Wrightudora bermudezi (C. de la Torre& P. Bartsch, 1941)
Bermudezsiphona bermudezi (C. de la Torre& P. Bartsch, 1941)
Hendersonina bermudezi C. de la Torre & P. Bartsch,1938
Opisthosiphon berryi W.F. Clapp, 1919
Christophipoma bertini (H. von Maltzan, 1888)
Tropidophora besalampiensis E. Fischer-Piette, 1945
Tropidophora betsiloensis E.A. Smith, 1882
Cyclotopsis beviae (E. Fischer-Piette, Ch.P. Blanc, F. Blanc& F. Salvat, 1993)
Bermudezia biayensis (C. de la Torre& P. Bartsch, 1941)
Chondropoma biforme L. Pfeiffer
Rhytidothyra bilabiata (A.V.M.D. D'Orbigny,1842)
Rhytidothyra bilabiata aurantiaca C. de la Torre & P. Bartsch,1941
Rhytidothyra bilabiata rosacea C. de la Torre & P. Bartsch,1941
Rhytidothyra bilabiata rosea C. de la Torre & P. Bartsch,1941
Opisthosiphon bioscai C. de la Torre& J. Henderson, 1920
Pomatias bisulcatus (FOSSIL) (von Zieten, 1832) †
Choanopoma blaini (J. Gundlachin L. Pfeiffer, 1863)
Weinlandipoma blandi (C.D. Weinland, 1862)
Chondropoma blauneri R.J. Shuttleworth, 1854
Gundlachtudora bombardopolensis P. Bartsch, 1946
Annularia boqueronensis (C. de la Torre& P. Bartsch, 1941)
Annularisca borroi (M.L. Jaume, 1984)
Chondrothyrium borroi M.L. Jaume& Sánchez De Fuentes, 1943
Tropidophora boucheti E. Fischer-Piette, Ch.P. Blanc, F. Blanc& F. Salvat, 1993
Ligatella bourguignati E. Neubert, 2009
Colobostylus bronnii (C.B. Adams, 1845)
Chondropoma brownianum C.D. Weinland, 1880
Leonia buccinulum (J.F. Bolten)
Lithidion bucephalos E. Neubert, 2009
Ramsdenia bufo (L. Pfeiffer, 1864)
Chondropoma cabrerai C. de la Torre & P. Bartsch,1938
Eutudora cabrerai (C. de la Torre& P. Bartsch, 1941)
Opisthosiphon caguanense C. de la Torre & P. Bartsch,1941
Tropidophora calcarea (G.B. Sowerby, 1843)
Abbottella calliotropis G.T. Watters, 2013