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Excerpt from Fauna From the Eocene of Washington Description. - Shell large and rectangular in outline; nearly equilateral; beaks prominent, umbonal area broad; hinge line straight; cardinal area narrow; dorsal line sloping slightly from the beaks; anterior end rounded, passing into the ventral margin with a curve; ventral margin only slightly curved, extending abruptly into the posterior end; posterior end straight; posterior end is more flaring and concave than the anterior end; there is a tendency for a slight umbonal ridge to extend from the beaks to the posterior ventral margin; shell ornamented with 22 flat-topped, wide, very prominent radiating ribs with inter spaces nearly equal to the width of the ribs. 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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