﻿147 Florida Oligocene Shells 29 



sive of the eroded nucleus, rather convex. Sculpture consisting 

 of very fine spiral striae visible only under a lens. Aperture 

 oval ; outer lip simple, thin. Length of shell 5 ; greatest width 

 2.5 mm. 



Oak Grove, Santa Rosa County, Florida. 



Mr. Aldrich's collection. 



Natica Judsoni, n. s. 



PI. VII, fig. 6. 



Shell smooth and polished, small, with four sloping whorls ; 

 suture distinct ; lines of growth conspicuous but not forming 

 wrinkles ; callus heavy especially on the body, but not extending 

 over the profound sink. Length of shell 18 ; greatest width 

 13 mm. 



Named in honor of Dr. Judson of Dobbs Ferry, New York. 



Oak Grove, Santa Rose County, Florida. 



Mr. Aldrich's collection. 



Adeorbis Aldrichi, n. s. 

 PI. VII, fig. 7. 

 Shell very small, flattened, four-whorled ; suture very dis- 

 tinct ; periphery slightly carinated ; whorls smooth on the upper 

 surface and with a single carination 011 the under surface around 

 the profound umbilicus. Greatest diameter of shell 1 mm. 

 Oak Grove, Florida. 

 Mr. Aldrich's collection. 



Sca(a Virginia \ n. s. 

 PI. VII, fig. 8. 

 Shell small, delicate, seven-whorled ; nuclear smooth and 

 polished, subsequent whorls convex, sharply separated by a deep 

 suture ; transverse sculpture of prominent, slightly oblique, 

 sharp-edged, lamellar varices (ten on the body- whorl) which 

 tend to coronate the whorls ; spiral sculpture of microscopic stria; 

 between the varices ; aperture round. 



Length of shell 3.75 ; greatest width 1.5 mm. 



