32 ANTHKOPOID APES. 



the third is a little longer than tlie first, and the 

 fourth is again shorter. A web, which reaches to 

 the middle of the first row of phalanges, stretches 

 between the bases of the four fingers. There are 

 horny callosities on the back of the hand of the 

 aged male, since the chimpanzee, like the gorilla, 

 supports himself on the backs of his closed fingers. 

 The fingers are laterally compressed, but slightly 

 arched on the back of the hand, and more decidedly 

 so on the palm. A net-work of furrows covers the 

 back of the hand, and these are more deeply im- 

 pressed on its palm. The thumb is separated from 

 the palm by a distinct furrow; and from four to 

 six furrows of varying depth cross the centre of the 

 palm. The finger-nails are short, wide, and arched, 

 very convex at their free edges. 



In the aged male the sides of the belly are com- 

 pressed, the thighs are broad and muscular, and 

 somewhat flattened both on the inner and outer 

 sides. The knees are rather prominent, the shanks 

 are somewhat laterally compressed, and the calf of 

 the leg is very slightly developed. As in the 

 gorilla, the long, wide feet have a thumb-like forma- 

 tion of the great toes, which are of considerable 

 size. They extend, when drawing anything towards 

 them, as far as the second phalanx of the second toe. 

 The four other toes are more slender and only a little 

 longer than the great toe. The heel is but slightly 

 developed, and slopes away below. The joint be- 

 tween the first phalanx of the great toe and the first 

 metatarsal bone is marked by an angular projection 

 on the inner edge of the foot. The back of the foot 



