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WALRUS, or MORSE (Odobaenus rosmarus)

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Originally appearing in Volume V28, Page 292 of the 1911 Encyclopedia Britannica.
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WALRUS, or See also:MORSE (Odobaenus rosmarus)  , a large marine mammal allied to the See also:seals, representing a See also:family by itself . The former word is a modification of the Scandinavian vallross or hvalros (" See also:whale-See also:horse "), the latter an See also:adaptation of the See also:Russian name for the See also:animal . A full-grown male See also:walrus See also:measures from to to 11 ft. from the See also:nose to the end of the See also:short tail, and is a heavy, bulky animal, especially thick about the shoulders . The See also:head is rounded, the eyes are rather small, and there are no See also:external ears . The muzzle is short and broad, with, on each See also:side, a See also:group of stiff, bristly whiskers, which become stouter and shorter in old animals . The tail scarcely projects beyond the skin . The fore-limbs are See also:free only from the See also:elbow; the fore-flipper is broad, See also:flat and webbed, the five digits being of nearly equal length, but the first slightly the longest . Each See also:digit has a small flattened See also:nail, situated on the inner See also:surface at a considerable distance from the end . The See also:hind-limbs are enclosed in the skin of the See also:body, almost to the See also:heel . The free portion when See also:expanded is See also:fan-shaped, the two See also:outer toes (first and fifth) being the longest, especially the latter . Flaps of skin project considerably beyond the bones of the toes . The nails of the first and fifth toes are See also:minute and flattened; those of the second, third and See also:fourth elongated, sub-compressed and pointed .

The soles of both fore and hind feet are See also:

bare, rough and warty . The surface of the skin generally is covered with short, adpressed See also:hair of a See also:light yellowish-See also:brown See also:colour, which, on the under parts of the body and See also:base of the flippers, passes into dark reddish-brown or See also:chestnut . In old animals the hair becomes more scanty, sometimes almost disappearing, and the skin shows See also:evidence of the rough See also:life and pugnacious habits of the animal in the scars with which it is usually covered . It is everywhere more or less wrinkled, especially over the shoulders, where it is thrown into deep and heavy folds . One of the most striking characteristics of the walrus is thepair of tusks which descend almost directly downwards from the upper See also:jaw, sometimes attaining a length of 20 in. or more . In the See also:female they are as See also:long or sometimes longer than in the male, but less massive . In the See also:young of the first See also:year they are not visible . These tusks correspond to the canine See also:teeth of other mammals . All the other teeth, including the See also:lower canines, are much alike—small, See also:simple and one-rooted, and with crowns, rounded at first, but wearing to a flat or See also:concave surface . Many of the teeth are lost See also:early, or remain through life in a rudimentary See also:state concealed beneath the See also:gum . The tusks are formidable weapons of See also:defence, but their See also:principal use seems to be scraping and digging among See also:sand and See also:shingle for the molluscs and crustaceans on which the walrus feeds . They are said also to aid in climbing up the slippery rocks and ledges of See also:ice on which so much of the animals life is passed .

Walruses are more or less gregarious in their habits, being met with generally in companies or herds of various sizes . They are only found near the See also:

coast or on large masses of floating ice, and rarely far out in the open See also:sea; and, though often moving from one See also:part of their feeding-ground to another, have no See also:regular migrations . Their young are See also:born between See also:April and See also:June, sta The See also:Atlantic Walrus (Odobaenus rosmarus) . usually but one at a See also:time, never more than two . Their strong See also:affection for their young, and their sympathy for each other in danger, have been noticed by all who have had the opportunity of observing them in their haunts . When one is wounded the whole See also:herd usually join in defence . Although harmless and in-offensive when not molested, they exhibit considerable fierceness when attacked, using their tusks with tremendous effect either on human enemies who come into too See also:close quarters or on polar bears, the only other adversary they can meet with in their own natural territory . The See also:voice, a loud roaring, which can be heard at a See also:great distance, is described by Dr See also:Kane as " something between the mooing of a cow and the deepest baying of a mastiff, very See also:round and full, with its bark or detached notes repeated rather quickly seven or nine times in See also:succession." The principal See also:food of the walrus consists of bivalve molluscs, especially Ilya truncata and Saxicava rugosa, two See also:species very abundant in the See also:Arctic regions, which it digs up from the mud and sand in which they See also:lie buried at the bottom of the sea by means of its tusks . It crushes and removes the shells by the aid of its grinding teeth and See also:tongue, and swallows only the soft parts of the animal . It also feeds on other molluscs, sand-See also:worms, See also:star-fishes and shrimps . Portions of various kinds of seaweed have been found in its See also:stomach, but whether swallowed intentionally or not is doubtful . The commercial products of the walrus are its oil, hide (used to manufacture See also:harness and See also:sole-See also:leather and See also:twisted into tiller-See also:ropes) and tusks .

The See also:

ivory of the latter is, however, inferior in quality to that of the See also:elephant . Its flesh forms an important See also:article of food to the See also:Eskimo and See also:Chukchi . Of the coast tribes of the last-named See also:people the walrus formed the See also:chief means of support . Walruses are confined to the See also:northern circumpolar regions; extending apparently as far See also:north as explorers have penetrated . On the Atlantic coast of See also:America the Atlantic species was met with in the 16th See also:century as See also:low as the See also:southern coast of Nova See also:Scotia, and in the last century was See also:common in the Gulf of St See also:Lawrence and on the shores of Labrador . It still inhabits the coast round See also:Hudson's See also:Bay, See also:Davis Strait and See also:Greenland, where, however, its See also:numbers are decreasing . It is not found on the Arctic coast of America between the 97th and 158th meridians . In See also:Europe, occasional stragglers have reached the See also:British Isles; and it was formerly abundant on the coasts of Finmark . It is rare in See also:Iceland, but Spitzbergen, Novaia Zemblia and the western part of the north coast of See also:Siberia are See also:constant places of resort . The North Pacific, including both sides of See also:Bering Strait, northern See also:Kamchatka, See also:Alaska and the Pribyloff Islands are also the haunts of numerous walruses, which are isolated from those of the North Atlantic by long stretches of coast in Siberia and North America where they do not occur . The Pacific walrus appears to be as large as, if not larger than, that of the Atlantic; its tusks are longer and more slender, and curved inwards; and the whiskers are smaller, and the muzzle relatively deeper and broader . These and certain other See also:differences have led to its being considered specifically distinct, under the name of Odobaenus obesus .

Its habits appear to be similar to those of the Atlantic See also:

form . Though formerly found in immense herds, it is becoming scarce, as the methods of destruction used by See also:American whalers are more certain than those of the Chukchi, to whom the walrus long afforded the principal means of subsistence . Fossil remains of walruses and closely allied animals have been found in the See also:United States, and in See also:England, See also:Belgium and See also:France, in deposits of See also:late See also:Tertiary See also:age . (W . H . F.; R .

End of Article: WALRUS, or MORSE (Odobaenus rosmarus)
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