20 BULLETIN 181, UNIT'ED STATES NIATIONAL MUSEUM 



FARCIMEN (FARCIMEN) TORREI (Guitart) 



Plate 6, Figuees 4-6 



1936. Mcgaloma stoma torrei Gotart, Mem. Soc. Cubana Hist. Nat. "Felipe 

 Poey," 1936, pp. 105-106, figs. 1, 2. 



Shell very small, elongate-ovate. The early whorls are wax yellow 

 with an orange flush, the last one being darker. The nuclear whorls 

 are decollated. Postnuclear whorls rather well rounded, marked by 

 slender, almost hairlike, slightly retractively curved axial riblets which 

 are about one-third as wide as the spaces that separate them. These 

 riblets become a little more distantly spaced on the last whorl. Suture 

 well constricted. Periphery well rounded. Base slightly protracted, 

 openly, moderately broadly umbilicated, the umbilical angle marked 

 by an obsolete cord. Aperture circular; peristome thickened, except 

 on the parietal wall, where it is much thinner. Operculum typically 

 farcimenid. 



The specimens in our collection are paratypes received from Guitart 

 and were collected on the banks of the Eio Manajanabo. The speci- 

 men described and figured, U.S.N.M. No. 535918, has 4.5 whorls re- 

 maining and measures : Height, 16.9 mm. ; greater diameter, 8.4 mm. 



FARCIMEN (FARCIMEN) OBESUM, new species 



Shell varying from medium size to large, pale chestnut-brown, with 

 the peristome pale yellow. The nucleus consists of a little more than 

 one turn, which is well rounded and smooth. Postnuclear whorls 

 rather inflated, moderately well rounded, marked by almost vertical, 

 gently curved axial riblets which are about as wide as the spaces that 

 separate them. Suture well impressed. Periphery well rounded. 

 Base rather openly umbilicated with an obtuse carina marking the 

 outer edge of the umbilicus. The umbilical wall is marked by the 

 continuation of the axial riblets. xVperture circular, oblique, decidedly 

 expanded ; the peristome is Broadly expanded, reflected, and decidedly 

 thickened, somewhat auriculated at the posterior angle and also at 

 the posterior portion of the inner lip, which does not touch the pre- 

 ceding turn. Operculum typically farcimenid. 



This species occupies the northeastern mountains of Santa Clara 

 Province. 



We are recognizing two subspecies, which the following key and 

 descriptions will help to differentiate : 



KEY TO THE SUBSPECIES OF FARCIMEN (FARCIMEN) OBESUM 



Diameter more than 17 mm obesum 



Diameter less than 15 mm subobesum 



