The s

w. part of these plains resembles the great plain of the U. S. in its undulatory and treele character; but n. of the Saskatchewan and e. of Lake Winnipeg it becomes lacustrine and forest-covered. Upon the shores of the Arctic Ocean and upon its islands are great areas of tundra. A second system of elevation, much le in area and in height than the w. one, is found in the e. provinces.