MAN AND APES. 103 



styloid) is, however, sometimes developed more 

 in accordance with man in one of the Ba- 

 boons than in any other Primate ; while of 

 the latisternal apes it is not the Gorilla, but 

 the Orang, which in this matter is the most 

 human. 



The Gibbons are more human than the 

 Orang, Chimpanzee, or Gorilla as to the 

 preponderance of the brain-case of the skull 

 over the bony face. But the smaller Ame- 

 rican monkeys exceed the Gibbons in this 

 respect, while the Squirrel Monkey exceeds 

 even man himself. 



A striking feature in the human skull is the 

 prominence of the inferior margin of the 

 lower jaw in front ; i.e., the presence of a 

 " chin." The feature is quite wanting in the 

 Gorilla, as also in the Orang and Chimpanzee. 

 A more or less developed " chin," however, 

 exists in the Siamang, although no other 

 species of Gibbons, and indeed no other ape or 

 Lemuroid, shows us a similar condition. 



Another marked character of man's skull is 



