172 UNGKA APE. 



extremities of the bones of the animal were car- 

 tilaginous. 



The Angola orang (Simla troglodytes, Linn.) 

 has been considered the most perfect of animals, 

 much more so than the Indian orang, {Slmia 

 satyrus,) which has been called the orang-utan, 

 although both are very inferior to man in corporeal 

 powers and intelligence. When the Indian orang 

 is compelled to take flight from pressing danger, 

 he immediately falls down upon all fours, show- 

 ing clearly that this was the original position of 

 the animal.* 



This assertion is correct according to my own 

 observation, as far as regards the orang-utan, 

 and many of the Gibbons, who maintain the erect 

 posture only for a short period ; but I found the 

 Ungka ape of Sumatra, (Simia syjidactyla,) 

 although, similar to the orang-utan, he would oc- 

 casionally aid himself by the knuckles when walk- 

 ing, yet would maintain a more erect posture 

 than I have ever observed in the latter animal, 

 besides his general form of body and countenance 

 assimilating more to the human being than the 

 orang. I have seen the Ungka, when pursued, 

 continue to maintain the erect position for some 

 time, until through fatigue, or more probably 

 from terror, he would fall to the ground, be- 

 * Lyell's Principles of Geology, vol. ii. p. 15. 



