378 



BRANCH CHORDATA 



great affection for their families, the father often taking the baby 

 from the mother and carrying it, especially in dangerous places, 

 and they seek to assist one another when hurt or in trouble. 

 They seem to delight in noise, uttering loud shrieks and howls, 

 and drumming with sticks on resonant logs. This is the only 

 employment of an instrument or tool, and, in itself, shows a wide 

 difference between the chimpanzee and the lowest human savage. 



Fig. 301. Gorilla engena. (Vogt and Specht.) 



A rude platform of branches is built for the family bed, the 

 father, perhaps, sleeping curled up in a crotch of the tree be- 

 neath it. 



The Gorillas. Both in kind and number "the bones below the 

 skull are the same in the skeletons of man and the gorilla. 

 They differ only in their proportions " (Fig. 299, 4). The widest 

 differences are in the skulls. In the gorilla the high forehead 

 and intellectual faculties so characteristic of man are entirely 



