Agapilia pachii (FOSSIL) (M. Hörnes, 1848 †)
Neritina pachyderma (FOSSIL) C.L.F. von Sandberger,1875 †
Septaria pala Unknown Author
Nerita palaeomorpha (FOSSIL) C. Gemmellaro, 1889 †
Theodoxus pallasi W.A. Lindholm, 1924
Theodoxus pallidus R.W. Dunker, 1861
Neripteron panayanum (C.A. Récluz, 1843)
Theodoxus pappi (FOSSIL) Sauerzopf, 1952 †
Theodoxus paradisii (FOSSIL) (Magrograssi, 1928 †)
Clithon parvulum (E.J. Le Guillou, 1841)
Pictoneritina passyanus (FOSSIL) (G.P. Deshayes, 1864 †)
Smaragdia patburkeae Eichhorst, 2016
Theodoxus patrae (FOSSIL) D. Esu & O. Girotti,2015 †
Neritina patricknuttalli (FOSSIL) Wesselingh, 2003 †
Nerita patula C.A. Récluz, 1841
Theliostyla paucigranosa (FOSSIL) G.J. Vermeij, M.A. Frey& B.M. Landau, 2009 †
Smaragdia paulucciana (J. Gassies, 1870)
Theodoxus pavlovici (FOSSIL) Miloševic, 1983 †
Nerita pecosensis (FOSSIL) Stanton, 1947 †
Clithon peguensis G.F. Angas, 1877
Theodoxus peloponensis (C.A. Récluz, 1841)
Nerita peloronta C. Linnaeus, 1758
Vittina pennata (I. von Born, 1778)
Theodoxus percarinatus (FOSSIL) (P. Oppenheim, 1919 †)
Cryptonerita peris (FOSSIL) Pan, 1977 †
Nerita perlucida (FOSSIL) A.E.M. Cossmann & G. Pissarro †,
Vitta perottetiana (C.A. Récluz, 1841)
Velates perserva (FOSSIL) (J.F. Gmelin, 1791 † †)
Velates perversus (FOSSIL) (J.F. Gmelin, 1791 †)
Theodoxus petasatus (FOSSIL) (Seninski, 1905 †)
Neritina petiti C.A. Récluz, 1841
Nerita phasiana C.A. Récluz, 1842
Theodoxus philippianus (FOSSIL) É.A.A. Locard, 1883 †
Nerita picea C.A. Récluz, 1841
Neritina picta (FOSSIL) Ferussac, 1825 †