FOSSIL BEARS 445 



I'leistocene times, was one of the commonest of Carnivorous 

 creatures during the very early times of tlie present era. It 

 was as huge as a Polar Bear or a Grizzly. The skull is remark- 

 able for the fact that the first tliree premolars, which are small 

 in all Bears, dropped out early in life. An immense number of 

 names have been given to what are in all probability the same 

 species as this Cave Bear of remote antiquity. 



Hyaenarc.tos is the oldest genus of true Ursidae. It goes 

 back into Middle Miocene times, and ranged over Europe and 

 North Africa. 



Arctotherium is an American genus of Pleistocene times. 

 The likeness of some of the extinct Canidae to Bears has been 

 already commented upon. 



