. Natural history. Zoology. 134 MAMMALIA—ORDER VI.— Fig. 72.—Bush-Pig (Sus africanua). North Africa, Asia Minor, and Central Asia, replaced in India by the closely allied & cristatns. India is tlie home of the smallest species, tlie pigmy hog (S. salvanius) of the Bhutan terai, which scarcely exceeds a hare in size. Numerous species inhabit tlie Malayan countries and islands as far east as Celebes and the Pliilippines, wliile one, -vvliich may, however, have been in- troduced, is found in New Guinea. Africa south of the Sahara has but one of the more typical representatives of th
. Natural history. Zoology. 134 MAMMALIA—ORDER VI.— Fig. 72.—Bush-Pig (Sus africanua). North Africa, Asia Minor, and Central Asia, replaced in India by the closely allied & cristatns. India is tlie home of the smallest species, tlie pigmy hog (S. salvanius) of the Bhutan terai, which scarcely exceeds a hare in size. Numerous species inhabit tlie Malayan countries and islands as far east as Celebes and the Pliilippines, wliile one, -vvliich may, however, have been in- troduced, is found in New Guinea. Africa south of the Sahara has but one of the more typical representatives of the genus, which inhabits the Senhaar districts. Elsewhere in that con- tinent, as well as in the adjacent island of Madagascar, the place of the typical sv/ine is taken by tlie busli-pigs, wliicli are frequently re- garded as representing a distinct genus, under the name of Potamo- chcerus. Tlie busli-pigs have long, pencilled ears, and tend to lose the anterior premolar teeth in both jaws, while their molars are of simpler structure than those of tlie other members of the genus. Of the two African species, S. africnnus, ranging from South to Central Africa, has grey hair, whereas in the West African S. purcus the colour is red, and the pencilled ears are of great length. The other two genera of swino differ from the foregoing in having uniformly coloured young, both being remarkable for the extraordinary development of the tusks of the males. This feature attains its maximum in the babirusa (Bahirnsa alfiirus) of the island of Celebes, in tlie males of which the upper tusks pierce the skin of the face, and curve backwards over the eyes in a manner recalling the horns of the chamois. The lower tusks, which are equally long and slender, curve backwards in a somewhat similar manner, but do not wear against the upper jiair. There are but two pairs of upper incisors, and only two pairs of premolars in each jaw. In appearance, the babirusa is a rather short-bodied and long-limb
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