THE CYCLOPHORID LAND M0LLUSK9 OF AMERIOA 37 



short, inflated, strongly rounded, and marked by an obsolete keel at 

 the outer rim of the umbilicus. Aperture circular; peristome only 

 moderately expanded, rejflected, and slightly produced on the basal 

 lip, a little wider on the columellar wall than on the rest, almost as 

 wide on the parietal wall as on the outer lip. The operculum is not 

 known. 



The type, U.S.N.M. No. 535938, was collected by Arango at La 

 Caja, Pinar del Rio Province. It has 5.4 whorls remaining and 

 measures: Height, 16.1 mm.; greater diameter, 8.3 nrni. 



FARCIMEN (FARCEWEN) GUANENSE, new species 



Shell elongate-ovate. Nuclear whorls white, the rest pale orange, 

 or the last whorl may even be partly or wholly brilliant orange or 

 purplish. Nuclear whorls 1.5, small, well rounded, smooth. Post- 

 nuclear whorls well rounded, narrowly shouldered at the summit, 

 the first three marked by slender, well-raised, rather closely spaced, 

 and retractively slanting axial riblets, while on the remaining turns 

 these become obsolete or are merely indicated near the summit. 

 Suture well constricted. Periphery well rounded. Base protracted, 

 openly umbilicated, marked by a rounded carina at the umbilical junc- 

 tion. Aperture circular : peristome rather broadly expanded and re- 

 flected, protracted on the columella, narrower on the parietal wall 

 and marked by concentric lines of growth. Operculum typically 

 farcimenid. 



We are recognizing two subspecies, which the following key will 

 help to differentiate : 



KEY TO THE SUBSPECIES OF FARCIMEN (FARCIMEN) GUANENSE 



Shell large, about 28 mm. high guanense 



Shell small, about 23 mm. high lagunillense 



FARCIMEN (FARCIMEN) GUANENSE GUANENSE, new subspecies 



Plate 7, Figures 1-3 



This race comes from the region of Guane. We have it from the 

 caves of the mogotes on the south side of the road opposite the Sierra 

 cle Guane ; Los Portales ; La Murrallia ; and from the mogote at Punta 

 de la Sierra, Pinar del Rio Province. It is distinguished from F. (F.) 

 guanense lagunillense by being much larger, more elongate and with 

 a more protracted base. 



The type, U.S.N.M. No. 535926, from Guane, has 7.6 whorls and 

 measures : Height, 29.2 mm. ; greater diameter, 13.4 mm. 



