448 



ZOOiOGT 



erate tunnellers ; their cheek pouches enable them to carry an 

 extra sujjply of seeds and vegetables. The porcupine of our 



Fig. 405. — Geoviys tuza, the Georgia gopher. One-half nat. size. After 



\. Bailey. 



northern country' is remarkable for its modified hairs, which 

 form spines, many of which are hollow cjuills. These are for- 

 midable organs of defence. Finall)^, the hares and rabbits are 

 characterized by their great ears, short tails, and sndft flight ; 



Fig. 400. — An insectivorous bat, Synotus. After Vogt and Speeht. 



in these respects tlie hares hav(> devclo]ied further than the 

 rabbits. 



The bats (Fig, 406) are extraordinarily modified mammals 



