On the other hand, when a sufficient number of bears from widely separated regions are examined, the various distinguishing marks are found to be inconstant and to show a tendency—exactly how strong I cannot say—to fade into one another. The differentiation of the two species seems to be as yet scarcely completed; there are more or less imperfect connecting links, and as regards the grizzly it almost seems as if the specific characters were still unstable. In the far Northwest, in the basin of the Columbia, the “black” bear is as often brown as any other color; and I have seen the skins of two cubs, one black and one brown, which were shot when following the same dam. When these brown bears have coarser hair than usual their skins are with difficulty to be distinguished from those of certain varieties of the grizzly. Moreover, all bears vary greatly in size; and I have seen the bodies of very large black or brown bears with short foreclaws which were fully as heavy as, or perhaps heavier than, some small but full-grown grizzlies with long foreclaws. These very large bears with short claws are very reluctant to climb a tree; and are almost as clumsy about it as is a young grizzly. Among the grizzlies the fur varies much in color and texture even among bears of the same locality; it is of course richest in the deep forest, while the bears of the dry plains and mountains are of a lighter, more washed-out hue. A full-grown grizzly will usually weigh from five to seven hundred pounds; but exceptional individuals undoubtedly reach more than twelve hundredweight. The California bears are said to be much the largest. This I think is so, but I cannot say it with certainty—at any rate, I have examined several skins of full-grown Californian bears which were no larger than those of many I have seen from the northern Rockies. The Alaskan bears, particularly those of the peninsula, are even bigger beasts; the skin of one which I saw in the possession of Mr. Webster, the taxidermist, was a good deal larger than the average polar bear skin; and the animal when alive, if in good condition, could hardly have weighed less than 1400 pounds. Bears vary wonderfully in weight, even to the extent of becoming half as heavy again, according as they are fat or lean; in this respect they are more like hogs than like any other animals. HABITS OF BEAR