118 KANSAS UNIVERSITY SCIENCE BULLETIN. 



"Dr. William De Ryee, formerly state chemist, visited 

 Archer county in 1868, in the interests of the Texas Copper 

 Mining and Manufacturing Company. In a report made to 

 that company, and published by them, he says : 'After 

 traversing the Lyas and Carboniferous series northward of 

 Weatherford, I was agreeably surprised by a grand panorama 

 of the outcropping of the Permian formation. This system 

 is extensively developed in Russia between the Ural moun- 

 tains and the river Volga, in the north of England, and in 

 Germany, where it is mined for its treasures of copper, silver, 

 nickel and cobalt ores. It has not heretofore been known 

 to exist in this state, or has been mistaken for the Triassic 

 system, which is overlying the former to the northwest.' 



"Prof. Jacob Boll, formerly of Dallas, Tex., in an article 

 entitled 'Geological Examinations in Texas,' published in 

 the American Naturalist, vol. XIV, pp. 684-686, September, 

 1880, says that these beds of Texas are undoubtedly Permian. 



"Prof. G. C. Broadhead, who visited Colorado City, refers 

 the beds in the vicinity of that place to the Permian."" 



Professor Boll's statement quoted above probably has its 

 foundation in the collecting and exploring which he did for 

 Professor Cope, and who secured some of the material de- 

 scribed by Cope and listed below. 



Cope was the first to refer the Red Beds to the Permian, 

 using fossils as evidence of their age. In 1878 he published 

 an article stating that ' ' the discovery of a species of the genus 

 Clepsydrops in Texas, in a formation hitherto regarded as 

 Triassic, adds weight to the view above expressed, that the 

 Clepsydrops shales of Illinois belong either to the Triassic or to 

 the Permian formation."** In the same year, under the title 

 "Descriptions of Extinct Batrachia from the Permian Forma- 

 tion of Texas," he describes the following species:^ Diadectes 

 sideropelicas, D. latih>tccatus, Bolosaiirus striatus, Chilonyx (Bo- 

 losa<i.rus) rapidens, Pariotichus b^achyops, Parlotichus (Ectocyno- 

 don) ordinatufi, Clepsydrops natalis, Dimetrodon incisivus, D. 

 rectiformis, D. gigas, Eryopa (Epicordylus) erythroliticux, Mda- 



7. Taken from Geol. Surv. Tex., 2d Ann. Hep., pp. 399, 400. 



8. Proc. Amer. Phil. Soc, XVII, p. 193. 



9. Ibid., pp. 505-530. Lists revised after Hay. 



