ENVIRONMENT 



395 



animals. Their shelter in winter is a snow house (Fig. 264) 

 lined with the skins of animals, and in summer a tent made of 

 these same skins. The six months of summer are spent in 



A B 



FIG. 263. Arctic animals: A, the polar bear; B, the seal. 



hunting, fishing, sewing furs, and storing away supplies for the 

 six months of intense cold, darkness, and enforced idleness. 

 The inability of the ice-blocked land to support vegetation, 

 the long dark winter, and the inactivity which it creates, keep 



FIG. 264. Life in the arctic regions. 



