﻿125 Florida Oligocene Shells 



bands. Aperture oval ; canal nearly straight ; notch shallow, 

 Length of shell 7 ; greatest width 3 mm. 



Named in honor of Professor Kemp of Columbia University. 



Oak Grove, Florida. 



Mr. Aldrich's collection. 



Drillia calligona n. s. 

 PI. II, fig. 1. 



Shell elongated, resembling in form the recent Drillia oslre- 

 arum, Stearns. Spire acute, nuclear whorls two, subsequent 

 whorls seven, of which the two earlier show well-marked trans- 

 verse ribs, but little or no spiral sculpture ; spirals on the later 

 whorls stronger, consisting of primaries with alternating finer, 

 secondary threads in pairs ; transverse ribs stronger and more 

 numerous on the later whorls (twenty-five on the last) and more- 

 sharply defined ; the intersecting ribs and spirals form a beauti- 

 ful cancellation ornamenting the whorls up to the margin of the 

 groove, where the ribs end abruptly ; in the groove lines of 

 growth and fine, sub-equal spirals form the only sculpture ; 

 upper margin of the groove marked by a sharp carination sloping 

 steeply to the suture ; aperture narrow with a smooth callus. 



Length of shell 19 ; of last whorl 1 1 ; of aperture 8 ; great- 

 est width 6 mm. 



This very beautiful species is characterised by the delicacy 

 and elegance of its sculpture. 



Chipola Oligocene, Bailey's Ferry, Florida. 



Cornell University collection. 



Drillia dry ados, ii. s. 

 PI. II, fig. 2 



Shell of moderate size, rather strong, resembling D. Grab- 

 aii/ , with eleven whorls, of which the two nuclear are smooth ; 

 spiral sculpture of close equally inter-spaced grooves which extend 

 over the entire surface of the shell except the nucleus and the 

 crests of the transverse ribs which interrupt the grooves ; trans- 



