Natural Science Volume 1

Natural Science Volume 1

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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. 1892 edition. Excerpt: ...had appeared, no papers of any importance had been published on the Rhizopoda of our English Chalk or Gault. That reproach has now been partly swept away by the detailed report on the "Foraminifera of the Red Chalk," by Messrs. Burrows, Sherborn, and Bailey, which appeared in 1890, and by the commencement of a monograph on the "Foraminifera of the Gault," by Mr. Frederick Chapman. Both these papers have been published by the Royal Microscopical Society in their Journal, and, as they have been fully illustrated, will form most valuable reference papers for a long time to come. Of the "Foraminifera of the Gault," Part I. deals with the Miliolininte and the Peneroplidina:, and was issued in August, 1891; the second part, describing the Arenaceous forms, was published in June; further continuations are promised. Mr. Chapman has treated the subject in a most exhaustive manner; he has confined his attention mainly to the Folkestone sections, and has worked out large samples of the clay from every zone in the Gault at that place. In his papers, therefore, we get not merely a list of the species found in the Gault, compiled from lumps of clay collected at random, but a definite and exact report on the forms found at every horizon, with their distribution above or below. Thus, in dealing with Miliolina venusta (Karr.), we read: "This Foraminifera makes its appearance in the Gault in zone x., where it is very common; also in zone xi., 55 ft. from the top, very common; 50 ft., very common; 45 ft., frequent; 40 ft., frequent; 35 ft., frequent; 30 ft., frequent; 25 ft., very common; 20 ft., common; 12 ft., common; 6 ft., very rare." It is interesting to note the comparative rarity of some genera; thus, out of the many...show more

Product details

  • Paperback | 382 pages
  • 189 x 246 x 20mm | 680g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236617002
  • 9781236617002