A: 
SUPPLEMENT 
MONOGRAPH 
‘TRILOBITES OF NORTH AMERICA: 
WITH 
Coloured MAovels of the Spectes. 
BY 
_ JACOB GREEN, M. D., 
Professor of Chemistry in Jefferson Medical College. 
PHILADELPHIA: 
Pusuissep py Josern Brano, No. 12, CastLe Srreer. 
W. P, Gibbons, Printer. 
1835. 
*, 
