Report of the Meeting of the British Association for the Advancement of Science Volume 10

Report of the Meeting of the British Association for the Advancement of Science Volume 10

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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. 1842 edition. Excerpt: ...retains unaltered throughout the whole series of oolitic strata, is no approximation to the ball-and-socket structure of modern Crocodiles which first appears in the Mosasaurus and the Eocene Crocodiles, but is the very reverse. As reasonably might we infer that the Teleosaur was an intermediate form between the Streptospondylus and modern Crocodiles, and that the anterior ball had first subsided, and a sub-biconcave type of vertebrae had been produced before the posterior ball, which characterizes the vertebrae of recent Crocodiles, was finally developed. If the present species of animals had resulted from progressive development and transmutation of former species, each class ought now to present its typical characters under their highest recognized conditions of organization: but the review of the characters of fossil Reptiles, taken in the present Report, proves that this is not the case. No reptile now exists which combines a complicated and thecodont dentition with limbs so proportionally large and strong, having such well-developed marrow bones, and sustaining the weight of the trunk by synchondrosis or anchylosis to so long and complicated a sacrum, as in the order Dinosauria. The Megalosaurs and Iguanodons, rejoicing in these undeniably most perfect modifications of the Reptilian type, attained the greatest bulk, and must have played the most conspicuous parts, in their respective characters as devourers of animals and feeders upon vegetables, that this earth has ever witnessed in oviparous and cold-blooded creatures. They were as superior in organization and in bulk to the Crocodiles that preceded them as to those which came after them. There is not the slightest ground for affirming that the procoelian Gavial of the present day...
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Product details

  • Paperback
  • 189 x 246 x 14mm | 490g
  • United States
  • English
  • black & white illustrations
  • 1236917278
  • 9781236917270