Wrightudora bermudezi (C. de la Torre& P. Bartsch, 1941) Cuba
Bermudezsiphona bermudezi (C. de la Torre& P. Bartsch, 1941) Cuba
Hendersonina bermudezi C. de la Torre& P. Bartsch, 1938 Cuba
Opisthosiphon berryi W.F. Clapp, 1919 Cuba
Christophipoma bertini (H. von Maltzan, 1888) Haiti
Tropidophora besalampiensis E. Fischer-Piette, 1945 Madagascar
Tropidophora betsiloensis E.A. Smith, 1882 Madagascar
Cyclotopsis beviae (E. Fischer-Piette, Ch.P. Blanc, F. Blanc& F. Salvat, 1993) South Madagascar13,4 mm
Bermudezia biayensis (C. de la Torre& P. Bartsch, 1941) Cuba
Chondropoma biforme L. Pfeiffer Bahamas
Rhytidothyra bilabiata (A.V.M.D. D'Orbigny,1842) Cuba20 mm
Rhytidothyra bilabiata aurantiaca C. de la Torre& P. Bartsch, 1941 Cuba12 mm
Rhytidothyra bilabiata rosacea C. de la Torre& P. Bartsch, 1941 Cuba18 mm
Rhytidothyra bilabiata rosea C. de la Torre& P. Bartsch, 1941 Cuba16 mm
Opisthosiphon bioscai C. de la Torre& J. Henderson, 1920 Cuba
Pomatias bisulcatus (FOSSIL) (von Zieten, 1832) †
Choanopoma blaini (J. Gundlach in L. Pfeiffer, 1863) Cuba9,9 mm
Weinlandipoma blandi (C.D. Weinland, 1862) Haiti
Chondropoma blauneri R.J. Shuttleworth, 1854 Puerto Rico
Gundlachtudora bombardopolensis P. Bartsch, 1946 Haiti
Annularia boqueronensis (C. de la Torre& P. Bartsch, 1941) Cuba
Annularisca borroi (M.L. Jaume, 1984) Cuba
Chondrothyrium borroi M.L. Jaume& Sánchez De Fuentes, 1943 Cuba19 mm
Tropidophora boucheti E. Fischer-Piette, Ch.P. Blanc, F. Blanc& F. Salvat, 1993 Madagascar
Ligatella bourguignati E. Neubert, 2009 Yemen, Socotra
Colobostylus bronnii (C.B. Adams, 1845) Jamaica12,4 mm
Chondropoma brownianum C.D. Weinland, 1880 Haiti
Leonia buccinulum (J.F. Bolten) Guam
Lithidion bucephalos E. Neubert, 2009 Yemen10,9 mm
Ramsdenia bufo (L. Pfeiffer, 1864) Cuba
Chondropoma cabrerai C. de la Torre& P. Bartsch, 1938 Cuba
Eutudora cabrerai (C. de la Torre& P. Bartsch, 1941) Cuba
Opisthosiphon caguanense C. de la Torre& P. Bartsch, 1941 Cuba
Tropidophora calcarea (G.B. Sowerby, 1843) Tanzania
Abbottella calliotropis G.T. Watters, 2013 Dominican Republic