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SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOLUME 57, NUMBER 5
CAMBRIAN
GEOLOGY AND PALEONTOLOGY
II
No. 5.—MIDDLE CAMBRIAN ANNELIDS
With Six Plates
BY
CHARLES D. WALCOTT
(Publication 2014)
CITY OF WASHINGTON
PUBLISHED BY THE SMITHSONIAN INSTITUTION
SEPTEMBER 4, 1911
