The family of the seals has also numerous and mighty representatives in the Arctic waters. In the sea of Bering we meet with the formidable sea-lion and the valuable sea-bear, while the harp-seal, the bearded seal, and the hispid seals (_Phoca grœnlandica_, _barbata_, _hispida_), spreading from the Parry Islands to Novaja Zemlya, yield the tribute of their flesh to numerous wild tribes, and that of their skins to the European hunter. Few Arctic animals are more valuable to man, or more frequently mentioned in Polar voyages than the walrus or morse (_Trichechus rosmarus_), which, though allied to the seals, differs greatly from them by the development of the canines of the upper jaw, which form two enormous tusks projecting downward to the length of two feet. The morse is one of the largest quadrupeds existing, as it attains a length of twenty feet, and a weight of from fifteen hundred to two thousand pounds. In uncouthness of form it surpasses even the ungainly hippopotamus. It has a small head with a remarkably thick upper lip, covered with large pellucid whiskers or bristles; the neck is thick and short; the naked gray or red-brown skin hangs loosely on the ponderous and elongated trunk; and the short feet terminate in broad fin-like paddles, resembling large ill-fashioned flaps of leather. Its movements on land are extremely slow and awkward, resembling those of a huge caterpillar, but in the water it has all the activity of the seals, or even surpasses them in speed. [Illustration: 36. WALRUSES ON THE ICE.] Gregarious, like the seals and many of the dolphins, the walruses love to lie on the ice or on the sand-banks, closely huddled together. On the spot where a walrus lands, others are sure to follow; and when the first comers block the shore, those which arrive later, instead of landing on a free spot farther on, prefer giving their friends who are in the way a gentle push with their tusks so as to induce them to make room. Timorous and almost helpless on land, where, in spite of its formidable tusks, it falls an easy prey to the attacks of man, the walrus evinces a greater degree of courage in the water, where it is able to make a better use of the strength and weapons bestowed upon it by nature. Many instances are known where walruses, which never attack but when provoked, have turned upon their assailants, or have even assembled from a distance to assist a wounded comrade.