The Mammals and Man 



the two types of structures on different digits. The face is fox-like, 

 and lacks the human expression that is seen in the monkeys. 

 The brain shows considerable variation, being in some species 



FIG. 125. Ring-tailed Lemur. 



FIG. 126. The Slow Lemur or Loris. 



far more primitive, in others rather more highly developed, than 

 in the lower monkeys. 



The history of the group has been very completely made out 

 from fossils, and it is possible to work back to forms which, apart 



FIG. 127. The Tarsier (Lemur). 



from their known subsequent evolution, could not be definitely 

 separated from the ancestors of other mammal groups. The 

 Lemurs are illustrated in Figs. 125 to 127. 



The monkeys, to which we now turn, are divided into two 



141 



