Agladrillia nitens (R.B. Hinds, 1843)
Austroclavus nitens (FOSSIL) (P. Marshall, 1918 †)
Drillia nitrina (FOSSIL) W.C. Mansfield, 1925 †
Fenimorea nivalis P.J. Fallon, 2016
Clavus nodifera (W.H. Pease, 1860)
Drillia nodilirata E.A. Smith, 1877
Austroclavus nodulatus (FOSSIL) C.R. Laws, 1948 †
Clavus nodulosa (W.H. Pease, 1863)
Cymatosyrinx nodulosa (J.G. Jeffreys, 1882)
Splendrillia nomurai (FOSSIL) F.S. MacNeil, 1960 †
Fusiturricula notilla (W.H. Dall, 1908)
Clathrodrillia noventa (FOSSIL) H.A. Pilsbry& A.A. Olsson, 1941 †
Orrmaesia nucella R.N. Kilburn, 1988
Clathrodrillia nuevagranada (FOSSIL) N.E. Weisbord, 1929 †
Cerodrillia nysti (FOSSIL) (F.W. Harmer, 1915 †)
Stenodrillia obeliscus (FOSSIL) (C. des Moulins, 1842 †)
Clavus obliquatus (L.A. Reeve, 1845)
Clavus obliquicostatus (L.A. Reeve, 1845)
Clavus obliquicostatus leforestieri (R.P.J. Hervier, 1896)
Splendrillia obscura A.V. Sysoev, 1990
Drillia obtusa (FOSSIL) A. von Koenen †
Clavus obtusangulus (FOSSIL) (G.B. Brocchi, 1814 †)
Cerodrillia occidua P.J. Fallon, 2016
Clavus occiduus F.E. Wells, 1991
Drillia ochroleuca J.C. Melvill & E.R. Sykes,1897
Drillia oleacina (W.H. Dall, 1881)
Drillia oliverai R.N. Kilburn& P. Stahlschmidt, 2012
Drillia omanensis J.C. Melvill & R. Standen,1901
Plagiostropha opalus (L.A. Reeve, 1845)
Clathrodrillia orellana W.H. Dall, 1927
Splendrillia otagoensis A.W.B. Powell, 1942
Drillia pachycheila (FOSSIL) J. Gardner, 1937 †
Fenimorea pagodula (W.H. Dall, 1889)
Fusiturricula pagodula (FOSSIL) R.F. Rutsch, 1934 †
Calliclava pallida (G.B. I Sowerby, 1834)