382 THE JOURNAL OF GEOLOGY. 



examples have designedly been confined almost exclusively to 

 North America, and while additional ones might have been given 

 within this area, but more particularly in other countries, enough 

 has been presented to indicate that paleobotany may be relied 

 upon to supply a series of stratigraphic marks in every way as 

 reliable for the cases they cover as those supplied by any of 

 the other branches of paleontology. 



F. H Knowlton. 



