82 
mammal save one—as different a creature from man as can 
well be imagined—namely, the long extinct Anoplotherium. 
The teeth of the Gorilla, on the contrary, exhibit a break, or 
interval, termed the diastema, in both jaws: in front of the 
eye-tooth, or between it and the outer incisor, in the upper 
Lynocephalus. 
LY 
id 
tro mys. . 
Che 
Fia, 18.—Lateral views, of the same length, of the upper jaws of various 
Primates. %, incisors; ¢, canines; pm, premolars; m,molars. A line is drawn 
through the first molar of Man, Gorilla, Cynocephalus, and Cebus, and the 
grinding surface of the second molar is shown in each, its anterior and internal 
angle being just above the m of m?. 
