150 UNGKA APE. 



the maintop, but seemed to liave a determination 

 to stay where he thought himself the most com- 

 fortable, and which I, at last, after much crying 

 and solicitation from him, permitted. 



He was not able to take up small objects with 

 facility, on account of the disproportion of the 

 size of the thumb to the fingers. The meta- 

 carpal bone of the thumb has the mobility of 

 a first joint. The form of both the feet and 

 hands gives a great prehensile power, fitted for 

 the woods or forests, the natural habitat of these 

 animals, where it must be almost an impossi- 

 bility to capture an adult of the species alive. 



Under the throat is a large black pouch, a con- 

 tinuation of the common integument, very thinly 

 covered with hair, and not very visible when 

 undistended. It has a corrugated appearance, 

 extending from the under part of the chin to 

 the throat, is attached as low down as the upper 

 part of the sternum, and it is also attached above 

 to the symphysis of the lower jaw. The use of this 

 pouch has been a subject of much speculation : 

 having the animal for some time with me, sleep- 

 ing in the same apartment, I might be able to 

 form some opinion on the subject. Its use is 

 certainly not well known, though it is not impro- 

 bable that it may be an appendage to the organ of 

 voice. For often when irritated, I have observed 



