CLASS MAMMALIA. 



273 



FIG. 475. 







\ 



Hy lob' a tes syn ddc'ty lus. 

 Siamang. 



We now come to the Apes Monkeys of considerable 

 size, having no external evidence of a tail, without 

 cheek-pouches, and with elongated 

 fore limbs. When standing upright, 

 an unnatural position, they rest on 

 the outer edge ot their feet, since 

 they are not able to place their soles 

 flat upon the ground. 



The Sumatra n Siamang (si'a- 

 mang) derives its specific name from 

 the adhesion of the second and third 

 toes as far as the joint that bears the 

 nail. It has a vocal organ resem- 

 bling that of the Howling Monkey. 



The Gibbons of Southern Africa and Malay Archi- 

 pelago are distinguished by the length of their arms 

 and the slenderness of their form. With a height of 



three feet, the reach 

 of the extended arms 

 is six feet, enabling it 

 to swing through the 

 air among branches 

 twenty feet apart. 



The Om////(orang') 

 is also adapted to an 

 arboreal life. It in- 



Hy lob' a tes ag'llis. Gibbon. After Hornaday. ^^^ the iglands of 



Borneo and Sumatra. In the wild state it is frugivorous 

 (fruit-feeding), not even eating eggs, though the teeth 

 are adapted to either vegetable or animal food. Matured 

 Orangs reach a height of four feet, their long arms en- 

 abling them to span seven feet. At night they rest, 

 stretched at full length, upon a bed of branches which 



FIG. 476. 



