I. C. WHITE — FOSSIL PLANTS FROM THE WICHITA. 4")9 



The reading of papers was declared in order, and the lirsl paper on the 

 printed program was announced, entitled — 



THE MANNINGTON OIL FIELD AND THE HISTORY OF ITS DEVELOPMENT. 



BY I. r. WHITE. 



Remarks were offered by G. K. Gilbert, Arthur Winslow and E. W- 

 Claypole. The paper forms pages 187-216, with plate •', of this volume. 



The second paper was — 



FOSSIL PLANTS FROM THE WICHITA OR PERMIAN FEDS OF TEXAS. 



BY r. C. WHITE. 



In the subsequent discussion remarks in confirmation of the Permian 

 age of the Wichita beds were made by several Fellows. Professor E. W. 

 Claypole observed — 



There is much to be said in favor of an American Permian, though there is con- 

 siderable prejudice against the Permian on the pari of some American geologists. I 

 do not regard the finding of trilobites as an objection. 



Professor Alpheus Hyatt said : 



I have found the cephalopod fauna of the beds described by Professor White 



to he decidedly Permian. 



In reply to a question, the author said the plant fossils of the American 

 Permian were of fresh-water origin. Mr. E. T. Dumble remarked : 



The plants sent to Professor White were taken principally from the Wichita 

 beds, the lowest nf the three divisions into which the Permian formation of Texas 

 has been separated; The Walchia, however, is not confined to this division, but 

 occurs also in the sandstone of the overlying Clear Fork beds. These plants occur 

 in the beds in which are found the invertebrate forms described by Dr. ( '. A. White 

 and which contain such characteristic Permian fossils as Medlicottiu. These Tonus 

 were examined by the Russian geologists at Washington during the meeting of the 

 International Geological Congress, and were pronounced by them identical with 

 the species found in the Permian of thai country. The vertebrate forms described 

 by Professor Cope as I 'em nan were obtained also from the Wichita division. 



The paper is printed on pages 217-218 of (his volume. 



A recess was voted until '_' o'clock. 



