tjibaliungensis Y. Otuka, 1937
Spirotropis tmeta (R.B. Watson, 1881)
Calliclava tobagoensis P.J. Fallon, 2016
Agladrillia torquata P.J. Fallon, 2016
Drillia torresiana E.A. Smith, 1884
Clathrodrillia totocostata (FOSSIL) B.M. Landau, F. Da Silva& S.M. Heitz, 2016 †
Syntomodrillia triangulos P.J. Fallon, 2016
Bellaspira tricolor P.J. Fallon, 2016
Splendrillia triconica F.E. Wells, 1995
Drillia tridadina (FOSSIL) W.C. Mansfield, 1925 †
Drillia trimitrodita (FOSSIL) J. Gardner, 1937 †
Syntomodrillia trinidadensis P.J. Fallon, 2016
Drillia tripter H.F. Von Maltzan, 1883
Clathrodrillia tryonii (W.H. Dall, 1889)
Drillia trypanion (FOSSIL) J. Gardner, 1937 †
Drillia tumida J.H. McLean & L.H. Poorman,1971
Lissodrillia turgida P.J. Fallon, 2016
Splendrillia turrita (F.E. Wells, 1995)
Agladrillia ukuminxa R.N. Kilburn, 1988
Globidrillia ula (FOSSIL) W.P. Woodring, 1928 †
Drillia umbilicata Gray, 1847
Austroclavus undatus (FOSSIL) (C. Hedley, 1907 †)
Imaclava unimaculata (G.B. I Sowerby, 1834)
Clavus unizonalis (J.B.P.A. Lamarck, 1822)
Fenimorea ustickei (G.W. Nowell-Usticke,1959)