SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 95. NUMBER 22 



THIRD CONTRIBUTION 



TO NOMENCLATURE OF CAMBRIAN 



TRILOBITES 



BY 

 CHARLES ELMER RESSER 



Curator, Division of Invertebrate Paleontology, 

 U. S. National Museum 



(Publication 3408) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



APRIL 5, 1937 



