4/0 THE SIBEKIAN JERBOA. 



and rolling themselves up, they lie torpid nearly all 

 that gloomy season. Sometimes they experience a 

 short revival in a warm sunny day ; when they take 

 a little food, and then relapse into their former 

 state. 



They make their nest of grass, moss, and dried 

 leaves ; this is six inches in diameter, and open only 

 from above. — Their number of young, is generally 

 three or four. 



THE JERBOA TRIBE. 



The Jerboas seem, in many respects both of con-r 

 formation and habit, much allied to the Kanguroos; 

 but an adherence to artificial system will not allow 

 them to be arranged together. They use their long 

 hind legs in leaping, very seldom going on all-fours; 

 and with their fore-legs, they both carry the food 

 to their mouth, and make their holes in the ground. 

 They are inliabitants principally of the warmer 

 climates. 



They have two front teeth above, and two be- 

 low. The fore-legs are short, and the hind-ones very 

 long ; and they have clavicles, or collar bones. 



THE SIBERIAN JERBOA *. 



This species is found in different parts of the 

 Eastern deserts of Siberia : it also occurs in Bar- 



* Synonyms. — Dipus Jacalus. Linn. Gmel. — Mus JacHlus.— 

 Linn. Si/st. Nat. ed, xii. — Egyptian Jerboa. Pennant. — Jerboa. Bruce. 

 — Jerbo. Sonnini. — Cerboa, or Daman Israel. ShavSs Travels. — Ger- 



boise et Alagtaga. Bufon. — Erdhaasc. Omdins Travels. Sha-Js 



Cen.ZooL vl. 168.— JBtr.'. 2uad. 56-t. 



