THE CYCLOPHORID LAND MOLLUSKSi OF AMEKIOA 35 



ous on the parietal wall, where it is adnate to the preceding turn. 

 Operculum typically farcimenid. 



"We are recognizing two subspecies, which the following key will 

 differentiate : 



KEY TO SUBSPECIES OF FARCIMEN (FARCIMEN) SUPERBUM 



Shell large, height about 30 mm superbum 



Shell smaller, height about 26 mm itinerarium 



FARCIMEN (FARCIMEN) SUPERBUM SUPERBUM, new subspecies 



Plate 7, FiGtiKES 28-30 



This subspecies occurs on the mountains forming the rim of Los 

 Acostas and Luis Lazo and extends from there eastward on the north 

 side through Pan de Aziicar and Costanera del Abra to the Costanera 

 de San Vicente. On the south side it extends through Isabel Maria 

 to the Sierra del Infierno. This race differs from F. (F.) sujyerbum, 

 itinerarmm^ in being much larger with the whorls more inflated and 

 more rounded. 



The type, U.S.N.M. No. 535931, comes from the Sierra de los Acos- 

 tas, Luis Lazo, Pinar del Rio. It has 8 whorls and measures : Height, 

 32.5 mm.; greater diameter, 16.5 mm, 



FARCIMEN (FARCIMEN) SUPERBUM ITINERARIUM, new subspecies 



Plate 7, Figures 10-12 



This subspecies extends from the Potrerito at Luis Lazo, through the 

 mogotes bordering the road from there to Sumidero, Cabezas and 

 Isabel Maria, in Pinar del Rio Province. 



It is smaller than the typical race and is more inclined to have the 

 last whorl purplish. 



The type, U.S.N.M. No. 535932, comes from Potrerito. It has 7.1 

 whorls and measures : Height, 26.6 mm. ; greater diameter, 14.1 mm. 



FARCIMEN (FARCIMEN) HENDERSONI, new species 



Shell of medium size, elongate-ovate, varying in color on the early 

 whorls from flesh colored to pale chestnut-brown, while the later 

 turns are always darker; they may be unicolor, but usually tend 

 toward purplish plum colored. Nuclear whorls about 2, small, well 

 rounded, smooth. Postnuclear whorls inflated, strongly rounded, 

 marked in the one race by rather strong, retractively curved axial 

 riblets; the other is almost without these. Suture quite strongly 

 constricted. Periphery well rounded. Base only moderately pro- 

 duced, openly moderately umbilicated. Aperture circular; peri- 

 stome very much thickened and reflected, marked by concentric lines 



