Sigatica abducta (FOSSIL) (G.P. Deshayes, 1864 †)
Eunaticina abyssalis L.R.L. Simone, 2014
Euspira abyssicola (E.A. Smith, 1896)
Tahunacca acerva (FOSSIL) (C.R. Laws, 1933 †)
Euspira achatensis (FOSSIL) (C.A. Récluz in Koninck,1838 †)
Natica acinonyx I. Marche-Marchad, 1957
Natica acuticallosa (FOSSIL) McNeil, 1984 †
Tectonatica adamsiana (R.W. Dunker, 1861)
Natica adansoni H.M.D. de Blainville,1825
Natica adducta (FOSSIL) B. Phillips, 1829 †
Natica adducta globata (FOSSIL) W.H. Hudleston, 1892 †
Natica adorfensis (FOSSIL) Holzapfel, 1882 †
Cryptonatica affinis (J.F. Gmelin, 1791)
Eunaticina africana F. Fernandes & L.P. Burnay,1984
Sinum africanum (FOSSIL) R.B. Newton, 1922 †
Euspira agujana (W.H. Dall, 1908)
Natica agulhasensis K.H.J. Thiele, 1925
Natica alapapilionis (FOSSIL) J.H. Chemnitz, 1781 †
Naticarius alapapilionis (P.F. Röding, 1798)
Naticarius alapapilionis plicifera R.A. Philippi, 1850
Natica alazana (FOSSIL) Cooke, 1928 †
Tectonatica albertii (FOSSIL) E. Robba, Pedriali& E. Quaggiotto, 2016 †
Natica albifasciata J.Y. Liu, 1977
Natica albospira E.A. Smith, 1895
Eunaticina albosutura J.C. Verco, 1909
Polinices albumen (C. Linnaeus, 1758)
Polinices albus (FOSSIL) Monfort, 1810 †
Friginatica aldingensis (FOSSIL) (R. Tate, 1893 †)
Cryptonatica aleutica (W.H. Dall, 1919)
Carinacca allani (FOSSIL) (J. Marwick, 1924 †)
Natica alticallosa (FOSSIL) W.H. Dall, 1892 †
Polinices alveatus (F.H. Troschel, 1852)
Natica amamiensis J.T. Kuroda, 1928
Falsilunatia ambigua (H.H. Suter, 1913)
Gyrodes americanus (FOSSIL) (B. Wade, 1926 †)