Page:Walcott Cambrian Geology and Paleontology I.djvu/29

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SMITHSONIAN MISCELLANEOUS COLLECTIONS
PART OF VOLUME LII


CAMBRIAN
GEOLOGY AND PALEONTOLOGY


No. 2.—CAMBRIAN TRILOBITES

With Six Plates


BY
CHARLES D. WALCOTT


No. 1805


CITY OF WASHINGTON
PUBLISHED BY THE SMITHSONIAN INSTITUTION
April 25, 1908

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