The first part of this systematic revision concerned the Palaeotaxodonta, Cryptodonta and Pteriomorphia from the Ledian of Belgium representedby forty-seven taxa, three of which were new : Nucula smithsoni, Vulsella(?) lediensis and Lyropecten (Aequipecten) walleri . This second and last part concerns the Heterodonta and Anomalodesmata of the samestrata, with descriptions or discussions of sixty-four taxa, four of which are new: Divalinga (Stchepinskya) lediana, Vepricardium asperulumledianum, Tivelina nolfi and Varicorbula gibba richardi. Ninety-five taxa had been recognised among the Bivalvia of theBruxellian II (« Sables et Grès de Bruxelles; Sables de Nil-St.-Vincent;GLIBERT, M., 1933) and one hundred thirty-two taxa in the Wemmelian(« Sables de Wemmel et Sables d'Asse »; GLIBERT, M., 1936). In theLedian fauna one hundred and eleven bivalvian taxa are identified, twentyseven of which have never been recorded from another stratum of the Belgian Eocene.The stratigraphy of the Ledian was discussed in the introduction of the first part and an alphabetical list of localities provided. This has been supplemented by a short appendix to this part providing additional localities and a complete index. I am very much indebted to Dr. Dirk NOLF and to Mr. Richard SMITH for their valuable help in providing excellent material from Balegem (Oost-Vlaanderen).