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a* ~ GEOLOGICAL SURVEY OF ILLINOIS. , 6 , 



: A. H. WOETHEN, Dikectoe. 



9 



VOLUME II. 



PALEONTOLOGY 



DESCRIPTIONS OF VERTEBRATES. 



BY J. S. NEWBERRY AND A. II. WORTHEN. 



DESCRIPTIONS OF INVERTEBRATES. 



BY F. B. MEEK AND A. H. WORTHEN. 



v DESCRIPTIONS OF PLANTS. 



BY LEO LESQUEREUX. 



^ 





ILLUSTRATED 



BY THE WESTERN ENGRAVING COMPANY. CHICAGO 



PUBLISHED 



BY AUTHORITY OF THE LEGISLATURE OF ILLINOIS. 





1866. 



