24 
Transactions Texas Academy of Science. 
American Naturalist. 
Formation, Proc. Am. Assoc, for the Adv. of Sci., Vol. XXXVdll, p. 243; 
'Classification and Origin of the Chief Ceographic Features of the Texas 
'Region, Aon. iGreoL, Vol. V, pp. ff-29.) Reference is also made to Dr. Otto 
Lerch (A G-eological iSurvey of 'tlie Concho Country, Texas, with Cum- 
mins, W. F., Amer. Ceol., Vol. V., pp. 321-335), and to Prof. E. D. Cope 
(On the Distribution of the Loup Fork Formation in New Mexico, Proc. 
Amer. Phil. Soc., 1883, p. 308). 
Occurrence of Texas Lignite 
(General Note.) 
Amer. Naturalist, Vol. XXV, p. 737, Aug., 1891. 
A paragraph, very sliglitly modified, taken from Lerch (‘‘Lignites and 
their Utilization, with sipecial reference to Texas Brown Coal,” Second 
Ann. Rep. of the Geol. iSurv. of Texas, pp. 52-53. 1891). 
The Iron Ore District of East Texas. 
Vo]. XXV, pp. 910-911, Oct., 1891. 
A general note referring to the account of this region given by Mr. 
E. T. Dumble, State Geologist, in the 'Second Annual Report of the Geo- 
logical iSurvey of Texas, 1890, pp. 7-31. 
Fresh-Water Diatomaceous Deposit from Staked Plains, Texas. 
(General Note;) 
Vol. XXVI, pp. 505-506. June, 1892. 
“Some nearly white earth, very light in weight, from Crosby County, 
Texas, and within the 'Staked Plains region was submitted by Prof. E. D. 
Cope to the first of the undersigned authors for examination. [Mr. 
Woolman.] 
“In a contribution to the ‘Vertebrate Paleontology of Texas,’ p. 123 of 
the Proceedings of the American Philosophical Sooidty [Vol. XXX], Prof. 
Cope states that this material iis from the Blanco Canon beds as named 
by Mr. Cummins in the first annual report of the Geological Survey of 
Texas, 1890, p. 190, and describes it as a ‘white .siliceous friable chalk.’ 
“Under the microscope this earth is found to be constituted almost 
entirely of the siliceous skeletal remains of fresh-water diatoms, proba- 
bly 90 per cent, of the body of the earth being made up of these minute 
single celled forms of plant life.” * * 
Mr. C. Henry Kain reports: “This is a fresh-water fossil deposit. The 
species contained in it may now be found living in Utah and in the Yellow- 
stone National Park. Many of the species are also common to fresh water 
streams everywhere.” 
A list of twenty-seven identified species follows, signed by Lewis Wool- 
man and C. Henry Klain. 
‘Tn the paper previously referred to. Prof. Cope notes the occurrence 
in this diatomaceous stratum of a ‘Mastodon of the angustidens type,’ 
