Geological Survey of Alabama. 75 



ing it ; outer lip sharp, spirally striated within at some distance from the 

 margin. 



Locality. Claiborne, Ala. 



It is impossible for me to decide whether the fragment of a young 

 shell, which H. C. Lea described as Mitra gracilis, belongs to this species 

 or not. 



CONUS PROTRACTUS, Meyer. PI. 2, fig. 7. Am. Jour. Sci., XXIX., 

 1885, p. 466. 



Spire nearly a third of the entire length ; four smooth, rounded, embry- 

 onic whorls are followed by seven carinated volutions ; the carina is some- 

 what crenulated ; base with numerous broad, depressed lines. 



Localities. Vicksburg, Miss., Red Bluff, Miss. 



Young specimens of Conus sauridens, Con., resemble the species, but 

 their spires are concave and covered with revolving lines, which are absent 

 in C. protractus. 



PLEUROTOMA TEREBRIFORMIS, n. sp. PI. 2, tig. 8. 



Spire high ; aperture and canal small, only about a quarter of the 

 entire length ; apex blunt, formed by two and a half smooth, embryonic 

 whorls ; adult whorls seven or eight they are flat, have a revolving line 

 above and below and a carina-like, noduliferous double line in the middle ; 

 on the older whorls more spirals appear in the interstices ; the striae of 

 growth indicate a flat sinus, situated on the line in the middle ; suture 

 distinct. 



Localities. Claiborne, Ala., rare; Newton, Miss., Wheelock, Texas. 



The type-specimen is from Claiborne. 



PLEUROTOMA JACKSONENSIS, n. sp. PI. 2, fig. 10. 



Spire elevated, rather suddenly decreasing near the blunt apex ; aper- 

 ture and canal about one-third of the entire length ; whorls covered with 

 elevated, revolving lines and transverse ribs ; a distinctly marked depres- 

 sion on the upper part of each whorl indicates the position of the rather 

 deep sinus ; columella thickened ; outer lip crenate within. 



Locality. Jackson, Miss., rare. 



PLEUROTOMA INFANS, n. sp. PI. 2, fig. 9. 



? Fusus nanus, Lea. Contrib. to Geol., p. 150, pi. 5, fig. 155. 



