270 THE POLAR WORLD. 



as the Tmpinus nootJceanus and the Rhododendron kamtschctdalicum, decorate 

 these dismal regions with their brilliant color. The lively green of the mead- 

 ows reminds one of the valley of Urseren, so well known to all Alpine tourists. 



The mosses and lichens begin already at Unalaska to assume that predomi- 

 nance in the Flora which characterizes the frigid zone. 



A few degrees to the north of the Aleutian chain, which extends in a long 



