Observations on the Genus Unio, Vol. 6

Observations on the Genus Unio, Vol. 6 : Together with Descriptions of New Species in the Family Unionidae; Read Before the Academy of Natural Sciences of Philadelphia and Published in Their Journal; Part I, 1857 (Classic Reprint)

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Excerpt from Observations on the Genus Unio, Vol. 6: Together With Descriptions of New Species in the Family Unionidae; Read Before the Academy of Natural Sciences of Philadelphia and Published in Their Journal; Part I, 1857 Shell winged, smooth, subrotund, somewhat inflated and very inequilateral valves thick; beaks rather prominent and angular; epidermis yellowish brown; cardinal teeth thick, crenulate and elevated; lateral teeth long, thick and somewhat curved. 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.show more

Product details

  • Paperback | 696 pages
  • 152 x 229 x 35mm | 916g
  • Forgotten Books
  • United States
  • English
  • , black & white illustrations
  • 0243100477
  • 9780243100477