370 



SCIURUS DOUGLASSII.— Bach. 



Douglass' SauiKBEL. 

 PLATE XLVni.— Male and Female. Natural size. 



S. Hudsonio quarta parte major ; cauda corpore curtiore ; supra sub- 

 niger, infra flavus. 



CHAKACTERS. 



About one-fourth larger than the chickaree (S. Hudsonius) ; tail, shorter 

 than the body ; colour, dark-brown above, and bright-buff beneath. 



SYNONYMES. 



SciUHua DocGLASSii, Gray, Proceedings Zool. Society, London, 1836, p. 88, named, but 



apparently not described. 

 " " Bachman, monograph of the Genus Sciurus, Proceedings Zool. Soc, 



London, 1838. 



DESCRIPTION. 



Incisors, a little smaller than those of Sciurus Hudsonius; in the 

 upper jaw the anterior molar, which is the smallest, has a single rounded 

 eminence on the inner side ; on the outer edge of the tooth there are two 

 acute points, and there is one in front ; the next two grinders, which are 

 of equal size, have each a similar eminence on the inner side, with a 

 pair of points externally ; the posterior grinder, although larger, is not 

 unlike the anterior one. In the lower jaw the boimding ridge of enamel 

 in each tooth forms an anterior and posterior pair of points. The molars 

 increase gradually in size from the first, which is the smallest, to the pos- 

 terior one, which is the largest. 



This species, in the form of its body, is not very unlike Sciurus Hud- 

 sonius ; its ears and tail, however, are much shorter in proportion, and in 

 other respects, as well as in size, it differs widely from Hudsonius. 



Head, considerably broader ; and nose, less elongated and blunter than 

 in the latter; body, long and slender; ears, rather small, nearly rounded, 

 slightly tufted posteriorly. As usual in this genus, the third inner toe is 

 the longest, and not the second, as in the spermophiles. 



