QUADRUMANA. 



561 



1. Those that have the tail prehensile, or capable 

 of being twisted round an object, so as to seize it, as 

 with a hand, distinguished by the name of Sapajous, 

 or Capuchin Monkeys (Cehus). 



2. Those in which the tail is not at all prehensile, 

 constituting the family of Sakis {Pithecia). 



To the former division belong 



The Howliug Monkeys 'Mycetes*), which, from a peculiar con- 

 formation (jf their throats, are gifted with voices of tremendous power 

 and volmne. Their liowling, as travellers tell us, may be heard for half 

 a league around. It is more esi)ecially at sunrise or sunset, or on the 

 approach of a storm, that they make the forest re-echo with their 

 frightful cries, and sometimes, as it would seem, they have recourse 

 to this howling to drive away their enemies. These monkeys are 

 very common in the great forests of Brazil. 



The Spider Monkeys (^teZest) have the thumbs on their fore- 





^^''^^x 



Fig. 4>t.— OltANG-OUTANG, MANDRILL, AXD SPIDKR MONKEY. 



* lULVKTiTTis, mycetcs, a helloicer. 



t areAT^s, ate'les, imperfect— in allusion to their having only rudi- 

 mentary thumbs. 



■2 B 3 



