312 ADDENDA. , 



the middle of November ; the rest of the year 

 he is pure white, except the black and reddish- 

 brown of the ears, which never change. A few 

 reddish spots are sometimes intermixed with the 

 white, at this season, (February 26, 1806,) on 

 their heads and the upper part of their necks and 

 shoulders ; the body of the animal is smaller and 

 longer in proportion to its height than in the rabbit. 

 When he runs he conveys his tail straight be- 

 hind, in the direction of the body ; he appears to 

 run and bound with surprising agility and ease. 

 He is extremely fleet, and never burrows or takes 

 shelter in the ground when pursued. His teeth 

 are like those of the rabbit, as is also his upper 

 lip, which is divided as high as the nose. 



Habit. His food is grass and herbs, and in 

 winter he feeds much on the bark of several aro- 

 matic herbs growing on the plains. Captain Lewis 

 measured the leaps of this animal, and found them 

 commonly from eighteen to twenty-one feet ; they 

 are generally found separate, and are never seen 

 to associate in greater numbers than two or three. 



Inhabit the plains of Columbia, on the western 

 side of the Rocky mountains, on the eastward of 

 these mountains they inhabit the plains of the 

 Missouri. (Lewis and Clark.) 



Genus. 



Canis. 



The following notice of the North American 



