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SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 57 



CAMBRIAN 

 GEOLOGY AND PALEONTOLOGY 



II 



BY 

 CHARLES D. WALCOTT 



'EVERT MAN IS A VALUABLE MEMBER OF SOCIETY WHO, BY HIS OBSERVATIONS, RESEARCHES, 

 AND EXPERIMENTS, PROCURES KNOWLEDGE FOR MEN" — SMITHSON 



(Publication 2270) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



1914 



