inches, and the transverse arc probably about 10¼ inches, but, owing to incompleteness of temporal bones, this could not be correctly ascertained; the horizontal circumference is 23 inches, which high figure is due to the vast development of the superciliary ridges; and the sagittal suture, notwithstanding the great length of the skull, only 4½ inches. Huxley sums up his examination of the Neanderthal skull in these words: “There can be no doubt that, as Professor Schaafhausen and Mr. Busk have stated, this skull is the most brutal of all known human skulls, resembling those of the apes, not only in the prodigious development of the superciliary prominences and the forward extension of the orbits, but still more in the depressed form of the brain-case, in the straightness of the squamosal suture, and in the complete retreat of the occiput forward and upward from the superior occipital ridges;” and he then proceeds to clearly show that the skull could not have belonged to an idiot. On the whole, the Engis skull more clearly approaches the Caucasian type, while the Neanderthal differs entirely from all known human skulls, being more nearly allied to the chimpanzee than to the human. Both these skulls belonged to individuals who lived in the early Pleistocene era, the Engis being probably the older of the two, and yet the Engis is the most like the modern European skull, which tells us plainly that in those remote times there were existing in Belgium and the surrounding districts two different races of men, one highly advanced in brain evolution and the other in a wretchedly low condition of intellectual development. The Neanderthal skull probably formed part of an individual belonging to the tail-end of a semi-human race, while the Engis skull, in all probability, belonged to an oriental immigrant belonging to a more advanced race. It must be always remembered that scientific men have long since admitted the truth of the theory that the differences in character between the brain of the highest races of men and that of the lowest, though less in degree, are of the same order as those which separate the human from the ape brain, the same rule holding good in regard to the shape of the skull.