SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 57, NUMBER 5 



CAMBRIAN 

 GEOLOGY AND PALEONTOLOGY 



No. 5.-MIDDLE CAMBRIAN ANNELIDS 



With Six Plates 



BY 

 CHARLES D. WALCOTT 



(PUBLICATIOK 2014) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



SEPTEMBER 4, 1911 



