CUBAN SUBFAMILY CHONDROPOMINAE — TORRE AND BARTSCH 245 



Axial sculpture sublamellar deceptor 



Outer peristome not broadly expanded hamlini 



TURRITHYRA (TURRITHYRA) MENDAX, new species 



Plate 14, Figure 14 



Shell elong-ate-turreted, white or yello^Y. Postnii clear whorls some- 

 what intlated, strongly rounded, marked bj numerous retractively 

 curved, slender, threadlike axial ribs, which extend undiminished 

 across the periphery and base of the last whorl. The spiral sculpture 

 consists also of slender threads, which are a little stronger than the 

 axial ; the combination of these elements lends the surface a fenestrated 

 pattern. In the moderately open umbilicus the spiral threads are even 

 stronger than those of the spire. Suture strongly constricted. Base 

 inflated, well rounded. Aperture very broadly ovate ; peristome dou- 

 ble, the outer very broadly expanded and reflected, radially fluted and 

 marked by concentric lines of growth; the inner only moderately 

 expanded and reflected and adnate to the outer. Breathing pore at the 

 posterior angle. Operculum thin, with a rather heavy deposit of 

 granules which lend it a retractively fluted aspect. 



The type, U.S.N.M. no. 4G8728, comes from the Cafetal de la Peni- 

 tencia, Vinales. It has 4.5 whorls remaining and measures : Length, 

 21.4 mm; greater diameter, 12.5 mm; lesser diameter, 8.8 mm. 



TURRITHYRA (TURRITHYRA) CANALICULATA (Gundlach) Pfeificr 



Shell elongate-turreted, red or reddish, with or without darker axial 

 streaks and conspicuous or inconspicuous interrupted spiral bands of 

 brown. Nuclear whorls smooth, excepting the last part of the last turn, 

 which shows a few strong incremental lines. Postnuclear whorls in- 

 flated, strongly rounded, and marked by threadlike axial riblets and a 

 little finer spiral threads, except on the umbilicus, where they are much 

 stronger. The axial threads pass over the inflated, well-rounded pe- 

 riphery and base into the open umbilicus. Suture well constricted. 

 Aperture broadly ovate ; peristome double, the outer broadly expanded, 

 somewhat auriculated at the posterior angle, radially fluted and 

 marked by concentric lines of growth ; the inner less widely expanded, 

 reflected and adnate to the outer. Breathing pore on the parietal wall 

 near the posterior angle of the aperture. Operculum covered on the 

 inner two-thirds of its turn with a heavy granular, calcareous deposit 

 in a retractively fluted pattern. 



This species has several races, all of which cluster about Pan de 

 Guajaibon. 



Distribution of the subspecies of T. {T .) candl'iculata is shown in 

 fififure 84. 



