51 



PLEUROTOMA PRORUTA. Tab. 17, fig- 16. 



Fusiform, smooth ; whorls convex, with a submarginal impres- 

 sed line ; body whorl ventricose ; ubmargin of the labrum with a 

 slight oblique varix ; labrum emarginato near the base. 



Locality. Claiborne, Alab. 



Allied to P. prisca t Sow, I formerly referred it to Fusus, but 

 having examined more perfect specimens, I find it possesses the 

 emarginate labrum, 



PEUROTOMA NUPERA. Tab. IT, fig. 10. 



Fusiform ; whorls angular, obliquely crenulated on the angle, 

 and with fine revolving wrinkled lines; suture margined beneath 

 by an obtuse obsolete carina ; beak somewhat produced. 



8yn. P. DKSNOYKKSII, P. HJKNINUHAUSII, P. RUGOSA, Lea, Con. 

 p. 135, 130, pi. 4, /. 128, 129, 130. 



Locality. Claiborne, Alab. 



PLEUROTOMA CONOIDES. Tab. 17, fig. 17. 



Fusiform ; spire conical acute ; apex obtuse ; whorls convex, with 

 a few revolving lines, distinct near the suture, obsolete on the 

 wider part of the body whorl and distinct at base ; aperture con- 

 tracted ; beak short, straight, slightly grooved longitudinally. 



Locality. Claiborne, Alab. 



PLEUROTOMA SUBEQUAL1S. Tab. 17, /. 18. 



Fusiform ; whorls angular, tuberculated on the angle, and with 

 minute revolving stria) ; body whorl ventricoso ; beak rather longer 

 than the spire. 



Locality, Claiborne, Alab. 



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