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See also:PORCUPINE (Fr., See also:pore-epic, " spiny See also:pig ") , the name of the largest See also:European representative of the terrestrial rodent mammals, distinguished by the spiny covering from which it takes its name . The European See also:porcupine (Hystrix cristata) is the typical representative of a See also:family of Old See also:World rodents, the Hyslricidae, all the members of which have the same protective covering . These rodents are characterized by the imperfectly rooted cheek-See also:teeth, imperfect clavicles or See also:collar-bones, cleft upper See also:lip, rudimentary first front-toes, smooth soles, six teats and many See also:cranial characters . They range over the See also:south of See also:Europe, the whole of See also:Africa, See also:India and the See also:Malay See also:Archipelago as far See also:east as See also:Borneo . They are all stout, heavily-built animals,with See also:blunt rounded heads, fleshy See also:mobile snouts, and coats of thick cylindrical or flattened spines, which See also:form the whole covering of their See also:body, and are not intermingled with See also:ordinary hairs . Their habits are strictly terrestrial . Of the three genera Hystrix is characterized by the inflated See also:skull, in which the nasal chamber is often considerably larger than the See also:brain-See also:case, and The Porcupine (Hystrix cristata) . the See also:short tail, tipped with numerous slender-stalked open quills, which make a loud rattling See also:noise whenever the See also:animal moves . The See also:common porcupine (H. cristata), which occurs throughout the south of Europe and See also:North and See also:West Africa, is replaced in South Africa by H. africaeaustralis and in India by the hairy-nosed porcupine (H. leucura) . Besides these large crested See also:species, there are several smaller species without crests in north-east India, and the Malay region from See also:Nepal to Borneo . The genus Atherura includes the See also:brush-tailed porcupines which are much smaller animals, with See also:long tails tipped with bundles of flattened spines . Two species are found in the Malay region and one in West Africa . Trichys, the last genus, contains two species, T. fasciculata of Borneo and T. macrotis of See also:Sumatra, both externally very like Atherura, but differing from the members of that genus in many cranial characteristics . In the New World the porcupines are represented by the members of the family Erethizontidae, or Coendidae, which have rooted molars, See also:complete collar-bones. entire upper lips, tuberculated soles, no trace of a first front-toe, and four teats . The spines are mixed with long soft hairs . They are less strictly nocturnal in their habits; and with one exception live entirely in trees, having in See also:correspondence with this long and powerful prehensile tails . They include three genera, of which the first is represented by the See also:Canadian porcupine (Erethizon dorsatus), a stout, heavily-built animal, with long hairs almost or quite hiding its spines, four front- and five See also:hind-toes, and a short, stumpy tail . It is a native of the greater See also:part of See also:Canada and the See also:United States, wherever there is any remnant of the See also:original See also:forest See also:left . Synetheres, or Coendu, contains some eight or ten species, known as See also:tree-porcupines, found throughout tropical South See also:America, with one extending into See also:Mexico . They are of a lighter build than the ground-porcupines, with short, See also:close, many-coloured spines, often mixed with hairs, and prehensile tails . The hind-feet have only four toes, owing to the suppression of the first, in See also:place of which they have a fleshy See also:pad on the inner See also:side of the See also:foot, between which and the toes boughs and other See also:objects can be firmly grasped as with a See also:hand . Chaetomys, distinguished by the shape of its skull and the greater complexity of its teeth, contains C. subspinosus, a native of the hottest parts of See also:Brazil . (W . H . F.; R . |
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