;\-»' 



/i 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 75 



CAMBRIAN 

 GEOLOGY AND PALEONTOLOGY 



V 



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 2976) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



1928 



