Wiesbaden, C. W. Kreidel 1903. 4to. [ii], 43 pp. (numbered [373]-415); 24 text figures (mostly [x-ray] photos). Original printed wrappers and original quarter linen portfolio over printed boards.

Written by the German dentist Friedrich Otto Walkhoff (1860-1934) who was a pioneer of X-ray dental diagnostics. In this radiological study he described and illustrated the lower jaws of Pleistocene Neanderthal specimens from three famous localities in Belgium, namely La Naulette, Spy, and Goyet. Here, he was the first to prove that they do not belong to modern Homo sapiens, but indeed to a different species, Homo neanderthalenis. This monograph also form a part of Selenka's Menschenaffen (Anthropomorphae) Studien über Entwickelung und Schädelbau. Small private owner's stamp in the title page margin. Several pencil underlinings; otherwise fine. In all a very good copy. Cat. BM(NH) 5, p. 2256.