The Atlantic Volume 49

The Atlantic Volume 49

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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. 1882 edition. Excerpt: ...of geological time had elapsed before the lowest vertebrate forms had begun to leave plentiful traces of themselves in the rocks. The Devonian epoch, in which we find the first record of insects, carries us half-way through the eighth aeon; and we are brought well on into the ninth by the Carboniferous age, in which appear the earliest air-breathing vertebrates in the shape of frog-like amphibians. The vegetation of this period consisted chiefly of ferns, club-mosses, and horse-tails, with amucarian pines. Nearly nine tenths of the past life history of our globe accomplished, and as yet no birds or mammals, perhaps no true reptiles, nor any tree save the araucaria or the arborescent fern! Vith the Permian epoch we reach the end of the Primary period and nearly complete our ninth azon, leaving for the whole of the Secondary and Tertiary periods only a little more than one aeon to be divided between them. The oldest mammals and reptiles yet found belong to the Trias, or earliest Secondary epoch; yet so many small mammalia, inferior in type to the marsupials, have been found by Professor Marsh far down in the Trias as to warrant the belief that mammals had ap ing through the sea, and flying on swift bat-like wing overhead. Of these innumerable "dragons of the prime," the iguanodon, from fifty to seventy feet in length, used to be supposed the largest; but Professor Marsh has lately discovered the atlantosaurus of Colorado, over sixty feet in length and thirty feet in height, --the largest land animal as yet known. The mammals contemporary with these monsters seem to have been mostly small insect-eating marsupials; and the forests through which they roamed consisted mainly of palms, tree-ferns, and pines. In the Cretaceous epoch...
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Product details

  • Paperback | 538 pages
  • 189 x 246 x 28mm | 948g
  • United States
  • English
  • black & white illustrations
  • 1236895622
  • 9781236895622