SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 103. NUMBER 5 



NEW UPPER CAMBRIAN TRILOBITES 



(With 21 Plates) 



BY 

 CHARLES E. RESSER 



Curator, Division of Invertebrate Paleontology and Paleobotany 

 U. S. National Museum 



(Publication 3693) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



OCTOBER 21, 1942 



