Geological Survey of Alabama. 73 



TRIFORIS DISTINCTUS, n. sp. PL 1, figs. 5, 5a. 



Small, slender ; whorls convex, with three noduliferous, longitudinal 

 lines, the uppermost of which is the smallest ; suture marked by a small, 

 plain, elevated spiral line ; mouth subquadrate ; base with a distinct and 

 an indistinct spiral line ; length of the five lower whorls, two and one- 

 half mm. 



Locality. Claiborne, Ala. 



The species is very distinct from the preceding in its convex whorls 

 and in the line along the suture. Owing to the lowest spiral, the whorls 

 appear almost carinated at their lowest part. An essential characteristic 

 is in the upper line being the smallest and apparently last developed, the 

 species resembling, in this point, the German Tertiary Cerithium (Triforis) 

 Fritschi, v. Keen en.* 



TRIFORIS BILINEATUS, n. sp. PL 2, fig. 16. 



Small ; whorls flat, with two lines of separate, rounded nodules ; base 

 with a revolving line near the suture. 



Locality. Red Bluff, Miss. 



Differs from all the preceding species by having only two revolving 

 lines. As the distance of the lines is about equal, the shell looks like 

 being uniformly covered with spirals, and the whorls can scarcely be dis- 

 tinguished from each other. 



NASSA MISSISSIPPIENSIS, Con., sp. var. PL' 2, fig. 11. 



Besides the typical form, there occurs both in the Higher and Lower 

 Vicksburgian, but is rare, a variety with more numerous transverse ribs. 



CANCILLARIA TURRITISSIMA, n. sp. PL 1, fig. 15. 



Turreted ; the convex whorls very oblique to the axis of the shell ; 

 apex obtuse, smooth, the shell otherwise covered with numerous spiral 

 lines, crossed by some transverse, large ribs ; aperture semicircular ; 

 columella with three folds the uppermost very prominent, the lowest 

 indistinct ; outer lip sharp, striate within at some distance from the aper- 

 ture. 



Locality. Claiborne, Ala. 



The first two embryonic whorls form almost a disk, thus making the 



*N. Jahrb.f. Mineralogie, etc., 1882, Beilageband II., p. 271, pi. 6, fig. 19. 



