THE TEETH OF MAMMALS 149 



by breeding and the consequent lack of space for 

 development. In the long-muzzled dogs, as the 

 Hounds, on the contrary, there is increase of 

 space, and additional molars are sometimes found. 

 The Hyenas are more carnivorous than the 

 dogs, so that the tubercular teeth, the molars, are 

 reduced, and the sectorial features increased 

 (Fig. 56). The premolars are stout and heavy 

 for crushing bones (Fig. 57). 



FlG. 58. — Teeth of Skunk (Mephitis mephitica) . 



The Mustellidce includes the Ferrets, Weasels, 

 Skunks (Fig. 58), Badgers (Fig. 59), etc. The 

 formula is, — 



As these animals are predaceous or blood-suck- 

 ing, their dentition is essentially carnivorous, 

 though more sharp, long, and slender than that 



