526 



A. G. LEONARD 



mation as in the Fort Union, 

 rare. The following species 

 of the Lance beds near Yule 



Taxodium occidentale NeWb. 

 Populus amblyrhyncha Ward. 

 Platanus Haydenii Newb. 

 Juglans rugosa ? Lesq. 

 Hicoria antiquora (Newb.) Kn. 



and in most localities they are quite 



were collected in the upper portion 

 i 



Sapindus affinis Newb. 

 Viburnum Whymperi Heer. 

 Trapa microphylla Lesq. of Ward. 

 Cocculus Haydenianus Ward. 



Fig. 6. — The eroded surface of the Fox Hills sandstone overlain by dark, car- 

 bonaceous beds of the Lance formation. Little Beaver Creek, Bowman County, 

 North Dakota. 



According to Dr. Knowlton, these plants belong without ques- 

 tion to a Fort Union flora. Near the mouth of Bacon Creek in 

 the lower part of the Lance formation and associated with the 

 dinosaur bones, a Ficus fruit was found. The same species is 

 present in the beds on Hell Creek and at Forsyth, Montana. 



Five miles southwest of Yule, in section 16, T. 135 N., R. 105 W., 

 an oyster bed was found in the summer of 1907. It was about 

 180 feet above river level or some 500 feet above the base of the 

 formation and most of the shells were near the middle of a layer 

 of brown carbonaceous shale seven feet thick, with a coal bed 



1 Identified by Dr. F. H. Knowlton. 



