VERTEBRATA. MAMMALIA. 



ORDER II. QUADRUMANA.* 



The ORANG-OTAN (Simia Satyrus), GIBBON (Cynoccphalus Mormon), 

 and SPIDER MONKEY (Ateles Frontalis). 



This order of animals has always possessed the 

 greatest interest to naturalists ; being, of all, that 

 which bears the closest similarity to the human form 

 and structure, although the separating chasm, even 

 in these respects, is still immense. The character by 



* Quatuor, four, and manus, a hand. 



