G L I R E S. 



49 



others ; all the nails short, pointed, and slightly carved ; tail long, 

 tapering, and clothed with short silky hairs. Color above sepia-brown, 

 beneath white ; a dark line crosses the cheek beneath the eye. 



" Length of the head and body, one and nine-tenths of an inch ; 

 head, from the nose to the occiput, nine-tenths of an inch ; ear, three- 

 twentieths of an inch ; tail, two and three-tenths inches ; fore leg, from 

 the elbow, nine-twentieths of an inch ; fore foot, three-tenths of an 

 inch ; tibia, seven-tenths of an inch ; hind foot, eight-tenths of au 

 inch ; metatarsus, five-tenths of an inch. 



" A single specimen of this singular animal was obtained in Oregon, 

 but no notes were furnished by the person who obtained it. The 

 formation of its hind legs leaves but little room to doubt that its 

 habits are similar to those of the jumping mice, Meriones lahradorws 

 (Richardson), which are inhabitants of the same region. Its singu- 

 larly large head, which equals its body in bulk, its ample cheek- 

 pouches, long hind legs, and long tail, present a general form which is 

 peculiar and altogether very remarkable. On dissection, the stomach 

 was found to contain a pulpy matter, which appeared to be the re- 

 mains of a bulbous root. The liver is very large, and consists of five 

 foliaceous lobes ; we were not able to detect any gall-bladder. The 

 specimen is a female, and presents the rudiments of a fourth molar 

 tooth in each side of the lower jaw, which would eventually have re- 

 placed the front ones, already much worn." 



4. Family SCIURIDiE.— The Squirrels. 

 1. Genus SCIURUS, Linn. Syst. Nat. I, p. 86 (1766). 

 1. SciURUS FOSSOR, Peole. — The Digger Squirrel. 



Sciurus fossor, Peale, Zool. Exp. Exp. Mamm. p. 55 (1st ed. 1848). 

 Sciurns Heermanni, Leconte, Proc. Acad. Philad. VI, p. 149 (1852). 

 Sciiu-us Clarkii, H. Smith, Griff. Cuv. Ill, p. 189 (1827) ? 



Atlas, Mammalogy, Plate IX. Adult. 



S. suj-tra 6 nigro alhoque intermixtis griseus, subtas alhus, aurihus magttis 



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