266 
Transactions Texas Academy of Science. 
Wpiite^ Charles A. 
referred to tlie Laramie. iStratlgrapLical geology on the Mexican side of 
the Kio Grande. Uncertainty of the precise position in the geological 
series of the lEooene beds resting upon the Laramie near Laredo. Posi- 
tion of the lignitic beds in Mississippi and Eastern Texas. The “Belly 
River Series” of Dawson, and its relation to the Laramie. The presumpt- 
ive evidence of the ‘Cretaceous age of the Laramie. 
425. 
(On the Fauna of the Permian of Baylor, Archer and Wichita 
Counties, Texas. ) 
Amer. Ratnralist, Yol. XXII, p. 926. 1888. 
“Statement of his opinion in regard to the Permian age of the forma- 
tion.’^ Erom Barton’s Record of N. A. Geol. for 1887, etc., Bull. U. S. 
Geol. S'urv. No. 75, p. 164. 
426. 
On the Permian Formation of Texas. 
Amer. Naturalist, Yol. XXIII, pp. 109-128; pi. 1. Feb., 
1889. 
Cope, from time to time during the past ten years, has published descrip- 
tions of vertebrate remains from Texas which he has referred to the Per- 
mian; other authors have generally referred the formation to the Triassic. 
A collection of invertebrates made by W. F. Cummins proved so interesting 
that the author in company with Mr. Cummins visited the region and made 
collections and observations personally. He says: “Thirty-two species of 
invertebrates were collected, about one-half of which were readily recog- 
nized as well-known Coial-measure species, but a few of them were new, 
among which were two belonging to mesozoic types. It is this paleonto- 
logical feature in connection with important correlated facts, that especi- 
ally excited my interest in the formation from which the fossils were 
obtained. 
* ?t- * * -s- * 
“In Texas this formation oocupies an area many hundred square miles in 
extent, which constitutes the western part of the southern extreniity of the 
great central paleozoic region of the continent. The southern boundary of 
this area is not now definitely known, but it lies at least as far south as the 
Concho river. Its eastern boundary may 'be approximately designated as 
extending from Red river to the Golorado through Clay, Young, Shackle- 
ford, Callahan and Runnels counties; and its wesitern border as extending 
from the Canadian river to the Concho through Hemphill, Wheeler, Don- 
ley, Briseoe, Motley, Dickens, Garza, Borden and Howard counties. The 
formation is known to extend northward far within the Indiian Territory, 
but. in this article special reference is made only to that portion of it 
which is found in Texas; and the description which is herein given is 
drawn nrainly from observations made in Baylor, Archer and other con- 
tiguous counties. 
“This formation rests directly and conformably upon another series of 
