Mucronalia bicincta A. Adams, 1860
Balcis biconica (FOSSIL) Gardner, 1948 †
Eulima bifascialis (A. Adams, 1864)
Eulima bifasciata D'Orbigny, 1841
Echineulima biformis (G.B. III Sowerby, 1897)
Ophioarachnicola biformis A. Warén, 1980
Eulima bilineata J. Alder, 1848
Eulima bipartita O.A.L. Mörch, 1860
Stilifer birtsi (H.B. Preston, 1904)
Flemmingia bistriata (FOSSIL) (Münster, 1841 †)
Eulima bivittata (H. Adams & A. Adams,1853)
Eulima bizona (C.B. Adams, 1864)
Mucronalia bizonalis H.B. Preston, 1904
Mucronalia bizonula J.C. Melvill, 1906
Parvioris blakeae A. Warén, 1981
Melanella bolivarensis (FOSSIL) Clark & J.W. Durham,1946 †
Curveulima bollonsi (A.W.B. Powell, 1937)
Sabinella bonifaciae (F. Nordsieck, 1974)
Melanella borealis P. Bartsch, 1917
Fusceulima boscheineni (W. Engl, 1998)
Melanella boscheineni W. Engl, 2004
Hypermastus boschorum A. Warén, 1991
Melanella boscii (B.C.M. Payraudeau, 1826)
Pelseneeria bountyensis (A.W.B. Powell, 1933)
Enteroxenos bouvieri J.J. Risbec, 1953
Melanella bovicornu (H.A. Pilsbry, 1905)
Apicalia brazieri (G.F. Angas, 1877)
Melanella brevis (E. Réquien, 1848)
Parvioris brevis (G.B. I Sowerby, 1834)
Eulima breviuscula R.W. Dunker, 1875
Eulima broadbentae (B.C. Cotton& F.C. Godfrey, 1932)
Stylifer broderipi (A. Adams, 1878)
Niso brunnea (G.B. I Sowerby, 1834)
Pelseneeria brunnea (R. Tate, 1887)
Melanella brunnimaculata (E.A. Kay, 1979)