78 



SKETCH OF THE HISTORY OP MAMMALIA. 



suing their course, until they have crossed the river 

 Penshim, when they bend their way towards Judoma 

 and Ochot. which they usually reach about July : they 

 return to Kamtchatka in October, but sadly reduced in 

 numbers by the accidents of flood and field. According 

 to Dr. Henderson the Economist mouse of Iceland dis- 



\ 



46. — Teeth of Economist Mouse. 



plays great sagacity in conveying home and stocking its 

 provisions; and he corroborates the account of MM. 

 Olafsen and Povelsen respecting their mode of conveying 

 them across such streams as they may meet with in their 

 foraging expeditions. " The party, which consists of 



