Tapes benoisti (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1910 †
Raina bensoni (FOSSIL) (J. Marwick, 1927 †)
Pitar bermudezi O. Macsotay & B. Campos,2001
Venerella bernayi (FOSSIL) A.E.M. Cossmann, 1886 †
Placamen berrii (W. Wood, 1828)
Pitar berryi A.M. Keen, 1971
Lioconcha berthaulti K.L. Lamprell & J.M. Healy,2002
Cyclinella beteyensis (FOSSIL) A.A. Olsson, 1922 †
Callista beyrichi (FOSSIL) (C.G. Semper, 1861 †)
Chione biali (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1910 †
Tivela bicolor J.E. Gray, 1838
Petricola bicolor G.B. II Sowerby, 1854
Dosinia bilunulata (J.E. Gray, 1838)
Aphrodora birtsi (H.B. Preston, 1905)
Dosinia biscocta (L.A. Reeve, 1850)
Mercenaria blakei (FOSSIL) Ward, 1992 †
Globivenus blandiana (FOSSIL) (R.J.L. Guppy, 1873 †)
Dosinia boettgeri (FOSSIL) Martin, 1879 †
Chione bolivarensis (FOSSIL) N.E. Weisbord, 1929 †
Transennella bolivarensis (FOSSIL) Clark & J.W. Durham,1946 †
Turia bortonensis (FOSSIL) J. Marwick, 1927 †
Petricola botula A.A. Olsson, 1961
Lamelliconcha boucaryensis (FOSSIL) A.A. Olsson, 1922 †
Calva bowersiana (FOSSIL) W.P. Popenoe 1837 †
Anomalocardia brasiliana (J.F. Gmelin, 1791)
Ezocallista brevisiphonata (P.P. Carpenter, 1864)
Hysteroconcha brevispinosa (G.B. II Sowerby, 1851)
Pelecyora brocchii (FOSSIL) (G.P. Deshayes, 1836 †)
Pseudaphrodina brogniartina (FOSSIL) (Leymerie 1842) †
Flaventia brongniarti (FOSSIL) (Leymerie, 1842 †)
Protapes brownianus (H.B. Preston, 1906)
Sunetta bruggeni E. Fischer-Piette, 1974
Venerupis bruguieri (S.C.T. Hanley, 1845)
Pitar bucculentus (A. Römer, 1867)
Chione buchivacoana (FOSSIL) F. Hodson, 1927 †