46 
Transactions Texas Academy op Science. 
52. Cope, Edward D. 
Observations on the Greology of A-djacent Parts of Oklahoma and 
Northwest Texas. 
Proe. Acad, of Nat. Sciences, Phila., Pt. I, pp. 63-68. Jan.- 
Apr., 1894. 
An account of an expedition in the interest of vertebrate paleontology 
made during the summer of 1893. List of contributors to the expedition 
fund. iThe month of July and thirteen days nf August occupied in explora- 
tions in the 'Standing iRock and Lheyenne River Sioux Reservations in 
North and South Dakota. Fossils obtained and localities visited. 
Investigation of the Upper Permian Bad Lands of the 'Cimarron in 
Oldahoma. 'The Cretaceous age of the formation which constitutes the 
higher levels at the heads of the canyons tributary to the Cimarron. List 
of Mollusks determined by Prof. Brown. Vertebrate remains. 
‘T have never found Lepidotid fish remains in the Upper Cretaceous of 
North America, while they are characteristically Lower Cretaceous and 
Jurassic in Europe. The only occurrence of Lepidotid fishes so far rec- 
ognized in North America is based on some teeth sent by Mr. Charles H. 
'Sternberg in the Dakota sandstone of Kansas, and on the new species, 
Macrepistius arenatus, from the Trinity bed of Texas discovered by Prof. 
R. T. Hill. (See Journal of the Academy, Vol. IX, Part 4.)” P. 65. 
Rocks corresponding (according to Brown) with the Comanche Peak 
terrane of the Texas geologists. 
The Permian Red Beds. Remnant of the Loup Fork or the Upper 
Miocene. 
‘^Wit'h the view of further determining the extent of the Comanche and 
Loup Fork formations, we left Fort Supply and went by rail to Miami, 
which is a village in Ro'berts county, of the Panhandle of Texas, south 
of the Canadian river. For iseveral miles before reaching Miami, the 
railroad runs between steep bluffs, which form the southern border of 
the flood plains of the Canadian river, and are the escarpments of the out- 
lying tracts and fingers of the Staked Plains. They are a'bout two hun- 
dred feet in elevation, and include two hard strata, while the great mass is 
sandy clay, or sand in a few localities. One of the indurated beds is at the 
■summit of the blufi's, forming the surface of the plain, and is about six feet 
in thickness. The softer argillaceous bed below it varies from fifteen to 
fiity feet, when the second impure sandstone is reached, which has a thick- 
ness of about eight feet. The one hundred and fifty feet below this is 
friable, so that the construction of the escarpment is such as to keep it 
more or less perpendicular. The general appearance of the bluffs is 
closely similar to that of the Blanco beds at the typical locality one hun- 
dred and fifty miles south, at the point where the Brazos river issues 
from the iStaked Plains in the Blanco Canyon. In order to ascertain 
whether this formation is the Blanco or the Loup Fork, which it resembles, 
we examined the bluffs for a day and a half for fossils. 'They are rare 
in that region, but I obtained, on the second day, teeth of both series of 
a horse, Equus cumminsii Cope, whieh demonstrated at once that the 
age is the Blanco. Mr. Brown found ^ camel bones which approach in 
