“Under whatever aspect we view this cranium, whether we regard its vertical depression, the enormous thickness of its supraciliary ridges, its sloped occiput, or its long and straight squamosal suture, we meet with ape-like characters, stamping it as the most pithecoid of human crania yet discovered.”
“The Australian skull is remarkable for its narrowness and for the thickness of its walls, especially in the region of the supraciliary ridge, which is frequently, though not by any means invariably, solid throughout, the frontal sinuses remaining undeveloped.”
“But this great circumference arises largely from the vast development of the supraciliary ridges, though the perimeter of the brain case itself is not small.”
“Australian skulls do not present this flattening, and the supraciliary ridge of the Engis skull is quite unlike that of the typical Australians.”
“Man, the surface of the skull is comparatively smooth, and the supraciliary ridges or brow prominences usually project but little — while, in the Gorilla, vast crests are developed upon the skull, and the brow ridges overhang, the cavernous orbits, like great penthouses.”
“In order to solve these doubts, and to decide the question whether the great supraciliary projections did, or did not, arise from the development of the frontal sinuses, I requested”
“A small additional amount of flattening and lengthening, with a corresponding increase of the supraciliary ridge, would convert the Australian brain case into a form identical with that of the aberrant fossil.”
“The occiput is quite as retreating, the supraciliary ridges are nearly as prominent, and the skull is as low.”
“The large supraciliary ridges give the forehead a far more retreating appearance than its internal contour would bear out.”
“(Fig. 25, A.) exhibits the wide openings of the frontal sinuses upon the inferior surface of the frontal part of the skull, into which, Dr. Fuhlrott writes, “a probe may be introduced to the depth of an inch,” and demonstrates the great extension of the thickened supraciliary ridges beyond the cerebral cavity.”
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