2 72 FIRST LESSONS IN ZOOLOGY 



mammalian species found there. The brain is much less 

 developed in the lemurs than in any of the other monkeys. 

 The monkeys and apes may be divided into two groups, 

 the lower, platyrrhine monkeys, found in the New World, 

 and the higher, catarrhine forms, limited to the Old 

 World. The platyrrhine monkeys have wide noses in 

 which the nostrils are separated by a broad septum and 

 with the openings directed laterally. These monkeys are 

 mostly smaller and weaker than the Old World forms and 

 are always long-tailed, the tail being frequently prehen- 

 sile. They include the howling, squirrel, spider, and 

 capuchin monkeys common in the forests of tropical 

 South America. The catarrhine monkeys have the nose- 

 septum narrow and the openings of the nostrils directed 

 forwards, and the tail is wanting in numerous members of 

 the group. They include the baboons, gorillas, orang- 

 outangs, and chimpanzees. These apes have a dentition 

 approaching that of man, and in all ways are the animals 

 which most nearly resemble man in physical character. 



Interesting accounts of the lives of familiar mammals 

 are given in three books by Wm. T. Long, entitled "Ways 

 of Wood Folk," "Wilderness Wa}'s," and " Secrets of 

 the Woods. " 



