We have before mentioned the extensive tracts existing in North America, which, from their desolate appearance, are appropriately called "Barrens." Far as the eye can reach the whole ground is seen strewn with boulders of rock and fallen trees, scattered round in the wildest confusion. Here and there charred stumps rise from the green-sward; in some spots clumps of spruce are seen, against which the white stems of the graceful birch stand out in bold relief; while the bank of some stream, or the margin of a lake, is marked by fringing thickets of alder. In many parts are moist, swampy bogs, into which the sportsman sinks ankle-deep at every step. The ground, however, is everywhere thickly carpeted by a luxuriant growth of a species of lichen. It possesses wonderfully nutritive qualities; so much so, that large quantities of alcohol have lately been extracted from it, as well as from other lichens growing in sub-arctic regions. It is the chief food of the cariboo, which animal frequents these desolate-looking "barrens." Visiting one of these "barrens," we may perchance fall in with several of the noble-looking animals known in Europe and Asia as the reindeer, though we must look sharp to recognise them; for so similar are they in colour to the rocks and general features of the ground, that only the keen eye of the Indian can easily detect them, especially when they are lying down. Should we approach them on the weather-side, or should the slightest noise be made, they will quickly detect us. Up they spring, and after a brief stare, make off in graceful bounds at a rapid rate. Now, having got beyond danger, they drop into a long swinging trot, and proceed in single file across the "barren," till they enter the line of forest in the far distance. The cariboo of North America is a strongly-built, thickset animal, compared to the more graceful of his relatives. He carries on his head a pair of magnificent antlers, varying greatly in different specimens-- some palmating towards the upper ends, others with branches springing from the palmated portions. In most instances there is but one developed brow antler, the other being a solitary curved prong. The back of the cariboo is covered with brownish hair, the tips of which are of a rich dun grey, whiter on the neck than elsewhere. The nose, ears, and outer surface of the legs and shoulders are of a brown hue. The neck and throat are covered with long, dullish white hair, and there is a faint whitish patch on the side of the shoulders. The rump and tail are snowy-white, while a band of white runs round all the legs, joining the hoofs.