244 ^- C. CASE 



wherever the Enid occurs. The lack of exposure and the abundant 

 vegetation make their discovery a matter of great difficulty. In 

 Texas, fossils occur in Wichita, Archer, Baylor, and Willbarger 

 counties, and a few fragments of bone have been reported by 

 Cummins as far south as the southern line of Haskell County, 

 all in the Wichita and Clear Fork formations. 



The Texas beds have yielded by far the greater number of 

 vertebrate fossils and are regarded as the type locality; the rela- 

 tion of these beds to those of Oklahoma and New Mexico is still 

 uncertain. On the east the Texas beds shade into the Cisco Lime- 

 stone as shown by Cummins and Gordon and on the west they 

 disappear beneath the Dockum beds of Triassic age, on the eastern 

 edge of the Staked Plains. On the western side of the Staked 

 Plains Red Beds again appear and can be traced nearly to the 

 edge of the Rocky Mountains, but for some distance east of the 

 mountains they are covered, in the latitude of Las Vegas, by 

 Cretaceous. 



In attempting to answer the first question mentioned above, it 

 was necessary to trace the Red Beds from their easternmost appear- 

 ance to the edge of the mountains. The route followed was west 

 from Wichita Falls through Seymour, in Baylor County, Haskell, 

 Haskell County, Spur, Dickens County, Crosbyton, Crosby County, 

 north through Floyd, Motley, and Briscoe counties to Clarendon, 

 and then approximately along the line of the Fort Worth & Denver 

 City Railroad to Amarillo and along the Chicago, Rock 

 Island & Gulf Railroad to Tucumcari and Montoya. At Mon- 

 toya the party left the railroad and headed for Las Vegas along the 

 foot of the high mesa to the head of the Conchas River and then 

 over the mesa to Las Vegas Hot Springs. The return route was 

 across northeastern New Mexico to Clayton and then through the 

 No Man's Land of Oklahoma to Alva where the party broke up. 



Near Wichita Falls the surface rocks belong to the Wichita and 

 Clear Fork formations already described in more or less detail by 

 Cummins, Case, and Gordon.^ On the east the Wichita beds 

 shade into the Pennsylvanian Kmestone just as the Enid does to 



' Cummins, Second Annual Report, Geological Survey of Texas; Case, Bull. Ameri- 

 can Museum Natural History, XXIII; Gordon, Jour. GeoL, XIX. 



