﻿137 Florida Oligocene Shells 19 



This little species bears some resemblance to Dr. Dall's M. 

 Holmesii of the Caloosahatchie marls. 



Chipola Oligocene, Bailey's Ferry, Florida. 

 Cornell University collection. 



Mitra Berkeyi, n. s. 

 PI. V, fig. 2. 



Shell when perfect with about seven whorls, the single speci- 

 men found being decollated and showing only six. Transverse 

 sculpture of riblets so extremely fine as to be barely visible with- 

 out a lens on the three earlier whorls but becoming slightly 

 broader on the last three whorls so as to be easily seen by the 

 unaided eye. Spiral sculpture of revolving threads developed 

 only on the last three whorls where they equal in strength the 

 transverse ril lees and form with them a moat exquisite and deli- 

 cate cancellation covering the entire surface of the three later 

 whorls. Columella with four plaits ; aperture elliptical ; canal 

 short, reflexed. Length of shell 9 ; greatest width 3.5 mm. 



Chipola marls, Bailey's Ferry, Florida. 



Cornell University collection. 



Named in honor of Dr. Berkey of Columbia University. 



Fusus Gil/i, n. s. 

 PI. V, fig. 3. 



Shell with six convex whorls of whi. h the' first three are 

 smooth and the remainder sculptured. Spiral sculpture of well- 

 defined threads alternating in size. Longitudinal sculpture of 

 rounded riblets (ten on the last whorl). Suture waved ; pillar 

 nearly straight ; aperture and canal key-hole shaped. t Length of 

 shell 9 ; greatest width 4 mm. 



Named in honor of Professor Gill of Cornell University. 



Oak Grove, Florida. 



Mr. Aldrich's collection. 



Fasciolaria fCindlei, n. s. 

 PI. V, fig. 4. 

 Shell small, slender, fusiform ; earlier whorls eroded, remain- 

 ing whorls, fi\t; suture fairly distinct; transverse sculpture of 



