BEEDE: UPPER PERMIAN RED BEDS. 141 



discoveries are of especial interest, giving us an idea of the 

 great extent of the Permian sea in America. 



SUMMARY. 



The foregoing has shown the following facts to be ascer- 

 tained to date. Cope, Cummins and White have demon- 

 strated that the Wichita (including the Albany) and Clear 

 Fork beds of Texas are unmistakably Permian. 



Cummins showed, by mention of fossils, that the beds above 

 to within about ' ' 300 feet ' ' of the top of the Red Beds ( below 

 the Dockum beds) of Texas are Permian. This would be 

 to about the horizon of the Whitehorse sandstone of Okla- 

 homa. 



Cragin and Gould have shown on stratigraphic grounds 

 that the gypsum-bearing beds of Kansas, Oklahoma and Texas 

 are, in a general way, equivalent. 



Cummins, Adams and Gould have demonstrated that the 

 light-colored Permian rocks of Kansas and Texas have their 

 equivalents in the red strata of Oklahoma. 



Williston and Case have demonstrated that the lower Enid 

 formation of Oklahoma is Permian and of similar horizon 

 to some parts of the Wichita and Clear Fork divisions of 

 Texas. 



Beede has shown that the beds as high as the Whitehorse 

 sandstone of Oklahoma are Permian. 



Gould has shown that the Whitehorse sandstone is iden- 

 tical with Cragin's Red Bluff formation of Kansas. 



FAUNA OF THB WHITEHORSE AND QUARTERMASTER SANDSTONES. 



In the present paper the fauna of the Quartermaster divi- 

 sion is added to that of the Whitehorse sandstone. As Gould 

 has pointed out, the Quartermaster division is the highest 

 formation in the Red Beds, and the fossils came from well 

 up in this formation. 



The fauna of the Quartermaster beds is different in some 

 respects from that of the Whitehorse sandstone, several new 

 elements having been introduced. The literature at hand 

 is unsatisfactory concerning three species of the gastropods 

 of this formation, notably Naticella. In order that no possi- 

 bility of mistake be made, the types of the whole Quarter- 



