Enumeration of Fossils Collected in the Niagara Limestone at Chicago, Illinois

Enumeration of Fossils Collected in the Niagara Limestone at Chicago, Illinois : With Descriptions of Several New Species (Classic Reprint)

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Excerpt from Enumeration of Fossils Collected in the Niagara Limestone at Chicago, Illinois: With Descriptions of Several New Species Polypary consisting of a mass of crowded cylindrical tubes arranged in ramose and folia ceous forms, both forms being sometimes united in one specimen. The earlier growth, in one Of our specimens, is explanate. The cells are elongated, obliquely horizontal, crowded, overlapping, with their mouths Opening obliquely through the epitheca. The frond devel ops into an irregularly undulate form, sometimes dividing, and some of the lobes bending round laterally, after the manner of one or two turns of an Archimedes. From the border of the frond arise terete, bifurcating branches, with the mouths Opening on all sides. All the cell-mouths are somewhat crescentiform, the outer lip often slightly indented, and some times sufficiently so to give the mouth a triangular outline. In exfoliated, weathered specimens, the cells are seen to be cylindrical and separately walled, but closely in contact. The width of three of these cells occupies the space of one tenth of an inch; their length is about a third of an inch. No evidences of septa or la mellac can be detected. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Product details

  • Paperback | 46 pages
  • 152 x 229 x 3mm | 77g
  • English
  • 9 Illustrations; Illustrations, black and white
  • 0243129815
  • 9780243129812