Cape Graphiure. 



metatarsus ; they resemble in these points the kangaroos. 

 They bound along on their hind limbs with great rapidity, 

 and appear almost to skim, like birds, the flat plains or 

 sandy wastes where they take up their abode. In an 

 elaborate memoir by M. F. Cuvier on the Jerboas and 

 Gerbilles, he divides these animals into different genera. 

 The Jerboas {Dipus) have only three toes on the hinder 

 feet, and these, as in birds, are articulated to a single 

 elongated metatarsal bone, commonly known as the 

 canon-bone. In the Alactagas there are five toes ; of 

 these the three central are articulated to a single meta- 

 tarsal bone, while the other two have each their own 

 slender metatarsal bone. 



In Meriones and Gerhillus the toes are five, each with 



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