QUADRUMANA. 631 



The Platyrhine Monkeys are exclusively confined to South 

 America. 



Section C. Catarhina. In this section the nostrils are ob- 

 lique, and placed close together. The thumb of the fore-limb 

 (pollex), with one exception, is present, and is always oppos- 

 able to the other digits. The Catarhine Monkeys are restricted 

 entirely to the Old World, and, with the single exception of a 

 Monkey which inhabits the rock of Gibraltar, they are exclu- 

 sively confined to Africa and Asia. It is in the Catarhine sec- 

 tion of the Quadrumana that we have the highest group of 

 the Monkeys that, namely, of the Anthropoid or Tail-less 

 Apes. 



STREPSIRHINA. 



This section of the Quadrumana, as before said, is charac- 

 terised by the possession of twisted or curved nostrils, placed 

 at the end of the snout. The incisor teeth are generally much 



modified, and are in number ^^ as a rule ; the lower 



O O -5 <2 



incisors are produced and slanting; the prsemolars are^- 



2 2 3~ .3 



or- - and the molars are tuberculate. The second disrit 



2 2' 



of the hind-limb has a claw, and both fore and hind feet have 

 five toes each, ail the thumbs being generably opposable. In 

 the true Lemurs, all the digits, except the second toe of the 

 hind-feet, are furnished with nails. 



This section is often called that of the Prosimm, and it in- 

 cludes several families, of which the Aye-Ayes, Loris, and true 

 Lemurs are the most important. In many works the Galeo- 

 pithecus is also placed in this section. 



The family of the Aye- Ayes (Cheiromyda) includes only a 

 single animal, the Cheiromys Madagascariensis. In appearance 

 the Aye- Aye is not very unlike a large. Squirrel, having a hairy 

 body and a long bushy tail. There are no canines, and the 

 molars are separated by a wide interval from the incisors. The 

 incisors are ploughshare-shaped, and grow from permanent 

 pulps, as in the Rodents. The fore-feet have five toes, armed 

 with strong claws, but the. pollex is scarcely opposable to the 

 other digits. The middle-finger is about as long as the ring- 

 finger, but only about half as thick, its last two joints being 

 hairless. The hind-feet have also five toes, of which the hallux 

 is opposable, and the second digit is furnished with a long 

 claw. As far as is yet known, the Cheiromys is entirely con- 

 fined to Madagascar. 



