Liège, H. Dessain, 1851. 4to (29.9 x 21.8 cm). 76 pp.; five lithographed, tinted plates with explanatory text leaves. Contemporary half calf over marbled boards. Spine with four raised bands; gilt ornamental bands and title. Marbled endpapers; marbled edges.

A rarely seen supplement, published nine years after the main work. Written by the Belgian palaeontologist Laurent Guillaume de Koninck (1809-1887), who once tried to become the successor of Louis Agassiz at Harvard. Offprint with double pagination and plate numbering. The plates show well-preserved gastropods, cephalopods, bivalves and brachiopods. "With the fauna and palaeontological subdivision of the Carboniferous limestone De Koninck occupied himself for more than fifty years. His monograph of the fossil fauna of the Belgian Carboniferous limestone... are still the basis of all European research on the faunas of the Carboniferous limestone" (Zittel). 1865 bookplate of Harvard University "the gift of Joseph Green Cogswell (Class of 1806) former librarian" mounted on the front pastedown. A stamp of the American malacologist Richard Irwin Johnson (1925-2020) in the top margin of the half-title and title. Text and plates clean, apart from a few, very small spots. Cat. BM(NH) p. 1014; Ward and Carozzi, 1296.