408 MAMMALIA. 



and a tubercle instead of a thumb ; the hind feet with five long 

 toes, all furnished with long crooked nails ; tail long, frequent- 

 ly very villose ; two pectoral teats and six ventral. 



* Tail distichous. 



Sciurus vulgaris. — The Common Sqcirrel. — Plate XV. 

 fig, 11. — Described, vol. II. p. SOI. 



Sciurus Clarkii — Clark's Squirrel. — Plate XVI*. fig. 3. 

 — Fur silvery-gray above ; shoulders, flanks, and belly, white, 

 with an ochry tint ; tail flat, terminating in a point. Inhabits 

 North America. 



** Tail round, distichous only at the extremity. 



Sciurus cestuans. — The Guerlinguet Squirrel. — Plate 

 XVII**. fig. 1.— Fur olive gray, mixed with red above, pale red 

 underneath ; tail round, longer than the body. 



*** Having cheek pouches, tail distichous. 



Sciurus striatus. — The Striated Squirrei-— Plate XVII**. 

 fig. 9.— Fur light brown above, with five longitudinal brown 

 stripes, and two white ones ; belly cream-coloured white ; tail 

 grayish-black above, chestnut, margined with black, beneath. 

 Inhabits Southern Asia. 



Gemis 21. — Pteromys. — Cuvier. 



Generic Character.— Incisory teeth |, no canines, grinders f^^; 

 total 22. Head round ; ears short and rounded •, eyes large ; 

 fore feet with four elongated toes, furnished with sharp nails, 

 and a rudimentary thumb, having an obtuse nail ; hind feet with 

 five long toes, much divided, and adapted for seizing ; tail long, 

 villose ; skin of the sides extended from the anterior to the pos- 

 terior extremities, forming a kind of parachute. 



• With the tail round, and hairs not distichous. 



Pteromys petaurista. — The Sailing Petaurista. — Plate 

 XVI*. %• 6. — Fur chestnut colour, the hairs being tipped 

 with white on the shoulders ; whitish-gray underneath ; thighs 

 red; feet brown; tail blackish, and cylindrical. Inhabits India 

 and the Islands. 



