Douglass: Nkrikhkai ks from Montana Tkrtiakv. 153 



maliix of ilic Deep River Beds. During the last summer this formation 

 was identified at Canon Ferry on the Missouri River about twenty 

 miles east of Helena. Here many skulls of Promerycochoerus, Cyclo- 

 pidius, Merychyiis and other Oreodonts were obtained. 



What are evidently the same beds were found on the North Boulder 

 opposite Cold Spring Postofifice. The fragments of fossils seen ap- 

 peared to be the same as those obtained at Canon Ferry ; but they 

 were found during a reconnaissance on horseback and not collected 

 by the writer. The character of the beds is nearly identical. 



The Flint Creek Beds. 



These have not been visited by the writer since 1899.^ Several 

 fossil mammals \vere found ; but, with one or two exceptions, they 

 cannot be identified with species found in other places. These ex- 

 ceptions are portions of four skulls of (<r) Pa/ceoineryx, one of which 

 is nearly complete with one side of the mandible. There may be two 

 species, but one is undoubtedly Palccomeryx borealis (Cope), {b) 

 Mylagaidus paniensis is identified by the premolar tooth only, which 

 does not differ from that of the type. The following is a list of the 

 species : 



Ogmophis arenantm Douglass. 



Talpa ? platybrachys Douglass. 



Scitirus. 



Mylagaidus paniensis Matthew. 



ySlurodon ? brachygnatJuis Douglass. 



Protohippus ? 



Hesperhys vagrans Douglass. 



Merychyus sinithi Douglass. 



PoatrepJies paludieola Douglass. 



]\Ieyyeocha'rus laticeps Douglass. 



Procamelits. 



Palceomeryx borealis ' ( Cope ) . 



These were all found near the village of New Chicago in Granite 

 County. 



The typical exposure forms a line of bluffs 100 to 150 or more feet 



^Set Am. Jonrn. .Sc, Vol. lo, Dec, 1900, p. 428. 



^There is some doubt that this is Pahcoineryx, but I see no conclusive evidence 

 that it is not ; so, until the matter can be settled, it is best to include the American 

 specimens with the European genus. 



