1902.] DOUGLASS— CRETACEOUS AXD LOWER TERTIARY. 217 



Coulee Creek ; but I have not examined all of this territory. I ex- 

 amined hastily the beds on Sweetgrass Creek east and a little north 

 of Big Timber, where I made a collection of fossil leaves. The 

 remains of a turtle were also found in the shale. 



The portion of the Fort Union described in this paper apparently 

 represents the upper portion of the Crazy Mountain section, as 

 given by Weed in the American Geologist oi October, 1896. 



Fossil plants, Unios and Gasteropods, are abundant and may 

 occur in any part of the beds favorable for their preservation. Last 

 summer (1901) determinable Mammalian remains were found. As 

 is well known, the exact position of these beds has been a matter of 

 some doubt and difference of opinion. They have usually been 

 assigned to the Tertiary, though they have been placed as low as 

 the Cretaceous and as high as the Miocene. 



The bones and teeth of Ma7fi?nals which were found ^ are not 

 numerous, but are sufficient to show that the beds are of nearly the 

 same age as the Torrejon of New Mexico. They are : 



Mioclcenus acolytus (Cope). 



Anisonchus very near to A. sectorius Cope. 



Euprotogonia puercensis (Cope) . 



Pantolambda caviridis (?). 



Pantolatnbda (?), a small species. 



Some others are doubtful. 



I felt very certain that these beds were Fort Union, but to settle 

 the matter forever and leave no room for a shadow of doubt, a box 

 of fossil leaves was sent to Mr. F. H. Knowlton, of the United 

 States Geological Survey. Mr. Knowlton examined them at once 

 and sent me a list, which I quote : 



Pterospermites cupanioides (Newb.) Knowlton. 



Popidus speciosa Ward. 



Populus amblyrhyncha Ward. 



Ulmus orbicularis ? Ward. 

 Vitis xantholitJiensis Ward. 



Populus dapJmozenoides Ward. 



Populus arctica ? Heer. 



Platanus aceroides Gopp. 



Celastrus sp. 



Grewia crenata (Ung.) Heer. 



1 Science, February 14, 1902, pp. 272, 273. 



