Himalayan Fossils Volume 1, PT. 1

Himalayan Fossils Volume 1, PT. 1

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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. 1906 edition. Excerpt: ...ribs in the upper half of the sides is very small. Two marginal tubercles correspond, as a rule, to one primary stem-rib. In its general shape this species agrees very nearly with Tibetites R3/alli v. Mojs. and with Oyrtopleurites Herodoti v. M ojsisovics (Cephalopoden der Hallstaetter Kalke, 1. e. VI-2, p. 518, Taf. OLVIII, fig. 10). The whorls overlap one another almost completely and are strongly compressed, the transverse section being considerably higher than broad. The umbilicus is comparatively wide. The narrow and slightly depressed mesial band, which is enclosed within the external ears, undergoes no change from the beginning up to the aperture of the last volution. Dimensions. Diameter of the shell.......... 39 mm.,, umbilicus.......... 4-5, Height of the above the umbilical suture...... 221', last volution, preceding whorl.-.... 17, Thickness of the last volution........ 14, S'uture.s.--Not known in detail. A more exact characterisation is not possible on account of the defective preservation of the sutural line. A few fragments of Orthoceras, unworthy of illustration, are only suflicient to determine the genus. There are at least two species present. The fragment of a large body-chamber, with parts of the striated shell adhering to the cast, belongs to the group of Orthocerata striata. The majority of isolated air-chambers belongstoaspecies of the group of 0. lrevia. Their dimensions and the small angle of divergency remind one of Orthoceras triadicum v. Mojsisovics (Gephalopoden der Hallstaetter Kalke, 1. c. VI-1, p. 4, Taf. I, figs. 2, 3), but their incomplete state of preservation renders them unfit for specific determination. 1873. Nautilus triarlicus E. v. Mojsisovics, Cephalop)den der Hallstaettet...show more

Product details

  • Paperback | 48 pages
  • 189 x 246 x 3mm | 104g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236754212
  • 9781236754219