SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 53, NUMBER 6 



CAMBRIAN 

 GEOLOGY AND PALEONTOLOGY 



No. 6.-0LENELLUS AND OTHER GENERA OF 

 THE MESONACID/E 



With Twenty-Two Plates 



CHARLES D. WALCOTT 



(Publication 1934) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



AUGUST 12, 1910 



