﻿Bulletin 21 128 



Length of decollate shell 10 ; greatest width 4.5 mm. 



Oak Grove, Santa Rosa County, Florida. 



Cornell University collection. 



This species resembles in size and sculpture D. Stonemdni 

 from Bailey's Ferry, but in the latter shell the transverse ribs are 

 more numerous and the notch is very conspicuous, while in this 

 species it is only slightly indented. 



Drillia Stonemani , n. s. 

 PI. II, fig. 7. 



Shell small, short fusiform, whorls about seven, of which the 

 nuclear are smooth ; spiral sculpture of raised threads which are 

 absent only from the sub-sutural bands ; transverse sculpture of 

 fine riblets (ten on the body- whorl) with narrower interspaces ; 

 outer lip thickened near the edge which is crenulate on the inside 

 margin ; notch very marked and prominent ; nearly O-shaped ; 

 aperture narrow ; pillar with a slight callus. Length of shell 10; 

 greatest width 4 mm. 



Chipola marls, Bailey's Ferry, Florida. 



Named in honor of Dr. Bertha Stoneman of the University 

 of South Africa. 



Cornell University collection. 



Drillia Vandenbroecki, n. s. 

 PL II, fig. 8. . 



Shell slender, acute, with ten whorls, of which the three 

 nuclear are smooth and shining ; spiral sculpture of fine, sub- 

 equal threads with wider interspaces. The threads extend ovtr 

 the sub-sutural grooves and thus cover the entire surface of the 

 shell except the three nuclear whorls ; transverse sculpture of 

 well-marked riblets which extend from the base of the sub-sutural 

 groove to the succeeding suture and down over more than one- 

 half the body-whorl ; aperture rather narrow ; outer lip some- 

 what thickened near the edge ; notch deep, distinct, U-shaped ; 

 pillar with a moderate callus ; canal very short, open. Length 

 of shell 13 ; of aperture 5 ; greatest width 4.5 mm. 



Chipola marls, Bailey's Ferry, Florida. 



