. Texte livre de zoologie. Zoologie. La classe 6. Mammalia. Ordre 12. Bodentia. 531 (c) Subungulata. Bref, griffes hoof-like, des jambes pour la plupart, d'ordinaire, le nombre d'digitigrades orteils sur le pied arrière varie ; l'avant-pied, avec quatre chiffres, bien développé et avec ou sans queue rudimentaire pollex, petites ou absentes : toutes dans le sud ou l'Amérique centrale. Les Pacas (paca) Caelogenys avec iive orteils : l'Agoutis (Basyprocta) : le cobaye (Cavia cobaya) : le capybara {rochceriis capyha/HYD/ra) ; toutes avec trois doigts ; ce dernier est le plus grand de tous les rongeurs ; dans les rivières d'Amérique du Sud. L'ordre 1

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. Text book of zoology. Zoology. Class 6. Mammalia. Order 12. Bodentia. 531 (c) Subungulata. Claws short, hoof-like, legs for the most part long, usually digitigrade; the number of toes on the hind foot varies; forefoot, with four well-developed digits, and with or without a rudimentary pollex; tail small or absent: all in South or Central America. The Pacas (Caelogenys paca) with iive toes: the Agoutis (Basyprocta): the Guinea-pig (Cavia cobaya): the Capybara {Hyd/rochceriis capyha/ra); all with three toes; the last-named is the largest of all living Rodents; in South American rivers. Order 13. PrOSimiSB (lemurs). As in tlie Apes, with which the Lemurs were formerly grouped^ the first digit on both fore and hind limbs is separated from the others, and is opposable. On the hind foot, usually only the second toe has a claw, the other fingers and toes are provided with flat nails. The fore limbs are shorter than the hind. Of teeth, there are at most i ^, c -f, p ^, m |-; often, however, the number is smaller. The upper incisors are generally small, and there is usually a median diastema; the lower incisors and canines are all alike, narrow and directed obliquely for- wards ; the upper canines are caniniform; all the premolars (or the anterior ones alone) are compressed and triangular (the first of the lower jaw is canini- form) ; the other molars tubercular, or each with two transverse ridges. Most of the Lemurs are very hairy, many have long tails. The skeleton difiers in many respects from that of Apes; for instance, the orbit is in- complete behind, and as in other Mammalia, remains in widely open communi- cation with the temporal fossa (there is, however, as in various other Mammals, a closed ring of bone round the orbit) j the rami of the mandible are usually sepa- rate; the facial region of the skull is larger in proportion to the cranial part than in most Monkeys. The uterus has two long horns (uterus bicornis). There is a pair of thoracic, sometimes also a pai

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