THE MONKEYS 



193 



abandon of a human smoker. Many attempts have been 

 made to teach them to speak, but all such efforts have 

 failed. 



None of these animals stand erect. In moving among 

 the branches of trees they support themselves in an up- 

 right position by holding on with their hands ; but when 



Fig. 187. — The Orang-outang. 



on the ground, they " hitch " themselves along by pressing 

 the knuckles upon the earth, or they crawl upon all four 

 feet. 



There is a wide mental gap between the highest form of 

 monkey and the lowest type of man, represented by the 

 Australian bushmen. When the skulls of monkey and 

 man are compared, there is a vast difference seen (Figs. 



HOLDER, MAMMALS — 1 3 



