84 



Dr. Haydens does no course say anything about the stratum 

 which is represented by these two, N. 14 and 16, but they are evi- 

 dently from the same stratum. It is a representative of the Occi- 

 dental Sea and I should place it in the Eocene period, before the 

 Miocene. But this is, of course, uncertain and can only be determi- 

 ned by one who visits the localities and makes collections and stu- 

 dies the place himself. At any rate these notes, rapid as they are 

 and incomplete also, lays before the reader the studies of mine maie 

 in Dr. Hayden's Survey of the United States Geological Survey of 

 the Territories. 



■^^6^?^5* 



