Mucronalia bicincta A. Adams, 1860 China, Zhejiang7 mm
Balcis biconica (FOSSIL) Gardner, 1948 † USA, Florida, Pinellas
Eulima bifascialis (A. Adams, 1864) Philippines, Balicasag Island17 mm
Eulima bifasciata D'Orbigny, 1841 Philippines, Camotes Island11,8 mm
Echineulima biformis (G.B. III Sowerby, 1897)
Ophioarachnicola biformis A. Warén, 1980
Eulima bilineata J. Alder, 1848 Spain5 mm
Eulima bipartita O.A.L. Mörch, 1860
Stilifer birtsi (H.B. Preston, 1904) Sri Lanka
Flemmingia bistriata (FOSSIL) (Münster, 1841 †) Italy, Trentino-Alto Adige, Bolzano
Eulima bivittata (H. Adams & A. Adams,1853) Singapore
Eulima bizona (C.B. Adams, 1864) Japan
Mucronalia bizonalis H.B. Preston, 1904 Réunion
Mucronalia bizonula J.C. Melvill, 1906
Parvioris blakeae A. Warén, 1981
Melanella bolivarensis (FOSSIL) Clark & J.W. Durham,1946 † Colombia, Bolivar
Curveulima bollonsi (A.W.B. Powell, 1937) New Zealand
Sabinella bonifaciae (F. Nordsieck, 1974) Italy, Capraia Island6 mm
Melanella borealis P. Bartsch, 1917
Fusceulima boscheineni (W. Engl, 1998) Canary Islands1,7 mm
Melanella boscheineni W. Engl, 2004
Hypermastus boschorum A. Warén, 1991
Melanella boscii (B.C.M. Payraudeau, 1826) Spain7 mm
Pelseneeria bountyensis (A.W.B. Powell, 1933) New Zealand
Enteroxenos bouvieri J.J. Risbec, 1953
Melanella bovicornu (H.A. Pilsbry, 1905) Philippines, Olango Island18,7 mm
Apicalia brazieri (G.F. Angas, 1877) Exmouth, West Australia
Melanella brevis (E. Réquien, 1848)
Parvioris brevis (G.B. I Sowerby, 1834)
Eulima breviuscula R.W. Dunker, 1875 East America
Eulima broadbentae (B.C. Cotton& F.C. Godfrey, 1932)
Stylifer broderipi (A. Adams, 1878)
Niso brunnea (G.B. I Sowerby, 1834) Malaysia20,7 mm
Pelseneeria brunnea (R. Tate, 1887) Malaysia20,7 mm
Melanella brunnimaculata (E.A. Kay, 1979) Hawaii