268 



BRANCH VERTEBRATA. 



FIG. 468. 



The remaining Monkeys of the New World are quite 

 different from the Old World forms. The nostrils are 



separated by a broad septum, 

 and the teeth number thirty- 

 six. The tail is often prehen- 

 sile, and the thumb, which is 

 sometimes wanting, never has 

 the freedom of movement 

 which is characteristic of the 

 first toe. 



The Pithecia satanas (pi- 

 ths' si a sa'tan as) is remark- 

 able in that its head is covered 

 by long black hair, which has 

 a distinct parting along the 

 crown. In addition to this, 

 the sides of the face and chin 

 support a large growth of long 

 hair, resembling whiskers. 

 Though having good vocal or- 

 gans, their cries are not to be compared with those of 

 the following genus. 



The Hoirl/iifj Monkey, 

 by a special hyoidean ap- 

 paratus, is given the power 

 of producing a call ex- 

 ceeded in its depth and 

 dismalness by no other 

 animal. Besides this ac- 

 complishment, it uses its 

 long tail as a fifth hand, 

 the muscles being so strong that they can easily hold 

 the pendant body, and may even remain contracted 



Pi the'ci a sa'tan as. 



FIG. 469. 



Myce'teK ursl'nus. Bear Howler (&.) 



