KiNAHAN — On Canadian Archman, and Pre- Cambrian Bocks. 363 



Some of the suggestions that I have made in this Paper may 

 have been ah-eady published by American Greologists, who have 

 had better opportunities than I have had of studying the rocks. 

 If so, I apologize to them ; but at the same time I would assure 

 them that I am at present unaware of their having made the 

 suggestions. 



NOTE ADDED IN THE PEESS. 



I learn from Dr. George Dawson that, during last summer's work, 

 some important changes, which are shortly to be pubKshed, have been 

 made in the classification of the Labradorians or Norians. 



212 



