Reports of the Princeton University Expeditions to Patagonia, 1896-1899; J. B. Hatcher in Charge Volume 6, Pts. 1-5

Reports of the Princeton University Expeditions to Patagonia, 1896-1899; J. B. Hatcher in Charge Volume 6, Pts. 1-5

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...size and slightly more concave proximal articular surface. I have seen no example of the ungual phalanx. In the pes, the first phalanx of the third digit is very much larger than the corresponding one of the second digit and is proportionately broader and more depressed, and is also slightly asymmetrical. The very shallow concavity of the proximal end is not grooved for the carina, but the notch for it on the plantar margin is much more distinct and is continued distally as a median depression between two rugose eminences on the plantar face. The distal trochlea is very nearly plane, but is a trifle more convex than in digit II. The second phalanx is likewise much larger than in digit II and proportionately broader and more depressed; the distal articular surface is decidedly saddle-shaped and is reflected upon the dorsal side of the bone, but in a more symmetrical manner than in digit II. The ungual phalanx is large and quite symmetrical, and much depressed, with thin, rugose free border, but without any trace of the median cleft, which is replaced by a low ridge. In appearance, there is considerable resemblance to the median ungual of such Eocene Perissodactyla as Palceosyops. The trochlea has two continuous facets, of which that on the tibial side is distinctly the more concave. Of digit III in the manus, I have only the second phalanx. This is relatively shorter and much broader than in the pes and has a more concave proximal surface and a similarly saddle-shaped distal trochlea, which is likewise more concave transversely. When the phalanges of the fourth digit of the pes are put together and in connection with the metatarsal, it is seen that they curve toward the median line in a peculiar and characteristic fashion, which is better shown in...show more

Product details

  • Paperback | 132 pages
  • 189 x 246 x 7mm | 249g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123652005X
  • 9781236520050