8o CHARACTERS OF VERTEBRATE ANIMALS 



and great toe, a character associated with the climbing habit. 

 The brain-case is relatively smaller than in a monkey, and the 

 orbits are not completely walled in at the back by bone (fig. 48). 

 In accordance with their nocturnal habits these animals have 



Fig. 50, — The Spectre-Tarsier [Tarsius spectrum) 



large and sometimes even enormous eyes. There are generally 

 more than one pair of mammary glands. 



The Ring-tailed Lemur {Lemur catta) of South-west Mada- 

 gascar may be taken as an average member of the order (fig. 49), 

 while the little Spectre-Tarsier (Tarsius spectrum), with a body 

 of only about 6 inches long, will serve as an example of the 

 forms with especially large eyes (fig. 50). It is an East Indian 

 and Philippine species. 



