C. R. Stauffer — The Minnesota Devonian. 409 



part of North America. A comparison of the Minnesota 

 fauna with that of other northwestern Canadian localities, 

 as mentioned by Whiteaves (10), gives no more encour- 

 aging results. Whiteaves himself says, of his whole list 



PACIFIC 



OCEAN 



Paleogeographic Map of the North American region during late 

 Middle Devonian. 



from the Mackenzie valley, ten species are common to the 

 Iowa (11) Devonian while twenty-two species are found in 

 the Hamilton of Ontario and New York. This is a very 

 significant suggestion as to the relationships of the north- 



