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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