Nassarius omuensis (FOSSIL) (H. Noda, 1980 †)
Nassarius onchodes (W.H. Dall, 1917)
Nassarius oneratus (G.P. Deshayes, 1863)
Antillophos opimus K. Fraussen & G.T. Poppe,2005
Nassarius optimus (G.B. III Sowerby, 1903)
Cyllene orientalis A. Adams, 1851
Nassarius orissaensis (H.B. Preston, 1914)
Nassarius orthezensis (FOSSIL) R. Tournouer, 1876 †
Bullia osculata (G.B. III Sowerby, 1900)
Bullia osseum (K.T. Menke, 1829)
Bullia othaeitensis (J.G. Bruguière, 1789)
Bulliopsis ovata (FOSSIL) T.A. Conrad, 1862 †
Tritia ovoidea (É.A.A. Locard, 1886)
Nassarius ovum (FOSSIL) Martin, 1879 †
Cyllene owenii J.E. Gray in E. Griffith& E. Pidgeon, 1834
Nassarius oxia (FOSSIL) Gardner, 1944 †
Antillophos oxyglyptus (W.H. Dall & C.T. Simpson,1901)
Nassarius pacaudi (FOSSIL) F. Van Dingenen, L. Ceulemans& al., 2015 †
Nassarius pachychilus (H. von Maltzan, 1884)
Phrontis pagoda (L.A. Reeve, 1844)
Tritia pallaryana Aissaoui, J. Ahuir Galindo, N. Puillandre& P. Bouchet, 2017
Ilyanassa palmbeachensis (FOSSIL) E.J. Petuch, 1994 †
Nassarius palumbis (FOSSIL) F. Van Dingenen, L. Ceulemans& al., 2015 †
Nassarius papillosus (C. Linnaeus, 1758)
Cymatophos paraguanensis (FOSSIL) (F. Hodson, 1931 †)
Nanarius parapristus (FOSSIL) (Gardner 1944 †)
Nassarius parcipictus W. Adam & J. Knudsen,1984
Nassaria pardalis (FOSSIL) Noetling, 1895 †
Dorsanum parinense (FOSSIL) A.A. Olsson, 1928 †
Cyllene parvula L. Bozzetti, 2014
Nassarius pascaleae (FOSSIL) B.M. Landau & al., 2013 †
Nassarius patnuttalli B.M. Landau, C.M. da Silva& C. Gili, 2010
Nassarius patricius (K.H.J. Thiele, 1925)
Bullia patula (FOSSIL) G.P. Deshayes, 1835 †
Nassarius paucicostatus (F.P. Marrat, 1877)