1895.] NATURAL SCIENCES OF I'lIILADEEPIII A. 117 



seen in a well at Mr. K. Jones' house, nearly half a mile north of 

 the Bayou. The section of the well shows : 



1. Yellowish-hrown sandy clay 6 feet 



2. Joint clay 6 feet 



3. Thinlv laminated black fossiliferous sand 4 feet 



4. Bluish green fossiliferous sands 14 feet 



Nos. 3 and 4 hold fossils closely corresponding to those found on 



the Bayou with a few additional species. 



West of Crockett, about two miles, we have Cook's Mountain, an 

 isolated hill rising about 460 feet above sea level and showing a 

 more or less precipitous face on every side. This face, however, is 

 marked by a series of benches and the general section shown on 

 the eastern side, from Milam branch to the top of the mountain, 

 shows : 



1. Brown ferruginous sandstone with occasional casts 



of a small bivalve 10 feet 



2. Yellow-colored crossbedded altered glauconitic sand 40 feet 



3. Brown sand and sandstone with occasional seams 



of ferruginous material 55 feet 



4. Brown ferruginous sandstone coutaiuiug Ostrea sel- 



heformisvar. divaricata Lea, and 0. alabamensis 



Lea in considerable numbers . 10 feet 



5. Iron ore 1 foot 



6. Brown sand containing Bulimella hellogii Gabb., 



Terebra texagyra var. Harris, T. houstonia Har- 

 ris, n. sp., Conus sauridens Con., Plewotoma 

 (Surcula) gabbii Con., PL (Coehlespira) engonata 

 Con., PL (Drillia) nodocarinata Gabb., PI. 

 (Drillia) texana var. pleboides Harris, PI. (Man- 

 gelia ) in fans var., PL sp., Ancilla ( Olivella) stam- 

 inea Con., Ostrea alabamensis Lea, 0. selloz- 

 founts var. divaricata Lea, Anomia ephippioides 

 Gabb., Plieatula filamentosa Con.,Avieula sp. , 

 Pinna sp., Pseudoliva vetusiaCon. var., Volutil- 

 ithes petrosa Con., V. petrosa, var. indenta Con., 

 V- precursor Dall. var., Caricelh subangulata 

 var. cherokeensis Harris, Lapparia paetilis var. 

 mooreana Gabb., Latirus moorei Gabb., Cornu- 

 Una armigera Con., Corbula alabamensis Lea, 



