CONTENTS. 



Page. 



Introduction 61 



Character and extent of the Calvert formation 61 



Fauna of the Calvert formation 62 



Flora of the Calvert formation 62 



Composition and enwonment 62 



Probable age 66 



Conclusions 66 



New species of plants 66 



ILLUSTRATIONS. 



Plates XI. XII. Fossil plants from the Calvert formation 72-73 



II 



