AMERICAN JOURNAL 



Dimeiisions. — Length a little less than 1 inch, tranverse 

 diameter -45 inch. 



Locality. — Six miles above Claiborne, Alabama. 

 Pleueotoma nasuta. 



Description. — Shell fusiform, much elongate and slender; 

 spire consisting of five or six whorls; volutions concave above, 

 subangular in the middle, and rounded below, marked on the 

 middle bj a row of longitudinally-elongate nodes; entire sur- 

 face marked by fine, somewhat alternating, revolving lines, 

 less distinct on the channel formed by the notch of the aper- 

 ture; suture distinct, bounded below by an elevated band; 

 aperture narrow, elongate, and, together with the long, straight 

 canal, forming more than one-half the length of the shell. 



Locality. — Six miles above Claiborne, Alabama, west side 

 of the river. 



Pleurotoma pees a. — t. 27, f. 4. 



Description. — Shell broadly-fusiform; volutions seven or 

 eight, concave on the upper side, and rounded below, leaving 

 a rounded ridge just above the suture line; columella elon- 

 gate, very slender, and bent a little backwards near the lower 

 extremity; aperture elliptical, not quite as long as the canal 

 below, the two together forming about one-half the length of 

 the shell; deeply notched in the upper part; surface marked 

 with very fine, closely-arranged revolving lines, which are 

 crossed by fine lines of growth, having a strong retral curva- 

 ture on the upper part of the volution. 



Dimensions. — Length of shell 1-12 inches, transverse diameter 

 •85 inch. 



Locality. — Nine miles below Prairie Bluff, Alabama. 



Pleueotoma adeona. 



Description. — Shell fusiform; spire moderately high; volu- 

 tions five, deeply concave on the upper side, carinate in the 

 middle, and rounded below; ornamented on the carina by 

 strong, oblique nodes, about fifteen on the body whorl; col- 

 umella long, straight, and, with the aperture, forming more 

 than half the length of the shell ; entire surface marked by 

 fine revolving striae, and crossed by lines of growth having a 

 deep retral curvature on the concave portion of the volution. 



Locality. — Nine miles below Prairie Bluff, Alabama. 



