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HIPPOPOTAMUS (" river-horse," Gr. lam...

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Originally appearing in Volume V13, Page 523 of the 1911 Encyclopedia Britannica.
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HIPPOPOTAMUS (" See also:river-See also:horse," Gr. lames, horse and aoraµbs, river)  , the name of the largest representative of the non-ruminating artiodactyle ungulate mammals, and its living and See also:extinct relatives . The See also:common See also:hippopotamus (Hippopotamus amphibius), which formerly inhabited all the See also:great See also:rivers of See also:Africa but whose range has now been much restricted, is most likely the See also:behemoth of Scripture, and may very probably in Biblical times have been found in the See also:Jordan valley, since at a still earlier (See also:Pleistocene) See also:epoch it ranged over a large See also:part of See also:Europe . It typifies not only a genus, but likewise a See also:family, Hippopotamidae, distinguished from its relatives the pigs andsound; the eyes are placed high up on the See also:head, but little below the level of the ears; while the gape is wide, and the upper See also:lip thick and bulging so as to See also:cover over even its large tusks when the mouth is closed . The molars, which show See also:trefoil-shaped grinding-surfaces are well adapted for masticating See also:vegetable substances, while the formidable See also:array of See also:long See also:spear-like incisors and curved See also:chisel-edged canines or tusks See also:root up See also:rank grass like an agricultural See also:implement . The legs are See also:short, so that the See also:body is but little elevated above the ground; and the feet, which are small in proportion to the See also:size of the See also:animal, terminate in four short toes each bearing a small hoof . With the exception of a few tufts of See also:hair on the lips, on the sides of the head and See also:neck, and at the extremity of the short robust tail, the skin of the hippopotamus, some portions of which are 2 in. in thickness, is destitute of covering . Hippopotamuses are gregarious animals, living in herds of from 20 to 40 individuals on the See also:banks and in the beds of rivers, in the neighbourhood of which they most readily find appropriate See also:food . This consists chiefly of grass and of aquatic See also:plants, of which these animals consume enormous quantities, the See also:stomach being capable of containing from 5 to 6 bushels . They feed principally by See also:night, remaining in the See also:water during the See also:day, although in districts where they are little disturbed they are less exclusively aquatic . In such remote quarters, they put their heads boldly out of the water to See also:blow, but when rendered suspicious they become exceedingly cautious in this respect, only exposing their nostrils above the water, and even this they prefer doing amid the shelter of water plants . In spite of their enormous size and uncouth See also:form, they are See also:expert swimmers and See also:divers, and can remain easily under the water from five to eight minutes . They walk on the bottoms of rivers, beneath at least 1 ft. of water .

At nightfall they come on See also:

land to feed; and when, as often happens on the banks of the See also:Nile, they reach cultivated ground, they do immense damage to growing crops, destroying by their ponderous tread even more than they devour . To scare away these unwelcome visitors the natives in such districts are in the See also:habit of kindling fires at night . Although hippopotamuses do not willingly go far from the water on which their existence depends, they occasionally travel long distances by night in See also:search of food, and in spite of their clumsy See also:appearance are able to climb steep banks and precipitous ravines with ease . Of a wounded hippopotamus which See also:Sir S . See also:Baker saw leaving the water and galloping inland, he writes: " I never could have imagined that so unwieldy an animal could have exhibited such See also:speed . No See also:man could have had a See also:chance of See also:escape." The hippopotamus does not confine itself to rivers and lakes, but has been known to prefer the See also:waters of the ocean as its See also:home during the day . Of a mild and inoffensive disposition, it seeks to avoid collision with man; when wounded, however, or in See also:defence of its See also:young, it exhibits great ferocity, and native canoes are capsized and occasionally demolished by its infuriated attacks; the bellowing grunt then becoming loud enough to be heard a mile away . As among elephants, so also among hippopotamuses there are " rogues "—old bulls which have become soured in solitude, and are at all times dangerous . Assuming the offensive on every occasion, they attack all and sundry without See also:shadow of provocation; and the natives avoid their haunts, which are usually well known . The only other living See also:species is the See also:pygmy hippopotamus, H . (Choeropsis) liberiensis, of See also:West Africa, an animal not larger than a clumsily made See also:pig of full dimensions, and characterized by having generally one (in See also:place of two) pair of incisors . It is much less aquatic than its See also:giant relative, having, in fact, the habits of a pig .

A small extinct species (H. lemerlei) inhabited See also:

Madagascar at a comparatively See also:recent date; while other See also:dwarf kinds were natives of See also:Crete (H. minutes) and See also:Malta and See also:Sicily (H. pentlandi) during the Pleistocene . A large form of the See also:ordinary species (H. amphibius See also:major) was distributed over Europe as far See also:north as See also:Yorkshire at the same epoch; while an allied species (H. palaeindicus) inhabited Pleistocene See also:India . Contemporary with. the latter was, however, a species (H. namadicus) with three pairs of incisors; and " hexaprotodont " hippopotamuses are --es - -' =s., The Hippopotamus (Hippopotamus amphibius) . peccaries, or Suidae, by the following assemblage of characters: Muzzle very broad and rounded . Feet short and broad, with four subequal toes, bearing short rounded hoofs, and all reaching the ground in walking . Incisors not rooted but continuously growing; those of the upper See also:jaw curved and directed down-wards; those of the See also:lower straight and procumbent . Canines very large, curved, continuously growing; upper ones directed downwards . Premolars I ; molars . Stomach complex . No caecum . In form the hippopotamus is a huge, unwieldy creature, measuring in the largest specimens fully 14 ft. from the extremity of the upper lip to the tip of the tail, while it ordinarily attains a length of 12 ft., with a height of 5 ft. at the shoulders, and a girth See also:round the thickest part of the body almost equal to its length . The small ears are exceedingly flexible, and kept in See also:constant See also:motion when the animal is seeking to catch a distant also characteristic of the See also:Pliocene of India and See also:Burma (H. sivalensis and H. iravadicus), and of See also:Algeria, See also:Egypt and See also:southern Europe (H. hipponensis) .

For the ancestral genera of the hippopotamus See also:

line, see See also:ARTIODACTYLA . (R .

End of Article: HIPPOPOTAMUS (" river-horse," Gr. lames, horse and aoraµbs, river)
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