The Ursus labiatus seldom produces more than two or three at a birth, and the young cub is extremely ugly, but immensely powerful in limbs and claws. I have seen a very young animal which held on to the inside of its basket when inverted, and although shaken with great force, nothing would dislodge its tenacious clutch; this specimen was about six weeks old. Although many varieties of bears are tree-climbers, there are others which are contented with the ground, and which could not ascend a tree even should they be tempted by its fruit. The grizzly bear (Ursus ferox) belongs to this class, and his enormous weight would at any time necessitate especial care when experimenting upon the strength of boughs. I do not believe that any person has actually weighed a grizzly, but an approximate idea may be obtained through a comparison with the polar bear (Ursus maritimus), which is somewhat equal in size, probably superior. When I was in California, experienced informants assured me that no true grizzly bear was to be found east of the Pacific slope, and that Lord Coke was the only Britisher who had ever killed a real grizzly in California. There are numerous bears of three if not four varieties in the Rocky Mountains, and these are frequently termed grizzlies, as a misnomer; but the true grizzly is far superior in size, although similar in habits, and his weight varies from 1200 to 1400 lbs. Mr. Lamont, in his interesting work Yachting in the Arctic Seas, gives the most accurate account of all Arctic animals that he killed, and having the advantage of his own yacht, he was able to weigh the various beasts, and thus afford the most valuable information in detail. This is his account of a polar bear (Ursus maritimus) which he himself killed :- "He was so large and heavy that we had to fix the ice-anchor, and drag him up with block and tackle, as if he had been a walrus. This was an enormous old male bear, and measured upwards of 8 feet in length, almost as much in circumference, and 4 1/2 feet at the shoulder; his fore paws were 34 inches in circumference, and had very long, sharp, and powerful nails; his hair was beautifully thick, long, and white, and hung several inches over his feet. He was in very high condition, and produced nearly 400 lbs. of fat; his skin weighed upwards of 100 lbs., and the entire carcase of the animal cannot have been less than 1600 lbs."