s k .;,, 



251.— Mitchell's Jerboa. 



250.— Skull and Teeth of Burton's Gerbille. 



24!).— Burton's Gerbille. 



0* 



i'/i 





252. — Common Mouse. 



257. — Long-tailed Field Mouse. 



253. — Common Mouse. 



255. — Barbary Mouse. 



254. — Teeth of Common Mouse. 



61 



