104: ORDER II. 



The Cynocephalus, or Baboons, have the head 

 still more elongated and truncated ; nostrils termi- 

 nal ; limbs robust, and of equal length ; cheek 

 pouches, and callosities, the hair wanting around 

 the last mentioned; the last molar of the upper 

 jaw with five, and the lower with six tubercles; 

 tail varying in length. 



This section includes the group of Cynocephalus, 

 or Baboons, and that of Papio^ or Mandrills. 



In the second family, the Platyrhini^ or Cebidae, 

 we have the Monkeys of the New World, whose 

 dental formula is incis. f , can. ^-, mol. - = 36 ; 

 nostrils separated by a broad partition opening on 

 the sides of the nose, the genus ERIODES excepted ; 

 tail long, often prehensile, and callosities and pouches 

 always absent. 



In the first sub-tribe, distinguished by the name 

 of Cathechura, or prehensile tails, commonly called 

 Sapajous, we have the 



Mycetes, or Howlers, more distinctly marked by 

 the cavernous form of the hyoid bone, externally 

 observable, and by the under surface of the termi- 

 nal part of the tail being hairless. They have five 

 fingers on all the hands, and are noisy inactive 

 animals. After them follow the 



AteleS) or Spider Monkeys, wanting the anterior 

 thumbs, and remarkable for their elongated slender 

 form. These pass into the genus 



ERIODES, or "Woolly Monkeys, with soft hair, 

 thumbs on the forehands in a rudimental or semi- 



