. An introduction to zoology : for the use of high schools . not so well-marked, and the angle of the lower jaw boneis turned in, in a characteristic way, which has assisted in the identi-fication of the fossil remains of this nature. HIGH SCHOOL ZOOLOGY. 1G3 19. When we finally study the group of the higher mammalsor Eutheria, we find a wondeiful diversity of form in the differ-ent orders, depending on their habits and methods of aberrant orders may fiist be referred to, which occupy asomewhat isolated position in the sub-class. Of these theBruta or Edentata is a very heter
. An introduction to zoology : for the use of high schools . not so well-marked, and the angle of the lower jaw boneis turned in, in a characteristic way, which has assisted in the identi-fication of the fossil remains of this nature. HIGH SCHOOL ZOOLOGY. 1G3 19. When we finally study the group of the higher mammalsor Eutheria, we find a wondeiful diversity of form in the differ-ent orders, depending on their habits and methods of aberrant orders may fiist be referred to, which occupy asomewhat isolated position in the sub-class. Of these theBruta or Edentata is a very heterogeneous order, embracing tlu-ant-eaters of the Old and New Worlds, and the sloths of SoutliAmerica, The former differ very much in the clothing of theskin, for in the Indian genus Manis (Fig. 109), it is formed oflarge overlapping horny scales, while in the South AmericanJli/rmecophaga, coarse hair replaces these. Both genera have along snout and a long protrusible tongue by means of which(and the secretion of the large salivarv glands) they secure their. Fij^. 109. Scaly Aut-Eater or Iantjolia. (Mania longicaudata). /j food. The Brazilian armadillos (Daayjms) and some otherSouth American allied forms have the skin of the back andsides converted into a more or less complete shield of bonyplates, while the African Orycteropus is clothed with coarsehair. Unlike the Carnivores, the teeth, if they are present at all,are all alike, often very numerous, and there is only one set. 20. Contrasting with these forms which have all strongburrowing feet are the sloths, in which the claws are curved insuch a way as to be only useful for an arboreal life. The teethai-e less numerous than in the insect-eating armadillos, and theirsurfaces are flat and not tuberculate; the toes in accordance 164 HIGH SCHOOL ZOOLOGY. with their different function are reduced to three {Brady-pus) (Fig. 110, F) or two (Choloe^ms). Very complete remainsof extinct forms intermediate between these two subdivisionso
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1889
