THE CYCl/OPHORID LAjS^D MOLLUSKS OF AMERICA 23 



FARCIMEN (FARCIMEN) ALUTACEUM DIGITALE (Gundlach) 



Plate 4, Figures 4-6 

 1857. Me galoma stoma digitale Gundlach, Malak. Blatter, vol. 4, p. 114. 



We have this small race from Letran and Puriales in Trinidad; 

 Soledad near Cienfuegos; Ternero; and Sierra de San Juan, Santa 

 Clara Province. The small size of this subspecies will easily differ- 

 entiate it from the rest. 



The specimen described and figured, U.S.N.M. No. 535900, comes 

 from Letran and has 5 whorls remaining. It measures: Height, 

 16.4 mm. ; greater diameter, 10.1 mm. 



FARCIMEN (FARCIMEN) ROCAI, new species 

 Plate 5, Figures 13-15 



Shell of medium size, the early whorls pale yellowish, the last chest- 

 nut-brown; peristome yellowish white. The nucleus consists of a 

 little more than one well-rounded smooth turn. The postnuclear 

 whorls are well rounded and marked by irregular, slightly retractively 

 curved, somewhat sinuous, poorly developed axial riblets, which 

 branch and anastomose in an irregular manner. In addition to this 

 there are fine irregular pittings suggesting those of F. {F.) alutaceum 

 ([Menke] Pfeiffer). Suture well constricted. Periphery well 

 rounded. Base sloping suddenly toward the obsolete carina that 

 marks the outer edge of the open umbilicus. The umbilical wall is 

 marked by the continuation of the incremental lines. Aperture cir- 

 cular; peristome double, the outer decidedly expanded, thin at the 

 edge, concave, turned up into conspicuous auricles at the posterior 

 angle and at the posterior termination of the outer peristome of the 

 inner lip. It is very narrow on the parietal wall, touching the pre- 

 ceding whorl only in the middle. Operculum typically farcimenid. 



The type, U. S. N. M. No. 535905, was collected by Father Roca at 

 Cabezadas del Caracusey, which is between Trinidad and Sancti 

 Spiritus, Santa Clara Province. It has 5.4 whorls remaining and 

 measures : Height, 17.0 mm. ; greater diameter, 15.8 mm. 



The irregular sculpture and "worm-eaten" pittings suggest a close 

 affinity with F. (F.) ahUaceum, from which it can readily be dis- 

 tinguished by the sharp-edged outer peristome, which lacks the heavy 

 thickening characteristic of F. (F.) alutaceum.. Prof. P. Guitart has 

 also collected specimens of this at Cortinas de Corengue and Veguetas 

 de Buenos Aires. 



