84 LECTURE II. 



the organ of sensation, volition, and other 

 faculties. In proportion to the size and 

 complexity of the brain, with reference 

 to the size of the nervous system, do 

 animals appear to possess various kinds 

 and degrees of perception and intelli- 

 gence. Camper and Hunter, at the same 

 time, attended to the apparently descend- 

 ing series in the construction of the heads 

 of animals. The head of the African 

 does really in some degree, and in some 

 individuals more particularly, approximate 

 in form to that of the monkey ; in the 

 sloping direction of the forehead, the size 

 and depth of the temporal fossa, in the 

 flatness of the nose, the projection of the 

 teeth, and the diminution of the chin. 

 We also observe this approximation in 

 other parts of the African skeleton ; in the 

 length of the loins, and in that of the fore- 

 arm and leg, compared to the arm and 

 thigh ; in the flatness of the foot, and pro- 

 jection of the heel. In the head of the 

 monkey we distinguish the same things, 

 but in so aggravated a degree, that we at 



