OF THE CLASS MAMMALIA. 



261 



the flank and tail to the extremity of the fingers (Fig. 200, 201). 

 The brain also is much less developed than in the preceding 



Pig. 200. Chauve-Souris Oreillard. 



groups. The dental system is still composed of incisives, 

 canine, and molar teeth. Of the class, some are frugivorous, 

 with molars resembling 

 thequadrumaua; others 

 insectivorous, and in 

 these the teeth are 

 formed as in the follow- 

 ing class. The bats are 

 the principal represen- 

 tatives of the group. 



417. The insecti- 

 vora do not differ from 

 the other onguiculated 

 mammals excepting in Fig 201 _ Oreillard (walking on the 



this, that the molar ground), 



teeth are evidently con- 

 structed for the crushing of insects, on which they live. They 

 are in fact rough, with conical 

 points (Fig. 18), which adapts 

 them for this purpose. Their 

 brain rather resembles that of 

 the cheiroptera in having no 

 convolutions, than what we find 

 in the bimana, quadrumana, 

 carnivora, and amphibia. The 

 greater number make, use of 

 burrows, and hybernate. We 

 cite, as examples of the 



Fig. 202. Shrew Moose 

 (Musaraigne). 



group, the mole (Fig. 185), the hedgehog, the desman 

 (Fig. 180), and the shrew mouse, or musaraigne (Fig. 202). 



