212 R. T. Hill—Outlying Areas of the Comanche 
Beds and the Cretaceous—the other between the Cretaceous 
and the overlying Tertiary. 
Owing to the great erosion which took place between the 
close of the Cretaceous and the deposition of the plains Ter- 
tiary (Miocene and later), any or all of the Cretaceous may be 
missing in some localities as between the Canadian and Brazos ; 
while south of the head of the Brazos the plains Tertiary rests 
on the limestones of the Fredericksburg and Trinity divisions 
of the Comanche series instead of the beds of the Washita 
division to the northward. 
Paleontology: The fossil mollusca was submitted to Mr. T. 
W. Stanton of the United States Geological Survey, and the 
fossil plants to Prof. F. H. Knowlton, for determination and 
study. Their reports are included in the following discussion. 
The Cheyenne Sandstone.—Prof. Oragin, as before noted, 
reported the occurrence of one species of a plant from these 
beds. This he described as Cycadoidea munita.* It can be 
stated that later information concerning the specimens in ques- 
tion, throws doubt as to its occurrence in this identical horizon. 
In the lowest sandstone No. 1, only plant stems and small 
pieces of lignite were found. A well defined flora was found 
in the sandy shale (No. 2} and the layers (8, 4) immediately 
overlying the main basal sandstone, and which are genetically 
related to No. 1, marking the cessation of the initiatory sandy 
beds of the series; two large boxes of these specimens were 
collected at Black Hills and submitted to Professor Knowlton, 
whose appended report speaks for itself. Similar plant remains 
were observed in the same sand layer near Blue Cut Mound, 
but night coming on a detailed collection could not be made 
there. 
Report upon a Small Collection of Fossil Plants from Black 
fills, near Belvidere, Kansas, collected by Prof. R. T. Hill 
in August, 1894. | 
This material has been carefully examined and the following 
species identified : 
Rhus Uddeni Lx. 
Sterculia Snowii Lx. 
Sassafras Mudgei Lx. 
Sassafras cretaceum Newby., var. obtusum Lx. 
Sassafras, n. sp. 
Glyptostrobus gracillinus Lx. 
Sequoia sp. 
_ The above species have, according to Lesquereux, the follow- 
ing distribution : 
* Bull. Washburn Laboratory, vol. ii, No. 10, p. 65. 
