Palaeontographical Society Monographs Volume 43, Nos. 204-207

Palaeontographical Society Monographs Volume 43, Nos. 204-207

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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. 1890 edition. Excerpt: ...We must, therefore, take the figure as it stands, and judge it on its merits. The specimen which Dr. Hang sent me, and which is here figured, is from the Opal'in'umzone, Gundershofen. When I come to the genus Dumortierial shall have more to say about this interesting species, and shall then point out why the straightness of the rib upon the lateral area is such an important feature. FIGS. 2 a, b.--Copy of Reinecke's original figure of" Nautilus radians," ' Maris Protogari Nnutilos et Argonnntos, ' &c., figs. 39, 40. FIGS. 3 a, b, c.---A specimen sent to me by Dr. Hang as " Grammoceraa radians," to be figured in comparison with Reinecke's original. The small curvature of the ribs on the lateral area and the absence of the long ventral projection should be compared with the figures of the genus Grammoceras. (Natural size.) Opalimnn-zone, Gundershofen. Since I have thus interpreted Reinecke's Am. radians in a manner different from every other author, except Quenstedt in part, I have of course to give a fresh name to the species which was figured by d'Orbigny as Am. radians. Dr. Hang suggested to me that it would be preferable to consider d'Orbigny's Am. radians as the type of the species, and to strike Reinecke's figure out of the question altogether; but I am extremely reluctant so to violate the law of priority when the figure can really be identified, to my complete satisfaction, with specimens of Dumorbieria in my own cabinet, not to mention those in Dr. Haug's as proved by what he sent me. I think, in this case, we have no excuse to justify such a proceeding. Neither is there any reason why d'Orbigny's figure should be taken as the type....show more

Product details

  • Paperback | 140 pages
  • 189 x 246 x 8mm | 263g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123697090X
  • 9781236970909