Batheulima abbreviata (J.G. Jeffreys, 1884)
Melanella abida W.H. Dall, 1927
Oceanida abrejosensis (P. Bartsch, 1917)
Melanella abreojosensis P. Bartsch, 1917
Curveulima abrupta C.F. Laseron, 1955
Haliella abyssicola P. Bartsch, 1917
Hemiliostraca acanthyllis (R.B. Watson, 1883)
Eulima acerrima R.B. Watson, 1883
Eulima acicula (FOSSIL) C.L.F. von Sandberger,1863 †
Melanella acicula (A.A. Gould, 1849)
Eulima acicularis A. Adams, 1861
Melanella aciculata (W.H. Pease, 1861)
Melanella aciculata kuronamako (T. Habe, 1952)
Eulima aclis A. Adams, 1851
Melanella acrifa (P. Bartsch, 1915)
Melanella acuformis (G. Nevill & H. Nevill,1875)
Niso acuta (FOSSIL) A. von Koenen, 1891 †
Flemmingia acutecarinata (FOSSIL) Klipstein, 1843 †
Eulima acutissima (G.B. II Sowerby, 1866)
Hypermastus acutus (G.B. II Sowerby, 1834)
Melanella adamantina (L. de Folin, 1867)
Eulima adamsi G.B. II Sowerby, 1878
Eulima admantina L. de Folin, 1867
Niso aeglees K.J. Bush, 1885
Melanella aequatorialis (K.H.J. Thiele, 1925)
Melanella aethiopica (K.H.J. Thiele, 1925)
Melanella aethria (J.C. Melvill, 1918)
Eulima agulhasensis K.H.J. Thiele, 1925
Stilifer akahitode T. Habe & O. Masuda, 1990
Eulitoma akauni (T. Habe, 1952)
Eulima alaskensis (P. Bartsch, 1917)
Vitreolina alayoi (J. Espinosa, J.A. Ortea& J. Magaña, 2001)
Eulima alba (T.A. de M. Monterosato,1875)
Melanella alba (E.M. Da Costa, 1778)
Eulima albanyana W.H. Turton, 1932