. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. 188 KIOH SCHOOL ZOOLOGY. U mouse, wliilo the Lemurs proper are of large size, attaining in the case of the tailless Indri (LichanoluH) nearly three feet in length. The other Lemurs are smaller in size and provided with a long tail which is coiled about them for warmth, while they rest during the day. In Propi- thectiH the snout is short as in the Indri, the result being a monkey-Ifke face, while in the ring-tailed lemur (L. catta) and itu allies, the snout is prolonged. 41. However monkey-like certain of
. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. 188 KIOH SCHOOL ZOOLOGY. U mouse, wliilo the Lemurs proper are of large size, attaining in the case of the tailless Indri (LichanoluH) nearly three feet in length. The other Lemurs are smaller in size and provided with a long tail which is coiled about them for warmth, while they rest during the day. In Propi- thectiH the snout is short as in the Indri, the result being a monkey-Ifke face, while in the ring-tailed lemur (L. catta) and itu allies, the snout is prolonged. 41. However monkey-like certain of the lemurs are, they form a decidedly more primitive group than that of the monkeys proper. Tliis is especially noticeable in the structure of the brain, the cerebellum being left uncovered by the cere- brum in the former group, while, in the latter, the hinder lobe of the cerebnmi is so developed as to overlap the cerebellum entirely. In this respect, as well as many ether anatomical fea- tures, the monkeys agi*ee in structure with Man, and, accord- ingly, they are genemlly placed together in the order Primates, in spite of the exceptional place which Man otherwise occupies in nature. In all Primates the incisors aro f, the inner digits (thumb and great toe) are opposable (except in man, where this is only true of the thumb), and all the Angel's are nailed, not clawed. The orbits, which have complete bony walls, ai'e di- rected forwards, and the face, in comparison with the Lemuroids, is hairless. Apart from Man, three families of Primates are recognized, two of which are New World groups. Most of the S. American i^ionkeys belong to the Platyrrhlnl, so called on account of the width of the septum of the nostrils, which causes these apertures to look outwards. The tail is usually prehensile, assisting in their ar- boreal hfe in the demie forests /?mc/.j/«rt«cait««.^l»ic*» *l»ey inhabit; they differ A8anexani))leof thit Plutyrrhini. from both the other
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
