I'x Bulletin- 15 383; 



5. Hard , drab,, fossiliferous li mestone, 

 glauconitic; forms the cap rock 

 of the fourth falls, 6 inches.. 



4. Soft, blue-, glauconitic marl, %% feet. 



5. Indurated, fossiliferous, greyish 



marl, making a secondary cap, i foot. 



6. Soft^ yellaw, fossiliferous marl,, 



undermined at base of falls, 4 feet, 



7. Slope between- fallSr unexposed, 4 " 

 B. Indurated grey mart with few fos- 

 sils. Forms cap of third falls,, 2 "' 



9. Soft, grey marl, 3, " 



ID. Grey sandstone, i fooC- 



1 1 . Slope between falls, unexpx>sed, 3. feet.. 



,12, Hard, grey limestone with Crassa- 

 tella and Cardium. Upper six 

 inches filled with PeBen, Forms 

 cap of second falls, 23 



13. Drab colored marl. Cytherea bed, 4 "^ 



14. Dark,, bluish-black, laminated, 



somewhat micaceous,, lignitic 



clay, g "" 



15. Slope between fall's, unexposed,. 6 " 



16. Same as 14, with a few faint casts, 7 " 

 To water level of Centennial Lake, 200 " 



A photograph, taken by Prof. Harris, of the falls is shown 

 as the frontispiece. This represents typical Vicksburg limestone. 

 The cap rock is the hard grey limestone with Crassatella, Cardium 

 and PeSlen (12). Beneath is the softer, drab colored marl with 

 Cytherea (13), which is being undermined by erosion. 



Species f7vm Vicksburg . The material colle<5led from the fos- 

 siliferous beds in Mint Spring Bayou and from an outcrop of the 

 Area bed on the Cemeterj^ road contains the following species:* 



Terebra divisurum Q,oxi., Area bed. 



" tantula Con,, *' " 



* The original descriptions of Conrad's Vicksburg species are chiefly in 

 the Proc. Acad. Nat. Sci., Phila., 1847; see a\s,o Journal, same Acad., 2nd 

 ser., vol. 1, 1848. 



