CUBAN SUBFAMILY CHONDROPOMINAE — ^TORRE AND BARTSCH 315 

 KEY TO THE SPECIES OF SUBGENUS CHONDROTHYRELLA 



Axial sculpture very fine and closely spaced pudica 



Axial sculpture only moderately fine and not closely spaced. 



Umbilicus open or closed ; tip cinnabar red perturbata 



Umbilicus closed ; tip not cinnabar red. 



Shell straw-color excisa 



Shell not straw-color. 

 Shell brown. 



Columella with a red spot ottonis 



Columella without a red spot. 



Shell broadly ovate , cuzcoensis 



Shell ovate , petricosa 



CHONDROTHYRELLA (CHONDROTHYRELLA) PUDICA (Orbigny) 

 Plate 24, Figxjbes 3, 4 



1842. Cyclostoma pudicum Orbiony, in Sagra's Histoire physique, politique et 

 naturelle de I'Ue de Cuba, vol. 1, pp. 259-260, pi. 22, fig. 6, 7, 8", not 

 8 or 8'. 



1851. Cyclostoma sericatvm Morelet, Testacea novissima insulae Cubanae et 

 Americae Centralis, pt. 2, p. 20. 



Shell broadly ovate, almost turbinate, varying in general tone 

 of color from brown to plum color. Nuclear whorls flesh-color, with 

 a dark point at the tip, gradually turning darker toward the end of 

 the nuclear spire. The peristome is yellowish white. Nuclear whorls 

 2.2, smooth except the last portion of the last turn, which shows the 

 beginning of the postnuclear sculpture. Postnuclear whorls inflated, 

 strongly rounded, marked by retractively slanting, slender, sub- 

 lamellar axial riblets, which are more distantly spaced on the early 

 whorls than on the last, where they are rather crowded. The spiral 

 sculpture consists of threads, which are a little stronger than the 

 axial riblets. The intersections of the axial riblets and the spiral 

 threads form weak elongated nodules having their long axis parallel 

 with the axial sculpture. Suture strongly constricted. Periphery 

 of the last whorl inflated, strongly rounded. Base short, inflated, 

 strongly rounded with a rather well-impressed umbilical region, 

 which is marked by the continuations of the axial riblets and spiral 

 cords. The latter are a trifle stronger on the base than on the poste- 

 rior portion of the whorl. Aperture large, very broadly oval; 

 peristome double, the outer broadly expanded, not quite all in one 

 plane, marked by concentric lines of growth and radiating corru- 

 gations ; the outer peristome is deeply notched a little anterior to the 

 middle on the inner lip; the portion posterior to this notch is re- 

 flected over the umbilical area as a broad callus completely covering 

 the umbilicus; on the parietal wall the outer peristome is reflected 

 over the preceding turn and adnate to it; the inner scarcely at all 



