LIST OF PLATES. 



The plates accompanying this volume were engraved and printed by Julius 

 BiEN, of New York. The original drawings for Part I were executed by IT. W. 

 Elliott, of Washington ; those of Part II, by H. M. Maetin, of Albany. 



PA.IIT I. 



Plate I Silurian and Devonian species. 



II Devonian species. 



Ill Devonian and Carboniferous (■?) species. 



IV Carboniferous species. 



V Carboniferous species. 



VI Carboniferous SPECIES. 



VII Carboniferous species. 



VIII Carboniferous species. 



IX Carbojjiferous species. 



X Triassic species. 



XI TiriAssic species. 



XII Jurassic and Carboniferous species. 



XIII Cretaceous species. 



XIV Cretaceous species. 



XV Cretaceous species. 



XVI Cee'iaceous and Tertiary species. 



XVII Cretaceous and Tertiary species. 



P^RT II. 



I Primordial and Silurian species. 



II Primordial and Silurian species. 



Ill Devonian species. 



IV Waverly species. 



V Lower Carboniferous species. 



VI Upper Carboniferous and Triassic. 



VII JURASSK! species. 



IX-X 



*3 



