THE CYCLOPHORID LAND MOLLUSKS OF AMEiRIC'A 29 



FARCBVIEN (FARCIMEN) LEONINUM (Pfeiffer) 



Shell varying from small to medium sized, elongate-ovate, usually 

 wax yellow or with the last whorl much darker, even plum colored. 

 Nuclear whorls about 2, quite small, well rounded, smooth. Post- 

 nuclear whorls somewhat inflated, well rounded, marked by slightly 

 sinuous axial riblets, which vary materially in spacing and develop- 

 ment in the two races here recognized. Suture moderately con- 

 stricted. Periphery well rounded. Base protracted, marked by an 

 obsolete carina at the junction with the umbilicus, which is moder- 

 ately open. Aperture subcircular; peristome thickened and reflected, 

 fairly uniform in size excepting that of the parietal wall, which is 

 much narrower and adnate to the preceding turn. Operculum typi- 

 cally farcimenid. 



The species is confined to the central part of Pinar del Rio Prov- 

 ince. We are recognizing two subspecies, which the following key 

 will help to differentiate: 



KEY TO SUBSPECIES OF FARCIMEN (FARCIMEN) LEONINUM 



Shell large, height more than 24 mm leoninum 



Shell small, height less than 21 mm leonellum 



FARCIMEN (FARCIMEN) LEONINUM LEONINUM (Pfeiffer) 



Plai-e 5, FiGUEEs 25-27 



1856. Megalomastoma leoninum Pfeiffer, Malak. Blatter, vol. 3, pp. 48, 122. 



1857. Megalomastoma leoninum Pfeiffek, Nov. Conch., vol. 1, p. 97, pi. 26, 



figs. 23-25. 



This medium-sized race comes from the higher reaches about 

 Rangel. The axial ribs are comparatively strong and rather dis- 

 tantly spaced, particularly upon the early whorls. Its larger size 

 will easily differentiate this subspecies from F. {F.) leoninum 

 leonellum. 



The specimen figured, U.S.N.M. No. 535922, comes from the coffee 

 plantation on the summit of Rangel. It has 5.4 whorls remaining and 

 measures: Height, 25.0 mm.; greater diameter, 12.5 mm. 



FARCIMEN (FARCIMEN) LEONINUM LEONELLUM, new subspecies 



Plate 5, FiGt^ES 4-6 



We have this subspecies from San Jose, Rangel ; Sierra de Limones, 

 and also from a station on the road between Rangel and Guajaibon. 

 It differs from the typical race in being considerably smaller and 

 darker colored and in having the anterior portion of the whorls only 

 slightly ribbed. 



428349—42 3 



