Palaeontology of New York Volume 2

Palaeontology of New York Volume 2

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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. 1852 edition. Excerpt: ...arranged along their margins, and parallel to the same. There are also round or oval depressions with raised margins, many of them penetrating the plates. These depressions, or pore-like orifices, are indiscriminately scattered over the surface, sometimes near the junction of the plates, or in the line of separation, and sometimes at a distance from the margins. The irregularity of their arrangement induces hesitation in regarding them as pores communicating with the interior. Fig. 5 i. Several of these plates enlarged, showing more distinctly the arrangement of tubercles and pore-like openings mentioned above. The form of this cup is more spreading from the base upwards, than any specimen that ha3 fallen under my observation. Position and locality. This fragment was found in the Niagara shale at Marshall's mill, in the town of Sweden, Monroe county. In a paper recently read before the American Association for the Advancement of Science, giving a list of the Fossil Crinoids of Tennessee, by Prof. Troost of Nashville, ten species are given under the Genus Eucalyptocrinites, viz. E. splendidus, ovalis, extensus, Itevis, phillippsii, goldfussii, nashvilla, conicus, tennesssete, and gibbosus. It seems to me very probable, from the names of some of these, that specimens which I have regarded only as varieties are given the rank of species. It is certainly very remarkable that so large a number of species of a genus having the singular structure of Eucalyptocrinus should be found in one region. The entire list, however, shows a most remarkable development of this family within the limits of Tennessee. Unfortunately the geological position of these fossils is not given, and we can only infer that they are from the strata embraced between the base of the...
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Product details

  • Paperback | 188 pages
  • 189 x 246 x 10mm | 345g
  • Miami Fl, United States
  • English
  • Illustrations, black and white
  • 1236578309
  • 9781236578303