SMITHSONIAN MISCELLANEOUS COLLECTIONS 

 VOLUME 128, NUMBER 7 



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LOWER CAMBRIAN PTYCHOPARIID 

 TRILOBITES FROM THE CON- 

 GLOMERATES OF QUEBEC 



(With 6 Plates) 



By 



FRANCO RASETTI 



The Johns Hopkins University 

 Baltimore, Md. 



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(Publication 4216) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



AUGUST 11, 1955 



