300 Dr» A* Hall on the Mammals and Birds 



terally; molars tubercular ; fore feet 4-dactyle, witTi a rudimen- 

 tary thumb in shape of a tubercle ; hind feet 5-dactyle ; body and 

 tail long ; 2 pectoral and 6 ventral mammae. 



S, striatus. Ground squirrel : Chip-monk. 



JS. Lysteri of Ray ! 



S. Carolinensis of Brisson ! 



Tamias striatus, Baird ! 



v.s.p. Length of head and body 6 inches ; of tail 4 inches. 

 Incisors deep, brown and furrowed ; lower ones twice as long as 

 the upper ; molars equal in size, surrounded by a thin plate of 

 enamel, acquiring a black crust. General colour of the head and 

 upper part of the body reddish brown, the hairs grey ; within eye- 

 lids white with a black streak at each angle ; on the cheek a 

 brown line, gradually increasing in breadth, reaches to the ears, 

 brown without, grey within ; on the back 5 longitudinal black 

 bands bordered posteriorly with red, all terminating on the rump. 

 A white line separates the two lateral ones ; abdomen and inside 

 of the thighs pale ; tail red at the base with an edging of 

 black. 



S. Hudsonius. Red squirrel. 



S. vulgaris, var. E. of Erxlebein. 



S. vulgaris of Linnaeus, 



v.s.p. Length of head and body 8 inches and 6 lines ; of 

 tail Q\ inches. Incisors strong, much compressed, convex ante- 

 riorly, deep orange coloured, nearly as long as the lower ones 

 ridges of enamel on the molars less elevated than in the former 

 species ; distance between the orbits 7 lines ; eyes large, promi- 

 nent ; frontal bone flat ; nose obtuse ; whiskers black, longer than 

 the head ; ears subrotund, pencilled at the tips. On each side of 

 nose a light brown spot, divided by a narrow black stripe. Be- 

 tween the ears a beautiful bright glossy chesnut commences, and 

 continues down the back, becoming lighter on the sides ; eyelids 

 white ; throat, chest, and inside of legs, dirty white. In summer 

 when the pelage is short, a black line, well defined, separates the 

 abdominal white from the lateral chesnut. This stripe is lost in 

 winter when the fur is long and thick. Fore feet 4-dactyle with 

 the rudiment of a thumb covered by an obtuse thin nail closely 

 applied ; 3rd toe longest, 2nd next in length, 1st and 4th shortest 

 and arise more posteriorly ; claws compressed, slightly curved, 

 chesnut coloured ; scrotum in spring large and pendulous ; tail 



