those which dwelt in Denmark during the Stone Age, people whose kitchen middens have been discovered in that country.[40] Huxley justly observes that some of the skulls drawn by Busk, and taken from the tumuli of Borrely, resemble the Neanderthal skull, especially in the abruptly retreating forehead. Some other European skulls may, within certain limits, be compared with the Neanderthal skull, as, for instance, those found at Brüx, Staengenaes, Olmo, Louth, Clichy, Bougon, Cro-Magnon, Grenelle, Furfooz, Engisheim, Cannstadt, and Toul. These all present interesting peculiarities of structure--strongly developed supra-orbital arches, a retreating forehead, a flattened crown, etc., although none of them are so remarkable in these particulars as the Neanderthal skull. It has not, however, yet been proved that this skull represents a definite racial type, and it seems more probable that it was simply an individual form. The skulls of the Australian aborigines are, as Spengel justly observes, distinguished from the Neanderthal skull, and from others of like character, by their pronounced scaphocephalism. On the other hand, they have the prominent supra-orbital arches, the retreating forehead, the skull compressed in the temporal region, the prognathous countenance, relatively shorter than that of Europeans, and in all these respects the skulls of the Australians greatly resemble those of anthropoids. If, for instance, we turn to the illustration given by de Quatrefages and Hamy of a skull procured from Camp-in-Heaven, Arnhem’s Land, North Australia, and also Dr. Schadenburg’s negro skull, the most determined sceptic must be struck by their resemblance to the anthropoid skull.[41] Similar characteristics to those which we have already mentioned as distinguishing the structure of the Australian skull, enable us to determine the anthropoid character of the skulls of many individuals belonging to the dark-skinned African races. These consist chiefly in the retreating forehead, the flatness and compression of the coronal arch, the pronounced prognathism, and the obtuse angles of the lower maxillary bones, which may be noted in so many negro skulls. On the other hand, the prominence of the supra-orbital arches is, as a rule, less marked in African races than in anthropoid species. There are specimens, however, as, for instance, the Congo skull given by de Quatrefages and Hamy,[42] which give an overwhelming impression of anthropoid characteristics. And we find the same to a surprising degree in the skulls of intelligent, warlike, and light-skinned races of Central and Western Africa, and as the Monbuttre, Haussaua, Bakale, Fan, etc. This character may be discovered in all races of men, and especially among the Papuans and some African negroes.