Iconography of the Ypresian Foraminifera of the Belgian basin and description of new benthic species

In 1980 W. Willems took the degree of doctor in science with his thesis: Foraminifera of the Ieper Formation (Early Eocene) in the southern North Sea basin (biostratigraphy, paleoecology and systematics). He intended to publish the systematic part of the thesis in English. When W. Willems left us, this new version was brought to an abrupt termination. The comments on many species had the systematic part of Willems' thesis, and of the descriptions and comments for five new species described by Willems, will be very much appreciated.