THE ROCKY-MOUNTAIN FLYING SQUIRREL. 



15 



locity that the eye can scarcely follow them ; and they 

 skim from one tree to another, or precipitate themselves 

 to the ground, with singular agility. In their habits they 

 are nocturnal. 



4.— Teeth of Sciurus. 



These elegant animals are respectively natives of the 

 northern regions of Europe, the north of Asia, the north 

 of America, and the glowing islands of the Indian Ar- 

 chipelago. The present species is one of the American 

 flying squirrels, and was discovered by Mr. Drummond 

 on the Rocky Mountains, where it lives in dense pine- 



