304 ADDENDA. 



we detect false translation and interpolation, which 

 are noted by italics. On examination of the de- 

 scriptions of these animals by Messrs. Lewis and 

 Clark, they will be found to be generically allied 

 to the Marmots. 



Genus. 

 Arctomys. 



Species. 



I. jJrcfomys brachynra. 



Jtnisonyx brachyura, Rafinesque, Amer. Mod. 

 Magaz. vol. ii. p. 45. 



Burroiving Squirrel, Lewis and Clark's Exped. 

 lip the Missouri, vol. ii. p. 173. 



Short tailed Marmot. 



Char. Essent. Colour cinereus-brown above, 

 a light brick-red beneath ; tail flat, reddish, sub- 

 distichous, one-seventh of the total length. 



Dimensions. Total length two feet five inches, 

 including the tail, the latter being two inches and 

 a half long. 



Description. The neck and legs are short; the 

 ears are likewise short, obtusely pointed, and lie 

 close to the head ; the aperture larger than will 

 generally be found among burrowing animals ; 

 the eyes are of a moderate size, the pupil black, 

 and the iris of a dark sooty-brown ; the whiskers 

 are full, long and black; the teeth, and, indeed, the 

 whole contour, resemble those of the Squirrel : 



