1895.] NATURAL SCIENCES OF PHILADELPHIA. 97 



Corrigan the section of a cutting on the Houston, East and West 

 Texas Railway shows: 20 



1. Gray sand 3 feet. 



2. Light gray sandstone containing casts of Corbula 



atabamensis Lea, Dentalium, minutistriatum 

 Gabb, var. dumbli, new var. , Venericardia 

 planicosta Lam., Cytherea tornadonis Harris, 

 and Calyptrophorus velatus Con. 21 . . . . lj to 2 " 



3. Durated gray sand or soft sandstone 4 " 



The Brazos County section containing fossils occurs at Dr. 

 Williams' quarry about three miles east of Wellborn Station, on the 

 Houston and Texas Central Railway. This section shows: 22 



1 . Gray sands 2 to 8 feet. 



2. Thinly laminated, light gray sandy clays ... 2 to 8 " 



3. Broken sandstone with fossil casts 2 " 



4. Regular and even bedded sandstone 6 " 



^»* 



Nos. 3 and 4 of this section contain Bulimella kellogii; Pleuro- 

 toma sp. ; Caneellaria penrosii n. sp., Harris; Yoldia claibomensis 

 Conrad; Mactra sp. ; Corbula alabamensis Lea; Siliqiia simondsi n. 

 sp., Harris; Venericardia planicosta Lam.; Cytherea bastropensis 

 Harris, and Turritella sp. 23 



West of the Brazos River invertebrate fossils have been found in 

 these beds, and from this it may be inferred that the same conditions 

 hold good across the State. 



The area occupied by the Fayette beds forms a narrow belt with 

 extremely irregular and as yet badly defined boundaries extending 

 from the bottom lands along the west side of the Sabine, westward 

 to and beyond the Brazos, and while the greatest width of this belt 

 may exceed fifteen miles, yet throughout its greater extent the 

 average width is not over six to eight milee. Their southern mar- 

 gins dip beneath the overlying Frio clays and their northern 

 borders rest upon the gypseous lignite- bearing clays and sands of the 

 Yegua stage. The country underlaid by these sandstones and sands, 

 particularly throughout the eastern portion of the territory in Jasper, 



20 Third Annual Report Geol. Survey of Texas, 1891, p. 115. 

 n Fourth Annual Eeport Geol. Survey of Texas, 1892, p. 46. 

 53 Harris M.S., Monograph of Texas Tertiary Fossils. 

 23 Harris M.S., Monograph of Texas Tertiary fossils. 



