LIST OF TLATES. 



P'^RT I 



Plate I. — Primordial period. 

 II.- — Priniordial period. 

 III. — Canadian period. 

 IV. — Trenton period. 

 v. — Snbcarboniferons period. 

 VI. — Carboniferous period. 

 VII. — Carboniferous period. 

 VIII. — Carboniferous period. 

 IX. — Carboniferous period. 

 X. — Carboniferous period. 

 XI. — Carboniferous jjeriod. 



Plate XII. — Carboniferous period. 

 XIII. — Jurassic period. 

 XIV. — Cretaceous period. 

 XV. — Cretaceous period. 

 XVI. — Cretaceous period. 

 XVII. — Cretaceous period. 

 XVIII. — Cretaceous period. 

 XIX. — Cretaceous period. 

 XX. — Cretaceous period. 

 XXI. — Tertiary and Tertiary' 



