THE NAUTILUS. 



VOL. XXVIII. APRIL, 1915. No. 12 



ON SOME NEW CUBAN LAND SHELLS. 



BY CHARLES T. RAMSDEN. 



Among numerous interesting finds in the district of Guanta- 

 namo during the winter, three very distinct forms are selected 

 for the following descriptions. Others are being worked up, 

 and the descriptions will shortly follow. 



UROCOPTIS (ARANGIA) SCOBINATA Torre and Ramsden, n. sp. 

 Plate vi, figs. 3. 



The shell is column-shaped, the upper half tapering to a 

 rather wide truncation ; waxen white, the base livid brown 

 near the lip, both within and externally ; without gloss ; sculp- 

 tured with thin, delicate rib-strise which are stronger near the 

 lower suture on each whorl, and are distinctly crimped ; the 

 irregularities being regular in successive riblets give an appear- 

 ance of spiral sculpture. The whorls are nearly flat, parted 

 by a distinctly impressed suture. The upper breach is closed 

 by a flat, vertical septum, usually concealed by persistence 

 of part of a whorl above it. The last whorl has a very 

 prominent carina defining the base, which is slightly con- 

 vex. The aperture is vertical, irregularly rounded, bluntly 

 angular at the termination of the keel. Peristome thin, reflected, 

 adnate for a short distance above. The internal axis bears a 



