215 LiGNiTic Stage 23 



green streak left, when a grain is crushed upon a piece of white 

 paper, with the moistened point of a knife. 



"3. This is a bed of bluish sand, the thickness of which was 

 concealed, as the sedlion is only traced by following the stream 

 in its downward course along its channel ; the beds being often 

 in part concealed from the sliding down of the surface beds. 



"4. The overlying black, tenaceous clay, and lignite of this 

 part of the secftion, differ in no respecft from a similar bed already 

 described. In the laminated cla}', leaves of dicotyledinous 

 plants are not uncommon. 



"5, 6 — Represent beds seen on another part of the stream be- 

 low the preceding. 



' 'The following are among the most abundant fossils at this lo- 

 cality : 



Osh^ea compressirostra. Valuta sayanaf 



Cytherea. Cardiu7Ji riicolleti. 



Cardita planicosta. Infimdibichcm trochiformis . 



Rostellaria velata. Solarium. 

 AdcEon poniilhis. 



"The oyster shells found here are large and and ponderous, 

 and resemble very closely a variety of O. compressirostra found 

 on Santee canal, South Carolina. 



''Rostellaria velata has a longer and more attenuated canal than 

 the Claiborne fossil. Cardita planicosta is in finer preservation 

 than I have seen it elsewhere, The fossil that I have referred 

 with doubt to V. say ana, at certain stages of growth, has a 

 thick callus on the columella, which partlj^ conceals the spire. 



"Whether this be a prolongation of the Claiborne bed or not, I 

 am as yet unable to decide. The mineral composition is dif- 

 ferent ; and although the greater number of fossils are identi- 

 cal with those of Claiborne, yet as a group they are very distindt, 

 besides containing forms not found at that locality. But these 

 differences, considering the wide interval between the two lo- 

 calities, are quite consistent with their identity. 



"Five or six miles south of Choctaw Corner,* and on the east 

 of the way to Macon, on the road to Tallahatta springs, thick 

 ledges of rock are seen outcropping toward the top of the 

 hills, and associated with a stratum of white silicious, and in 



* This name is now transferred from the place indicated on the map, to 

 where the post office is kept. 



