274 APES AXD MONKEYS 



I believe that in the future it will be shown that there 

 are two types of gorilla as distinct from each other as 

 the two chimpanzees are. This second variety of gorilla 



will be found between the third and fifth parallels south 

 and east of the delta district, but west of the Congo. I 

 believe it was represented in the ape Mafuka. 



My researches among the apes have been confined 

 chiefly to the two kinds heretofore described, but I have 

 seen and studied in a superficial way the orang and the 

 gibbon. I am not prepared as yet to discuss the habits 

 of those two apes, but, as they form a part of the group of 

 anthropoids, we cannot dismiss them without honorable 

 mention. 



The orang-outang, as he is commonly called, is known to 

 zoology by the first of these terms alone. He is a native 

 of Borneo and Sumatra, and opinions differ as to whether 

 there are two species or only one. 



The general plan of the skeleton of the orang is very 

 much the same as that of the other apes. The chief points 

 of difference are that it has one bone more in the wrist 

 and one joint less in the spinal column than is found in 

 man. He has thirteen pairs of ribs, which appear to be 

 more constant in their number than in man. His arms 

 are longer, and his legs shorter, in proportion to his body 

 than the other two apes. The type of the skull is pecu- 

 liar and combines to a certain extent more human-like 

 form in one part with a more beast-like form in another. 

 The usual height of an adult male is about fifty-one inches. 



I have never had an opportunity of studying this ape in 

 a wild state and have had access to only a few of them 



