The contracted temporal muscle forms a prominence above the zygoma.
The facial portion of the skull is short, and the zygoma is deep.
In front of the ear, lies the zygoma, one of the most marked and important landmarks to the touch, and in lean persons to the eye.
Length of skull about 1-5/12 inches; width at the zygoma, 1¼.
It has, moreover, no zygoma in the skull, and there is no caecum.
That part of the braincase immediately above posterior root of zygoma is more conspicuously inflated.
The lower jaw is long, and remarkably full under the zygoma, so as to give to the countenance a square appearance.
The malar bone is small, and, as in Rodents, forms the middle part of the zygoma.
Reduction of the zygoma clearly represents modification of a more generalized, complete arch.
The pulsation of the temporal artery can be felt in front of the ear, between the zygoma and the ear.