22 



ANTHROPOID APES. 



callosities, since the animal sometimes doubles up 

 the toes and runs upon the back of them. The nails 

 of the hands and feet are black, like the whole of 

 their skin-covering, distinctly grooved, very much 

 arched, and generally somewhat wider at the base 

 than in front. 



Fig. 3.— The young male gorilla, from the specimen in the Berlin Aquarium of 



1876-77. 



On the sole of the foot we find the region of the 

 heel, the ball of the great toe, in this case resem- 

 bling the ball of a thumb, the roots and tips of the 

 toes, together with pads consisting of muscles, ten- 



