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SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOLUME 57, NUMBER 3
CAMBRIAN
GEOLOGY AND PALEONTOLOGY
II
No. 3.—MIDDLE CAMBRIAN HOLOTHURIANS
AND MEDUSÆ
With Six Plates
BY
CHARLES D. WALCOTT
(Publication 2011)
CITY OF WASHINGTON
PUBLISHED BY THE SMITHSONIAN INSTITUTION
JUNE 13, 1911
