GRIZZLY BEAR (Ursus Iiorribilis), the most dangerous and, on the average, the largest of all living bears, its only rival being the polar bear (q.v.). An inhabitant of western North America, this bear originally ranged from Mexico to Alaska and from the Pacific coast far into the prairies. It is now, however, restricted to the wilder parts of the Rocky mountains and Sierra Nevada, reaching its greatest development, both as regards size and numbers, in the north. The fur is variable in colour, but is most commonly brownish yellow, with a black stripe on the back and reddish mane. An average large specimen of the grizzly bear may be 9 ft. long and i,000 lb. in weight. (See BEAR, CARNIVORA.)