Fossil Vertebrates Volume 4

Fossil Vertebrates Volume 4

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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. 1909 edition. Excerpt: ...but in so difficult a group as the Cetacea, it seems best to consider that such is the case. In this account, .'otoccfu.s Moreno, 1892, is regarded as preoccupied by N otiocetus Ameghino, 1891. The specimen of Diochotichus under consideration consists of (1) a nearly perfect cranium, which, however, lacks the earbones, nasals, palatines and teeth; (2) the mandible, whichlacks the condyles and about one-half the symphysis; (3) the atlas and six thoracic vertebrie, all nearly perfect; (4) three ribs, one nearly perfect; and (5) a few miscellaneous fragments. The skull and vertebrae have been partly restored, the anterior end of the symphysis of the mandible, the tips of the processes of the vertebrae, etc., having been added in plaster. The cranium is a little fractured and compressed in the region of the left maxillary notch, so that the breadth across the orbits is less than it was originally. The terminal alveolus is lacking on the right side, and three others in the middle of the series on the same side have been restored. The rami of the mandible are fractured longitudinally and considerably depressed, and 12 pairs of alveoli have been added to the s_vmph_vsis anteriorly to restore it to its original length. ' Firle Trouessart. The dimensions of the skull, together with those of the type, as given by Total length of skull........-.. Length of rostrum... Lengthofbraincase.......... Greatest breadth between parieto-occipital bor-de1s, .............. Height of occiput, between upper margin of fora men magnum and occipital crest Height of foramen magnum Breadth " " " Height of occipital condyles Length of temporal fossa......_. Greatest height of temporal fossa..... Least distance between temporal iossae more

Product details

  • Paperback | 156 pages
  • 189 x 246 x 8mm | 290g
  • United States
  • English
  • black & white illustrations
  • 123694853X
  • 9781236948533