LETTER OF TRANSMITTAL 



To His Excellency EMEKSON C. HARRINGTON, 



Governor of Maryland and President of the Geological Survey Com- 

 mission, 



Sir: I have the honor to present herewith the seventh of a series of 

 reports dealing with the systematic geology and paleontology of Maryland. 

 The preceding reports of this series have dealt with the Devonian, Lower 

 Cretaceous, Upper Cretaceous, Eocene, Miocene, and Plio-Pleistocene 

 deposits and the remains of animal and plant life which they contain. 

 The present volume treats of the Cambrian and Ordovician deposits and 

 their contained life. These rocks comprise the oldest fossiliferous rocks 

 of the state, a knowledge of which is extremely important from a scientific, 

 educational, and economic standpoint. I am, 



Very respectfully, 



EDWARD BENNETT MATHEWS, 



State Geologist. 

 JOHNS HOPKINS UNIVERSITY, 



BALTIMORE, September, 1919. 



