EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA \ ~J 



Added to the features we have indicated, are some definite relationships 

 to the calcareous Oriskany of the Appalachian province. It is important 

 to notice also the very strong affinity of the pelecypod element of the Dal- 

 housie fauna with that of the Coblentzian, a characteristic which knits the 

 fauna in a measure to that of the arenaceous fauna of the Chapman Plan- 

 tation of Maine, elsewhere considered, and demonstrates the effect of trans- 

 atlantic influences on the region under consideration. 



We infer, therefore, that the Dalhousie fauna is essentially Helderberg- 

 ian in its constitution but modified by coming within the influence of 

 transatlantic immigrants, though the latter effect is less evident than in the 

 faunas of the more southerly embayment represented by the Moose river 

 beds of northeastern Maine. 



