38 BULLETIN 181, UNITED STATEISI NATIONAL MUSEUM 



FARCIMEN (FARCIMEN) GUANENSE LAGUNILLENSE, new subspecies 



Plate 7, Figukes 19-21 



This small race was collected by Wright at Lagunillas in the Dis- 

 trict of San Juan Martinez, Pinar del Kio Province. It differs from 

 the typical race in being much smaller, having the last whorl pro- 

 tracted, and having the basal two-thirds of the last whorl orange col- 

 ored or darker. 



The type, U.S.N.M. No. 535927, has 6.4 whorls remaining and meas- 

 ures: Height, 23.0 mm.; greater diameter, 12.1 mm. 



FARCIMEN (FARCIMEN) PROCER (Poey) 



Plate 7, Figubes 25-27 



1852. Cycjostoma tortum var. Poey, Memorias sobre la historia natural de la Isla 



de Cuba, vol. 1, pi. 13, figs. 12-18. 

 1854. Megalomastoma procer Pobtt, ibid., p. 404. 

 3S56. Megalomastoma complanatum Pfeiffer, Proc. Zool. Soc. London, vol. 24, 



p. 36. 



Shell rather large, pale chestnut-brown with an olivaceous flush; 

 the early whorls lighter and the last one darkest. Peristome white; 

 interior of the aperture reflecting the external coloration. Nuclear 

 whorls almost 2, small, w^ell rounded, smooth. The postnuclear whorls 

 are well rounded and marked by slightly retractively curved, slender, 

 hairlike axial riblets on the early turns, which grow less strong on the 

 succeeding whorls and become obsolete on the last. Suture slightly 

 constricted. Periphery well rounded. Base somewhat produced, 

 with an obsolete shoulder at the outer margin of the moderately wide- 

 open umbilicus. Aperture subcircular; peristome broadly expanded, 

 widest on the inner lip, thick, reflected. The posterior portion of the 

 expanded lip almost touches the preceding turn and largely hides the 

 umbilicus when viewed squarely. The peristome on the parietal wall 

 is exceedingly narrow. Operculum typically farcimenid. 



This species comes from the Isle of Pines, where we collected it in 

 large numbers on the Sierra de Casas, Sierra de Caballus, Sierra de 

 Colombo, and the Morrillo del Diablo. In the latter place they appear 

 to be a trifle smaller. 



The specimen described and figured, U.S.N.M. No. 535939, was col- 

 lected by Bartsch at the northwestern part of the Sierra de Casas. It 

 has almost 7 whorls remaining and measures: Height, 32.7 mm.; 

 greater diameter, 15.9 mm. 



Aperostominae, new subfamily 



Cyclophorid moUusks having a helicoid shell and an operculum 

 bearing calcifications on its external surface. 



