Geology and Paleontology of the Judith River Beds

Geology and Paleontology of the Judith River Beds

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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. 1905 edition. Excerpt: ...AUIBLYSODON MIRANDUB Leidy. Aublysodon mirandus Leidy, 1868, Proc. Acad. Nat. Sci. Philadelphia, 1868, p. 198. This species was founded on detached teeth from the Judith River beds of Montana. These teeth are variable in size and character. Their nature is problematical. Marsh has suggested that some of the smaller forms might possibly be mammalian. It seems more probable, however, that they are all reptilian and that they pertain to some form of carnivorous dinosaur. In general form the teeth are subconical, flattened on one side and convex on the other, with a rather blunt apex. Teeth of this character are fairly common both in the Judith River beds and the Laramie. Marsh" has named without describing two species of the present genus, A. amphw and A. cristatus, from material found "in the Ceratops beds of Montana and Wyoming." Since neither of these species was "properly described by Marsh, they may as well be abandoned. While, as remarked above, teeth of the same pattern as those described and figured by Leidy are common in both the Laramie and the Judith River beds, they do not of themselves afford characters of suflicient importance to distinguish either genera or species. PABOHYOHODON LAOUSTBIS Cope. Paronychodon lacuatris Cope, 1876, Proc. Acad. Nat. Sci. Philadelphia, 1876, p. 256. This species was founded on detached teeth with subconic crowns, "one side of which is convex and the other side plane." After a comparison of Cope's description of the present genus and species with Leidy's description and figures of the preceding, it is evident that the teeth described by Cope are of the same form as those described by Leidy. Since Cope's material was derived from the same general...show more

Product details

  • Paperback | 74 pages
  • 189 x 246 x 4mm | 150g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236864239
  • 9781236864239