MAMMALIA 



79 



premolars and twelve molars, a Marmoset has twelve premolars 

 and eight molars, agreeing in the former particular with the New 

 World monkeys proper. 



Order 2. LEMURS (Lemuroidea) 



This order includes a somewhat 

 heterogeneous collection of tropical 

 climbing mammals, of which the large 

 majority are limited to Madagascar, 

 while a smaller number are found in Fi g . 4 8.-skuii of Black indm Lemur 



/-< 1 A * _J * * 1 "\ H 7" f' Temporal fossa; o, orbit. In this case 



OOUth-eaSt Asia and in tropical West the orbit is opn behind and thus communi- 

 . r . <T~>i i 11 i cates with the temporal fossa. 



Africa. I hey have usually been in- 

 cluded in the Primates, but on insufficient grounds, the chief 

 common peculiarity being the possession of opposable thumb 



Fig. 49. Ring-tailed Lemur (Lemur cat to) 



