60 Geological Survey of Alabama. 



TABLE IX. 



BLACK BLUFF GROUP. 



This bed consists principally of a bed of very dark clay, which has a 

 fine exposure on the Tombigbee Kiver at Black Bluff, Sumpter County, 

 and I believe is the lowest Tertiary seen on that river. It forms a belt 

 of low-lying prairie just south of the Cretaceous hills. 



Its fossils would unite it to the Matthews' Landing group. 



Nautilus, n. sp. (fragments). Tornatella bella, Con. 



Exilia pergracilis, Con. 



Mitra, n. sp. Pecten (Pleuronectia) Alabamensis,Aldr. 



Aphorais gracilis, Aldr. Cucullaea macrodonta, Whitf . 



Ancillaria, sp. Nucula magfaifica,.Con. 



Pleurotoma, 2 sp. Leda, n. sp. 



Fusus, 2 sp. 



Cadulus turgidus, Mr. Coral, sp. 



Volutalithes rugata, Con. Crab remains (abundant). 



Dentalium, sp. Foraminifera, 2 sp. 



TABLE X. 



MIDWAY GROUP. 



Consists of a few feet of material at the base of the Tertiary ; a bed 

 containing a species of Turritella being immediately contiguous to the 

 Cretaceous. The fossils of this and the previous group are either dis- 

 torted or badly preserved, and by weathering of the materials often 

 mixed with the underlying Cretaceous. The species here mentioned were 

 all found "in situ." 



1st. MIDWAY BED consisting of a hard, silicious limestone. 

 EnclimatocerasHyatti? White. 



2d. TURRITELLA EOCK. 



Turritella Mortoni ? Con. Ostrea, 2 sp. 



" humerosa? Con. Coral, 2 sp. 



Venericardia planicosta, Lam. 



In conclusion, it must be understood that these lists represent collections 

 made personally in company with Dr. E. A. Smith and D. W. Langdon, 

 Jr., and are as nearly accurate as the writer can make them, without a 

 series of fossils carefully compared with types ; they represent many days 

 and nights of hard work. 



FINIS. 



