148 
Transactions Texas Academy of Science. 
Hill^ Egbert T. 
newer strata in 'Arkansas, it is directly covered by the uppermost Creta- 
ceous of Hilgard’s Mississippi section.” 
The fauna is littoral. Its characteristic molhiscan species indicate 
upper Jurassic and Wealden. To the continuous formation the name 
“Trinity” is applied. It includes the “Dinosaur Sands” of the Texas sec- 
tion. 
201 . 
'The Neozoic Geology o'f Southwestern Arkansas. 
Annual Eeport of the Geological Survey of Arkans'as for 1888, 
Vol. II. Little Eock, 1888. 
(The T 3 ^pieal Section of the Texas Cretaceous.) Chapter 
XI, pp. 110-115. 
8ee “The Texas Section of the American Cretaceous,” by , Robert T. Hill. 
Amer. Jour, of Sci. ante. 
202 . 
Notes upon the Texas 'Section of the American Cretaceous. 
(Abstract.) 
Proceedings of the Amer. -Assoc. Adv. Science, Yol. XXXVI, 
p. 216. '1888. 
“Owing to its peculiar transiiitional geographic position and the favorable 
eonditions of exposure of its strata, the State of iTexas presents the best 
opportunity for the study of the American Cretaceous, which has there 
the most oomprehensive vertical range.” 
In this brjef paper are pointed out:- (1) That both the Gulf -series 
or Mississippi section of Hilgard, with the exception of the Eutaw foirina- 
tion, and the Rocky Mountain series or Nebraskian section of Meek and 
Hayden, extend into the .State by direct stratigraphic continuity. (2) 
That .Roeiner, Shumard and others had fallen into some stratigraphical 
errors; and (3), that beneath the Dakota sandstone of the Hayden sec- 
tion, as previously mentioned in a paper before the Philosophical Society 
of Washington, January 29, 1887, there exists an older anarine group of 
sediments with a fauna greatly resembling that of the iHeoeomian or Lower 
Cretaceous of Europe. 
203. — 
The Geology of 'Texas. 
Texas School Journal, Vol. VI, N. S. 143-145. Austin, June, 
1888. 
The true meaning of Geology, What is geologically known of Texas. 
( 1 ) There is no good geo-graphie map of the 'State, except for a few 
square degrees in the center recently surveyed by the U. S. Geological 
Survey.- (2) The stratigraphy of the 'State has never been mapped and 
published^ (3) There is little definite knowledge published concerning 
