352 



THE INTERMEDIATE PRIMATES 



pleasures of the futile pursuit. If, perchance, threatened with capture, they 

 often resort to concerted action in which a number of members of the group 

 will take part in defending or rescuing one of the herd, which may be in difTi- 



Courlesy^ American Museum oj Natural History' 



FIGS. l6l AND 162. HAND AND FOOT OF MACACUS RHESUS. 



Left. Palmar surface of hand showing well-dcvelopcd manual characteristics, pronounced digitation, short 



but opposable thumb. 

 Right. Plantar surface of loot showing well-developed heel, narrow sole, long, narrow toes, and long 



opposable hallux. 



culties. Among themselves they are constantly on the move. Repose seems 

 totally foreign to their behavioral program. Scampering, swinging, chatter- 

 ing, screaming, they go all day long among the trees, either without design in 

 their actions, or changing some fleeting purpose so frequently that their entire 

 formula of behavior has the appearance of ceaseless, kaleidoscopic motion. 

 They are very quarrelsome, constantly fighting or teasing each other. And 

 here, as in all of their activities, the object of their anger, the victim of their 

 mirth is as quickly shifted as their lleeting attention. They feed upon spiders 



