Agladrillia nitens (R.B. Hinds, 1843) Philippines, Mactan Island9,9 mm
Austroclavus nitens (FOSSIL) (P. Marshall, 1918 †)
Drillia nitrina (FOSSIL) W.C. Mansfield, 1925 † Trinidad and Tobago
Fenimorea nivalis P.J. Fallon, 2016
Clavus nodifera (W.H. Pease, 1860) Japan13,3 mm
Drillia nodilirata E.A. Smith, 1877 Philippines, Samar Island21 mm
Austroclavus nodulatus (FOSSIL) C.R. Laws, 1948 †
Clavus nodulosa (W.H. Pease, 1863) Réunion
Cymatosyrinx nodulosa (J.G. Jeffreys, 1882) Mediterranean Sea
Splendrillia nomurai (FOSSIL) F.S. MacNeil, 1960 † Okinawa
Fusiturricula notilla (W.H. Dall, 1908) Gulf of California
Clathrodrillia noventa (FOSSIL) H.A. Pilsbry& A.A. Olsson, 1941 † Ecuador, Manabi
Orrmaesia nucella R.N. Kilburn, 1988 South Africa, KwaZulu, Natal
Clathrodrillia nuevagranada (FOSSIL) N.E. Weisbord, 1929 † Colombia
Cerodrillia nysti (FOSSIL) (F.W. Harmer, 1915 †) Belgium18 mm
Stenodrillia obeliscus (FOSSIL) (C. des Moulins, 1842 †) France, Aquitaine
Clavus obliquatus (L.A. Reeve, 1845) Japan
Clavus obliquicostatus (L.A. Reeve, 1845) Philippines, Palawan Island34 mm
Clavus obliquicostatus leforestieri (R.P.J. Hervier, 1896) New Caledonia15 mm
Splendrillia obscura A.V. Sysoev, 1990 Naska & Gomes Ridges, SE Pacific
Drillia obtusa (FOSSIL) A. von Koenen † Ukraine
Clavus obtusangulus (FOSSIL) (G.B. Brocchi, 1814 †) Italy, Tuscany
Cerodrillia occidua P.J. Fallon, 2016
Clavus occiduus F.E. Wells, 1991 South Africa27,3 mm
Drillia ochroleuca J.C. Melvill& E.R. Sykes, 1897 Philippines
Drillia oleacina (W.H. Dall, 1881) Brazil, Pernambuco12 mm
Drillia oliverai R.N. Kilburn& P. Stahlschmidt, 2012 Philippines, Mactan Island32 mm
Drillia omanensis J.C. Melvill& R. Standen, 1901 Gulf of Oman
Plagiostropha opalus (L.A. Reeve, 1845) Philippines, Mactan Island13,8 mm
Clathrodrillia orellana W.H. Dall, 1927 USA, Georgia
Splendrillia otagoensis A.W.B. Powell, 1942 New Zealand, Otago9,5 mm
Drillia pachycheila (FOSSIL) J. Gardner, 1937 † Florida, Alum Bluff formation11 mm
Fenimorea pagodula (W.H. Dall, 1889) Bahamas10 mm
Fusiturricula pagodula (FOSSIL) R.F. Rutsch, 1934 † Venezuela
Calliclava pallida (G.B. I Sowerby, 1834) Panama, Venado Island24 mm