202 KNOWLTON 



This section, it will be observed, is strikingly similar to that at 

 Glendive, Montana, and it is extremely probable, as already pointed 

 out, that it is the same anticlinal fold which brings up the marine 

 Cretaceous in both areas. From the shales and sandstones indicated 

 as carrying leaves in the above section, the following species were 

 obtained: 



Taxodium occidentale Newb. 

 Popidns amllyrhyncha Ward. 

 Pla anus haydenii Newb. 

 Juglans riigosa? Lesq. 

 Hicoria anliqitorum (Newb.) Kn. 

 Sapindus affinis Newb. 

 Viburmtm wliyniperi Heer. 

 Trapa micropliylla Lesq. of Ward. 

 Cocculus Juiydenianus Ward. 



Professor Leonard has sent specimens of the dinosaur obtained 

 from near Yule to the United States National Museum, and it has 

 been identified by Mr. Gilmore as Triceratops horridus (Marsh), 

 this species being the type of the genus. 



12. PROBABLE AREA OF LOWER FORT UNION IN NORTHWESTERN 



SOUTH DAKOTA. 



The exact outline of the area covered by the lower member of the 

 Fort Union in southwestern North Dakota is not at present definitely 

 known, nor has its extension to the southward been thoroughly 

 traced, though I am informed by Mr. J. W. Gidley that he has ob- 

 served dinosaur-bearing beds that are stratigraphically and litho- 

 logically similar to the "Ceratops beds" of Converse County, W^yo- 

 ming, in the country between the Grand and Moreau rivers in South 

 Dakota, on both the east and west sides of Long Pine Hills. From 

 these beds near the eastern base of Long Pine Hills remains of gigan- 

 tic Trachodont dinosaurs have been exhumed. 



Since the above was written Mr. W. R. Cahert has sent in (under 

 date of May 2, 1909) the following collection from McCor^l coal 

 bank in N. W.i, Sec. 5, T. 129 N., R. 88 W., on the north side of the 

 Cannonball River in the Standin" Rock Indian Rescr\ation. The 



