t* 



Su 



^i 



'^^it^y.c-t 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 53 



CAMBRIAN 

 GEOLOGY AND PALEONTOLOGY 



I 



BY 

 CHARLES D. WALCOTT 



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

 AND EXPERIMENTS, PROCURES KNOWLEDGE FOR MEn" — SMITHSON 



( Publication 1949' 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



1910 



