78 Geological Survey of Alabama. 



form a blunt apex ; adult whorls nearly flat, covered with elevated, flat, 

 smooth spiral lines, separated by interstices of about equal breadth. 

 These interstices are set with rather distant, elevated, transverse riblets, 

 which, under the glass, give to the shell an almost cancellated appearance. 

 Inner lip with a very strong and broad fold ; in the oldest specimens, 

 with a smaller one above it. 



Localities. Jackson, Miss., Red Bluff, Miss. 



The figured specimen from Jackson is much larger than the others ; 

 and from Red Bluff I have only the smaller form, represented by more 

 than a dozen specimens. Resembles Actami punctatus, Lea., from Clai- 

 borne, but is much smaller, has a stronger fold, besides an additional one. 

 The interstices between the revolving lines are larger, and the small ribs 

 in them more distant and distinct. 



ACTION INFLATIOR, n. sp. PL 2, fig. 31. 



Globose, apex blunt; whorls six, covered with revolving impressed 

 punctate lines ; columella with one fold. 

 Locality. Claiborne, Ala. 



The longitudinal lines are continuous along the volutions ; on the body 

 whorl of the type-specimen, however, another system of these lines begins 

 to appear between them. The single fold, together with the globose, reg- 

 ularly rounded form, distinguish this species from the other Actseon of 

 the Southern Tertiary. 



PTEROPODA. 

 STYLIOLA SIMPLEX, 11. sp. PL 3, fig. 10. 



Shell subulate, nearly straight, smooth ; section circular. 



Locality. Jackson, Miss. 



The closed end of this species is not inflated. 



STYLIOLA HASTATA^ n. sp. PL 3, fig. 11. 



Shell subulate, nearly straight ; section circular ; closed end inflated. 



Localities. Vicksburg, Miss. (Higher and Lower Vicksburgian) . 

 Red Bluff, Miss. 



Seems to be of smaller size than the preceding species. The type- 

 specimen is from the Lower Vicksburgian. 



