294 THE INTERMEDIATE PRIMATES 



in captivity and reared thus are more difficult to approach and much less 

 teachable than most of the other apes. They are as vindictive, treacherous 

 and unlikeable because of their disagreeable dispositions as they are repel- 

 lent to look at because of their more or less grotesque appearance. In teach- 

 ability they show none of that quick adjustment which is observed in most 

 of the other monkeys. This fact, combined with their general tendency 

 toward savage reactions, has earned for them the reijutation of being the 

 lowest of the old-world monkeys. 



Their manual dexterity is limited to a marked degree, due probably to 

 the fact that the forelimbs are used in locomotion more than in any other 

 function. It is probable that their vision is less endowed with stereoscopic, 

 binocular adjustments than is true of the apes who carry the body m such a 

 manner that the head is for the most part in an upright position. The baboons 

 seldom assume the erect position even when supporting the body with the 

 forelimbs upon some adjacent object. They do, however, sit upon their 

 haunches in a somewhat crouched position but not nearly so freely as many 

 of the other genera of Lasiopygidae. 



Geographical Distribution 



The genus Papio is confined almost exclusively to northern Africa and 

 Arabia. The species investigated in this study is Papio cynocephalus, also 

 spoken of as Cynocephalus babuin. The yellow baboon's habitat is Mediter- 

 ranean Africa, Nubia, central and eastern Africa. 



Measurements and Indices of Papio Cynocephalus 



Individuals of this species vary considerably in size and some of the 

 older males are as large as members belonging to the dark-colored baboons. 

 In general, the body length is about 1500 or 1600 mm. The tail is from 700 

 to 730 mm. long. 



