Geological Survey of Alabama. 31 



rounded ; canal moderate, open, bent a little to the right ; columella with 

 a reflected callus near the the beak. 



Locality. Lower bed, Wood's Bluff, Ala. 



On younger specimens the constriction below the suture is obsolete, 

 being replaced by a few faint revolving lines. Resembles P. longiforma 

 nob'is, but in some respects differs. It is much more fusiform, heavier, 

 the body whorl much more tapering below. The aperture gradually 

 diminishes anteriorly, while in the first-mentioned species, and in P. 

 Gabbi, Con., the canal is long and slender. 



PLEUROTOMA TUOMEYI, n. sp. PL 3, fig. 11. 



Shell narrow, fusiform; spire high; whorls twelve, the first three 

 rounded and smooth, next with revolving lines, and the balance strongly 

 carinated with two or more revolving lines some distance apart, with 

 numerous fine ones between, these last alternate. Suture bounded below 

 by a fine raised line ; surface, from first carination to suture, concave, 

 showing exceedingly fine but distinct lines of growth, which spread over 

 the whole shell. 



Body whorl with two strong raised carina, the upper one sometimes 

 double, with lesser lines below, alternating with a number of finer ones. 

 Slit narrow, deep and rounded, situated between the raised sutural line 

 and the first carination. Aperture oblong, narrow, terminating in a long, 

 straight canal ; beak slightly turned to the left. 



Locality. Lower bed, Wood's Bluff, Ala. 



The largest specimen measured 1^" in length a beautifully orna- 

 mented shell, quite rare. Prof. Michael Tuomey was the first to visit 

 this locality, where so many of these new species come from. 



PLEUROTOMA (ANCISTROSYRIKX) COLUMBARIA, n. sp. PI. 6, fig. 9. 



Shell small, fusiform; whorls ten; the nucleus smooth, composed of 

 three whorls; the remaining seven shouldered, and armed with erect 

 spines rising above the edge of the shoulder, giving to the shell a pagoda 

 form; upper part of whorls smooth, concave, with a faint broken line 

 just below the suture, composed of longitudinal strise ; lower part of the 

 whorls with nine or ten coarse alternate revolving rows of rounded tuber- 

 cles, which extend over the spines. Slit rather large, semicircular. 



Locality. Dry Creek, Jackson, Miss. 



The body whorl is broken away, rendering it impossible to complete 

 the description. Closely resembles Fusus pagoda, Lesson, a living Philip- 



