120 PROCEEDINGS OF THE ACADEMY OF [1895. 



5 and containing same fossils with addition of 

 Pleurotoma heilpriniana Harris, n. sp. , Ostrea 

 sellosformis, var. divaricata Lea, Pinna, sp. , 

 Byssoarea cuculloides Con., Lapparia pactilis, 

 var. mooreana Gabb, Venerieardia planicosta 

 Lam., Cra&satella texana Harris, Cytherea texa- 

 cola Harris, Clavilithes (PapUliuu) dumosa, var. 

 trapaquara Harris, Natica sp., Tnrritella nasuta, 

 var. hoiidoniit, Harris, Belosepia ungula Gabb, 



Euphyla trapaquara Harris. 40 4 feet. 



Going north from here the next bluff is known as Brookiield's 



Bluff, six miles north of Alabama. No fossils were obtained here 



and the bluff presents a section of: 



1. Sand and gravel 20 feet. 



2. Brown sandstone in heavy bed 10 " 



3. Clay ironstone 1 foot. 



4. Laminated dark blue sand and light gray clays 



with iron pyrites 8 feet. 



5. Lignite 2 inches. 



G. Same as No. 4 5 feet. 



7. Thin seam of ferruginous sandstone 6 inches. 



8. Same as No. 4, getting darker in lower portion of 



the beds and covered in places with a yellow 

 efflorescence of sulphur. Water issuing from 

 these beds is sulphurous and the springs show 

 considerable quantities of hydrogen sulphide 



to level of river 15 feet. 



Five miles farther up the river is Hall's Bluff showing a section of: 



1. Gravel and sand 25 to 30 feet. 



2. Fossiliferous sandstone containing Ostrea sella for- 



mis, var. divaricata Lea, Cerithium vinctum 

 Whitf. , and casts of others 4 " 



3. Red sandstone 10 " 



4. Yellowish-white sand 2 " 



5. Brown clay with gypsum crystals b' inches. 



6. Yellowish- white sand 5 feet. 



7. Irregular stratum of clay ironstone boulders . . 8 inches. 



"' Harris Mss. 



