Nerita ascensionis chlorostoma J.B.P.A. Lamarck, 1810 Ascension Island
Nerita ascensionis deturpensis G.J. Vermeij, 1970 Ascension Island32,8 mm
Nerita ascensionis trinidadensis G.J. Vermeij, 1970 Brazil, Trinidad22 mm
Nerita asperata (FOSSIL) F. Dujardin, 1837 † France, Aquitaine10 mm
Clithon aspersus (G.B. Sowerby, 1849) Philippines13 mm
Neripteron asperulatum (C.A. Récluz, 1842) Indonesia, Bali13,94 mm
Theodoxus astrachanicus Y.I. Starobogatov, 1994 Russia, Astrakhan
Nerita aterrima J.F. Gmelin, 1791 Mauritius26 mm
Nerita atra J.F. Gmelin, 1791 West Africa
Nerita atramentosa L.A. Reeve, 1855 New Zealand. Whangaparaoa28 mm
Theodoxus atticus (FOSSIL) Kühn, 1963 †
Neripteron auriculata (J.B.P.A. Lamarck, 1816) South Africa, Natal20 mm
Theodoxus baconi L.A. Reeve, 1856 Australia, Fremantle
Theodoxus baeticus J.B.P.A. Lamarck, 1822 Spain9 mm
Nereina bahiensis (C.A. Récluz, 1850) Papua New Guinea12 mm
Velates balkanicus (FOSSIL) Bontscheff, 1896 †
Nerita balteata L.A. Reeve, 1855 Philippines, Samar Island32 mm
Theodoxus banaticus (FOSSIL) E. Jekelius, 1944 †
Bajanerita banosensis (FOSSIL) R.L. Squires & Saul,2003 †
Theodoxus barakovici (FOSSIL) (Š. Brusina, 1902 †)
Clithon barbei (FOSSIL) Symonds & J.M. Pacaud,2010 † France, Marne3,2 mm
Amphinerita bartonensis (FOSSIL) Symonds, 2002 †
Nerita basteroti (FOSSIL) C.A. Récluz, 1850 † France, Aquitaine27 mm
Lissochilus bathonicus (FOSSIL) Cox & Arkell † UK, England, Gloucestershire
Nerita baylei (FOSSIL) Vasseur, 1881 † France, Brittany13 mm
Theodoxus becenensis (FOSSIL) (Cobalcescu, 1883 †)
Cryptonerita benoisti (FOSSIL) A.E.M. Cossmann, 1899 †
Puperita bensoni (C.A. Récluz, 1850) Cook Islands9 mm
Theodoxus bessarabicus (FOSSIL) (Sinzov, 1896 †)
Neritina bicanaliculata C.A. Récluz, 1843 Fiji Islands15 mm
Lissochilus bicinctus (FOSSIL) (Phillips) † UK, England, Gloucestershire
Clithon bicolor (C.A. Récluz, 1843) Papua New Guinea
Nerita birmanica F.H. Troschel, 1878 Indo-Pacific
Nerita bisecta L.A. Reeve, 1855 Mauritius
Vittoclithon boettgeri (FOSSIL) (Rzehak, 1893 †)