1895.] NATURAL SCIENCES OF PHILADELPHIA. 125 



in No. 4 AncUla aneillops Heilpr., Bysso- 

 arca cuculloides Con., Pseudoliva vetusta 

 var. fusiformis Lea, Volutilithes precursor 

 Dall., Cornulina armigera Con., Corbula 

 aldrichi, var. smithvillensis Harris, C. tex- 

 ana Gabb, Dentalium minuti striatum Gabb, 

 Fusus mortoni, var. mortonopsis Gabb, 

 rhos texana Gabb, Distortio septe indent lata 

 Gabb, Solarium scrobiculatum Con., S. 

 (nullum, var. ineekanum Gabb, Pyrula 

 (Fusofictda) texana Aid., Mesalia claiborn- 

 ensis Con., Tarritella nasuta Gabb- 49 . . 1 foot. 



6. Laminated fossiliferous blue clay 10 feet. 



7. Alternate strata of yellowish sand and blue 



clay, clay 6 inches and sand from 4 to 8 



inches thick 4 " 



8. Brown sand • 1£ " 



The connection between these beds will be readily understood 

 when it is stated that at least 30 of the 38 species found at Camp- 

 bell's Creek are common to Wheelock and the exact stratigraphic 

 position of the two sections can be seen in a section on the Town 

 branch, south of the town of Wheelock and intermediate between 

 the Cedar Creek and Campbell's Creek sections. Out of some 36 

 species obtained 19 are common to Campbell's Creek, 26 to Cedar 

 Creek and the following 10 do not occur at either: Pleurotoma 

 ( Drillia') texana Gabb, PL (Drillia) pleboides Harris, PL {Mange- 1 

 I in) infans var. Mr., PL (Scobinella) erassiplicata Gabb, Turricula 

 (Conomitra) texana Harris, Terebra amazna Con., Periploma col- 

 lardi Harris n. sp., Clavilithes humerosa, var. texana, Harris, 

 Clavilithes (Papillina) dumosa, var. trapaquara Harris, and Cari- 

 cella subangulata, var. cherokeensis Harris. 50 

 The section shown at this place is : 



1. Black surface soil 1 to 3 feet. 



2. Dark-brown gypseous clay, base of the 



Yegua stage li " 



3. Brown fossiliferous sandstone and brown clay 



49 Harris Mss. 50 Harris Mss. 



