306 



ZOOLOGY. 



Fia. 331.— Skeleton of Siamang Ape, a gibboQ. 



fours, the body being horizontal or prone; they have thirty- 

 two teeth, as in man, though the canines are hirge and 

 sharp; tlio thiinib is well-developed, and they are truly 

 quadrumanousj the skull has a comparatively large facial 



