THE CENOZOIC DEPOSITS OF TEXAS. 559 



Loup Fork beds and the Blanco or Pliocene, but they are 

 directly connected by a deposit which has been called the Good- 

 night beds. The fauna, according to Professor Cope, contains 

 forms which are found in the underlying Loup Fork, and others 

 which extend upward into the overlying Blanco, as well as three 

 which are peculiar to itself — Protohippus lenticulaHs Cope, Hip- 

 pidium interpolation Cope, and Equns eurystylus Cope. It is pos- 

 sible that more detailed investigations of the upper portion of 

 the Oakville beds above Lapara creek, and between Brenham 

 and Long Point, may furnish evidence of a similar condition. 



PLIOCENE. 



The Blanco beds — Pliocene of the Llano Estacado are 

 composed of clays and sands interbedded with diatoma- 

 ceous earth and capped with calcareous sandstone and lime- 

 stone. They constitute the eastern scarp of the Plains from the 

 Double Mountain Fork of the Brazos river on the south, to Palo 

 Duro Canyon on the north, resting directly on the red clays of 

 the Triassic. 



The vertebrate fauna of these beds is described in the Fourth 

 Annual Report of the Texas Survey, Pt. ii, pp. 47—74. 



The species are : Testudo turgida Cope, T. pertenuis Cope, 

 Crecoides osbornii Schuf., Mcgalonyx leptostomus Cope, Canimartes 

 cumminsii Cope, Borophagus diversidens Cope, Felts lull anus Cope, 

 Tetrabelodon shepardii Leidy, Dibelodon humboldtii Cuv.,D. tropicus 

 Cope, D. precursor Cope, Equus simplicidens Cope, E. cumminsii 

 Cope, E. minutus Cope, Platygonus bicalcaratus Cope, Pliauchenia 

 spatula Cope. 



On the Coastal Slope the beds are grits and clays overlaid 

 by light colored clays, gravel, and tufaceous limestone. In this 

 area I have suggested the following divisions : Lapara, Lagarto, 

 and Reynosa-Orange sand. 1 



The Lapara division, as shown on Lapara creek and on Hog 



1 McGee, in the Twelfth Annual Report of the U. S. Geological Survey, has cor- 

 related the Reynosa and Orange sand with his Lafayette formation ; but I retain the 

 names originally given to these beds for purposes of description, and their precise 

 relations to the Lafayette formation can be determined later. 



