54 Dr. L. J. Sanford on the Gorilla. 
a line drawn from the projecting part of the forehead to the in- 
cisor teeth of the upper jaw, and another, drawn horizontally 
backwards from the jaw to the opening into the ear), is large, 
measuring 75° or more; while in the apes, as in all brutes, the 
facial bones retreat anteriorly from the perpendicular, from the 
forehead towards the chin—giving a comparatively small angle. 
This bestial characteristic is not very prominent in the quad- 
rumana; in the gorilla, we should say that the slant of its face 
i 
H 
is such that the entire outline of the skull, viewed laterally, would — 
very nearly represent a rhomb. 
comminuting it,—the articulation of the lower jaw with the fem- 
_ poral bone not favoring so free a lateral motion, as thé grinding 
: : 
among 
selves, two certainly, the chimpanzee and kooloo-kamba, have & 
they would take rank above 
the cranium of the male gorilla, is another non-human 
e 
