221 IviGNiTic Stage 29 



and are turned on one side or bottom side up along the cliff that 

 our best fossils were obtained. Numerous cavities are noticeable 

 all along this ledge where huge Venericardia planicosta and Os- 

 trea compressirostra have been dissolved out. But by far the 

 most charadleristic fossil of this horizon is the Gryphcea thirsce of 

 Gabb. Other fossils are: Venericardia alticostata vzx . .C^assatella hal- 

 ei, Cardium tuomeyi,Pectunculus, Levifusus pagoda{y&cy large and 

 spinous), Turriiella humerosa, T. mortoni, Cornulina armigera, 

 Calyptraphoriis trinodiferus , Volutilithes petrosus, Capuhis C07n- 

 plectus, Mesalia alabamiensis (2 var.) Pseudoliva scalina, et. al. 



In going down the river below Nanafalia a charadlerstic fea- 

 ture of the outcrops is the number of enormous concretions they 

 exhibit. These show clearly that the dip of the strata is south- 

 ward, though reverse dips and local unconformities are noticeable. 

 Dark lignitic and grayish sands, more or less indurated prevail 

 for a number of miles. At Tuscahoma landing there are no 

 such fossiliferous beds as at Nanafalia, yet Aldrich has secured 

 from them several new species. The species noted by the 

 writer are : Turritella mortoni, T. prcecincta, Levifusus pagoda 

 Volutilithes petrosus, Calyptraphorus trinodiferus , Pletirotoma ca- 

 pax, Venericardia planicosta, Pedunculus sp. These were picked 

 out from the bank four feet above water level (about July i) 

 just below the landing. 



The next outcrop of any considerable importance is formed 

 by a low bank on the south ^ide of the river as the latter 

 swings westward, near the mouth of Bashi creek. The fauna 

 is decidedly upper lyignitic and hence is closely allied to that of 

 Woods bluff. Here were obtained: OstreawdX. sylvcsrupis, Meretrix 

 nuttalliopsis, Corbula aldrichi, C. concha, Cornulina armigera, 

 Hemifusus engonatus, Volutilithes petrostis, Pseudoliva vetusta, 

 Tornatellcea bella, Pleurotoma tombigbeensis , Pleurotoma sp. 



The next well known fossiliferous outcrop is at Woods 

 bluff. Here the following beds were observed : 



1. Soil, sand, pebbles at base 40 feet 



2. Black clay, about 8 feet 



3. Line of concretions 4 inches 



4. Fossiliferous reddish and variegated clay 3 to 6 feet 



5. Black clay • ••• 10 feet 



6. Reddish fossiliferous sand 2 feet 



7. Fine gray fossiliferous sand 5 feet 



