196 
Transactions Texas Academy of Science. 
Marcou, Jules. 
liRed river/ the fossil Gryphaea Pitcheri, now siceepted as the most charac- 
teristic fossil of the typical Texas 'Cretaceous. This locality, we can only 
surmise, was the same as that now called the Staked Plains (Llano Esta- 
cado) region of Texas, The specimens were colleeted by army officers.” 
Morton’s statement of the manner in which he received the fossil from 
Dr. Pitcher, ‘Vho obtained it from the plain of Kiameshia, in Arkansas.” 
Letter from Dr. Z. Pitcher, dated Detroit, October 12, 1859. Extract: 
“The Kiamechia is a small stream which empties into the Red river a few 
miles above Fort Towson. My little fossil which has acquired so much 
consequence from the discussions into which it has been drawn by scientific 
names, was picked up on the plains drained by this little rivulet, through 
which our troops were marking out a road from Fort Smith to Fort Tow- 
son, in 1833. 
“In 1853,” the author (Marcou) “came upon that Gryphaea pitcheri, not 
far west from its original area, at Fort Washita, and farther west up the 
Washita rivei\ * * I saw it also, a few miles north on the banks 
of the Canadian river, at the great bend of that river.” Dr. Newberry’s 
mention of G. pitcheri in the Report of the Ives Expedition, 1861, and later 
in the Report of the Macomb Expedition, 1876^ The author disputes New- 
berry’s determination of the fossil and its associations. Quotation from 
Circular No. 1, '-School of Geology, University of Texas: “The reaffirmation 
of the age of the Tucumcari section along the northwest corner of Texas 
to (be uppermost Jurassic as originally described by IMarcou,” ( written by 
Professor Hill ) . 
This is one of the controversial papers concerning the existence of Juras- 
sic rocks in Texas and the part played by G. pitcheri. 
297. 
Jura, ^Teoeoiuian and Chalk of Arkans'as. 
American Geologist, Yo'l. IV, pp. 357-367. Minnoapolis, Dec., 
1889. 
A review of the Annual Report of the Geological Survey of Arkansas, 
Vol. II, 1888, entitled “The Neozoic Geology of Southwestern Arkansas,” 
by Robert T. Hill, in which there are several references to Texas on account 
of the typical occurrence of Cretaceous rocks in that State. 
298. 
The American ISTeocomian and Gryphaea Pitcheri. 
Correspondence. 
Amer. Geologist, Vol. V, pp. 315-317. Minneapolis, May, 
1890. 
A criticism of Professor Hill’s “Preliminary Annotated Check List of the 
Cretaceous Invertebrate Fossils of Texas.” Bulletin No. 4 of the Geologi- 
cal 'Survey of Texas. 
On the Classification of the Dyas, Trias and Jura in Northwest 
Texas. 
299 . 
