JERBOA.—LABRADOR MOUSE. 211 
In confinement they are very susceptible of 
cold, and love to bask in the sun; and the 
moment they are put into the shade they 
cling close to each other. 
The Labrador Jumping Mouse, varying, 
more or less, with climate and situation, is a 
very common animal in all the northern parts 
of North America. Its habits have been but 
little observed. 
The colour of the Siberian Jerboa is a pale 
yellowish from above, and white beneath. 
That of the Labrador Jumping Mouse is a 
dark liver brown above, and white beneath ; 
but with sides of a brownish yellow, slightly 
sprinkled with black hairs. The Jerboas eat 
a variety of vegetable food, but are particu- 
larly fond of tulip-roots. 
