MONOGRAPH 



TRILOBITES OF NORTH AMERICA 



(Eoiouutr JHotrels of tHe 



Multa rcnascentur que jam cccidere. Hon. 



JACOB GREEN, M. D. 



Profjssor of Chemistry in Jefferson Medical College. 



PHILADELPHIA: 



PUBLISHED BY JOSEPH BRAND, No. 12, CASTLE STREET. 

 Clark & Raser, Printers. 



1832. 



