The Encyclopaedia Britannica; Latest Edition. a Dictionary of Arts, Sciences and General Literature Volume 15

The Encyclopaedia Britannica; Latest Edition. a Dictionary of Arts, Sciences and General Literature Volume 15

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 edition. Excerpt: ...animals eminently adapted for a terrestrial life, and in the main for a vegetable diet. Though a few are more or less omnivorous, and may under some circumstances kill living creatures smaller and weaker than themselves for food, none are distinctly and habitually predaceous. Their teeth are markedly heterodont and diphyodont, --the milk set being well developed and not completely changed until the animal attains its full stature. The molars have broad crowns with tuberculated or ridged surfaces. They have no clavicles. Their toes are provided with blunt, broad nails, or in the majority of cases with hoofs, more or less enclosing the ungual phalanges. The scaphoid and lunar bones of the carpus are always distinct The whole group may be divided into the Ungtdata Vera, containing the suborders Perissodaclyla and Artiodadyla, and a less well-known assemblage of animals which may be called Subungulala or Ungtdata Polydadyla. Cope has pointed out a character in the structure of the carpus by which the latter are differentiated from the former. In all the Subungulata the bones of the proximal and distal row retain tho primitive or more typical relation to each other (see fig. 100). The os magnum of the second row articulates mainly with the lunar of the first, or with the cuneiform, but not with the scaphoid, while in the group to which the vast majority of modern r Ungulates belong the second or distal row has been shifted altogether towards the inner side of the limb (see figs. 107 and 109), so that the magnum is brought considerably in relation with the scaphoid, and is entirely removed from the cuneiform, as"in the great majority of existing mammals. SUBUNGULATA. By far the greater number of the Subungulata are extinct, and of many of...
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Product details

  • Paperback | 1094 pages
  • 189 x 246 x 54mm | 1,910g
  • United States
  • English
  • black & white illustrations
  • 1236753887
  • 9781236753885