Bulletin 22 



the whorl starting with a .row of spiral and strongly mark- 

 ed tubercles which gradually double and are somewhat in- 

 clined to the vertical axis ; just above this double series an- 

 other appears with tubercles twice as long spirally as high ; 

 the fascicular surface very concave, marked by three or four 

 broad but dim spiral lines ; fasciole nearly semicircular ; body 

 whorl ornamented with numerous coarse tubercles set in spi- 

 rals also inclined to the axis ; outer lip striated within ; col- 

 umella nearly straight, slightly bent to the left at base ; cal- 

 lus thin, showing several spirals passing into the interior, one 

 on the central part almost might be called a plait. 



Length 12 ; breadth of body-whorl 6 mm. 



Newton, Miss. Lower Claiborne horizon. 



Pleurotoma {Bathytoma) marieana, n. sp. 



Plate II, fig's. 3, and Plate III, fig. 1 

 Shell small, whorls six, the first smooth, the next with 

 spiral lines and a few faint axial ones ; body-whorl profuse- 

 ly ornamented, cancellated, the periphery of this whorl car- 

 rying three close-set spirals which give the appearance of a 

 raised, beaded line ; the space between the periphery and 

 the suture strongly concave aud carrying the retral sinus ; 

 suture distinct. 



Woods Bluff horizon, six miles east of Thomasville, Ala. 

 This little species is represented by two specimens both 

 of them young. The figures do not show the periphery of 

 the body-whorl correctly. 



Scobinella scidpturata , n. sp. 

 Plate II, fig's 4, 5 



Shell rather small, solid ; whorls eight, ornamented with 

 close-set ribs oblique to the vertical axis ; suture bordered 

 above by a strong nodulous spiral ; body-whorl marked by 

 numerous spiral lines, which cut into the ribs much the 

 same as in Scobinella elaborata, Con. Sinus semicircular, car- 



