﻿22 Bulletin 21 140 



wider interspaces. Longitudinal sculpture of strongly denned 

 riblets (ten on the last whorl) .and a terminal varix. Aperture 

 elliptical ; outer lip lirate within ; canal short, recurved. Length 

 of shell 7 ; greatest width 4 mm. 



Named in honor of Dr. Dall of the Smithsonian. 



Oak Grove, Florida. 



Mr. Aldrich's collection. 



Nassa Harrisi, n. s. 

 PI. V, fig. 9. 



Shell rather small, stout, with an acute spire ; nuclear 

 whorls two, smooth ; subsequent whorls five ; transverse sculp- 

 ture of narrow, elevated ribs (ten to eleven on the last whorl) 

 with wider interspaces ; spiral" sculpture of narrow, slightly 

 raised bands (about eight on the last whorl), the band just be- 

 neath the suture forming nodular intersections with the ribs and 

 thus giving the effect of a row of beads ; outer lip with four or 

 five lirations within ; collumella plicate, the upper fold being the 

 stronger. 



Adult shells of this species resemble in form half-grown 

 specimens of N. Berthce but the beading beneath the suture is 

 more prominent and the ribs much fewer than in that species, and 

 the spirals are not obsolete on the center of the body-whorl. 



Length of shell 8 ; of last whorl 5 ; of aperture 3 ; greatest 

 width 4.5 mm. 



Chipola Oligocene, Bailey's Ferry, Calhoun County, Florida, 

 and also in the uppermost Oligocene of the Oak Grove sands, 

 Santa Rosa County, Florida. 



Dedicated to Professor G. D. Harris of Cornell University, 



Cornell University collection. 



Nassa Veatchi, n. s. 



PL V, fig. 10. 



Shell small, resembling in size the recent A r . acuta, slender, 



nuclear whorls three, smooth ; subsequent whorls also three. 



evenly rounded ; transverse sculpture of near^ straight, narrow 



riblets, of which there are eight on the last whorl and a final, 



