﻿i4 Bulletin 21 132 



Glyphostoma Aldrichi, n. s. 

 PI. Ill, fig. 9. 



Shell small, so closely resembling in size and sculpture 

 Pteurotoma boadiceoides that, were it not for the characters of the 

 mouth and for the strong terminal varix, it might be taken for 

 that species. Whorls seven or eight of which all but the nuclear 

 are sculptured. Spiral sculpture of equal threads (eighteen or 

 twenty on the last whorl and three on the preceding whorls). 

 Longitudinal sculpture of nodular riblets developed immediately 

 below the sub-sutural .grooves. Last whorl more than half the 

 length of the shell ; terminal varix strong, developed near the 

 margin of the outer lip ; aperture narrowlj' elliptical ; notch 

 U-shaped, profound ; outer lip with internal lirse ; columella 

 denticulate. Length of shell 7 ; greatest width 3.5 mm. 



Named in honor of Mr. Aldrich. 



Oak Grove, Santa Rosa County, Florida. 



Mr. Aldrich's collection. 



Glyphostoma Harrisi, n. s. 

 PI. Ill, fig. 10. 



Shell of moderate size, strong, ten-whorled ; spiral sculpture 

 of sub-equal threads with wider interspaces, which cover the 

 whole surface of the shell except on the sub sutural grooves 

 where the threads become so faint as to be seen only with the aid 

 of a lens or are obsolete ; transversa sculpture of well-marked 

 ribs with slightly narrower interspaces. The ribs extend from 

 the base of the sub-sutural groove to the succeeding suture and to 

 about half-way down the body whorl. Notch very distinct, 

 deeply cut, narrowly U-shaped ; outer lip with a thick external 

 varix near the edge ; lirate within especially anteriorly ; aper- 

 ture rather narrow ; canal short ; pillar with about 14 denticu- 

 late lirae, callus slight. Length of shell 20 ; of aperture 10.5"; 

 greatest width 9 mm. 



Chipola marls, Bailey's Ferry, Florida. Two specimens. 



Cornell University collection. 



Named in honor of Professor G. D. Harris by whom the 



