Geological Survey of Alabama. 69 



NATICA DECIPIENS, Meyer. PL 2, fig. 22. Am. Jvur. Sci., XXIX., 

 1885, p. 464. 



Spire rather elevated; whorls six, flattened; aperture semilunar, two- 

 thirds of the entire length; umbilicus deep; on the inner lip callus is 

 spread, which forms a prominence at the posterior end of the aperture ; 

 inner lip distinctly emarginate in front of the umbilicus. 



Locality. Vicksburg, Miss. 



It has a more transverse form than Natica parva, Lea., from Claiborne, 

 which is else very similar. The type-specimen is from the "Lower 

 Vickburgian"; but it occurs also in the " Higher Vicksburgian." 



AMAURA TORNATELLOIDES, n. sp. PI. 1, fig. 12. 



Shell oval ; imperf orate, smooth ; spire conical ; apex obtuse ; suture 

 very distinct; whorls five; columella thickened; aperture semicircular 

 acute posteriorly, and with an indistinct broad emargination anteriorly. 



Locality. Claiborne, Ala. 



I found only the figured specimen. 



RISSOINA MISSISSIPPIENSIS, n. sp. PI. 2, fig. 17. 



The only specimen found has four smooth, embryonic whorls ; the first 

 two of which form a disk, thus making the apex blunt ; then four adult 

 whorls follow which are slightly convex, and are densely covered by in- 

 distinct, rounded, oblique, transverse ribs ; base with faint revolving 

 lines ; aperture semilunar, faintly channeled anteriorly ; receding poste- 

 riorly, thus giving a strongly sigmoid appearance to the outer lip. 



Locality. Jackson, Miss. 



ACLIS MODESTA, n. sp. PL 2, fig. 1. 



Minute; the sinistral nearly vertical; nucleus consists of two^smooth 

 whorls : adult whorls five ; little convex ; flattened immediately below 

 the suture ; covered with microscopical spiral lines ; aperture regularly 

 elliptical. 



Locality. Claiborne, Ala. 



Only the type-specimen was found. 



TURBONILLA NEGLECTA, n. Sp. PL 1, fig. 4. 



Subulate ; whorls flattened, closely covered with broad and distinct 

 transverse ribs, ending rather abruptly on the last whorl and leaving the 

 base smooth ; aperture subquadrangular, longer than broad ; inner lip 



