264 



FIRST LESSONS IN ZOOLOGY. 



fore limbs are shorter than the hind limbs. The skull is 

 small, flattened, and narrow in front ; the brain-cavity small 

 in proportion to the rest of the skull. The cerebral hemi- 

 spheres are small and flattened, the frontal lobes narrow 

 and pointed, and behind they only slightly cover the cere- 

 bellum. 

 Allied to the true lemurs is a very puzzling creature, the 



Fia. 26 1 .— Galago. From Liltken's Zoology. 



aye-aye or Chiromys, of Madagascar, whose dentition dif- 

 fers from that of all other Primates, and resembles that of 

 the Rodents ; the thumb also is not truly opposable, and 

 all the hind digits, except the great toes, have claw-like 

 nails. The Galago, of West Africa (Fig. 361), somewhat 

 recalls the Insectivora, while "in the more active and 

 flexible-bodied lemurs, the trunk-vertebrae resemble in pro- 

 portions, connections, and direction of neural spines those 

 of the agile Carnivora" (Owen). 



