232 PROCEEDTNGS OF THE NATIONAL MUSEUM Vol. 89 



columellar and parietal wall. There is a slight space between the 

 outer peristome and the preceding turn. 



The specimen described and figured, U.S.N.M. No. 367773, was 

 collected by Wright at Hermitano, between Demajagua and Guanta- 

 namo. It has 4.0 whorls remaining and measures: Length, 14.8 

 mm.; greater diameter, 7.2 mm.; lesser diameter, 6.2 mm. The thin 

 shell and the obsolete sculpture will easily distinguish this species 

 from all the other Parachrondrops. 



PARACHONDRIA (PARACHONDROPS) ERECTA ([Gundlach] Pfelffer) 



Shell elongate-conic, varying in color from flesh color to pale wax 

 yellow. The peristome may be white or yellowish. In addition to 

 this the shell is marked by interrupted spiral bands of brown, which 

 vary from strong to merely indicated. Nuclear whorls 1.5, forming 

 a blunt apex, the first half white, well rounded, smooth, except for 

 microscopic granules. The next turn is inflated, strongly rounded, 

 and marked by fine, hairlike, retractively slanting axial riblets, which 

 are about half as wide as the spaces that separate them and are much 

 closer spaced than the axial riblets of the postnuclear turns. Post- 

 nuclear whorls well rounded, marked by slender axial riblets, which 

 vary considerably in strength, spacing, and regularity in the various 

 subspecies. Some of these riblets are expanded at the summit, or 

 several of them may be fused at the summit to form large, hollow 

 cusps. The spiral threads are even more slender than the axial 

 riblets which are rendered slightly wavy, that is, articulate, by the 

 spiral tlireads. Suture well constricted. Periphery well rounded. 

 Base moderately long, well rounded, w4th a moderately wide-open 

 umbilicus, marked by the same type of sculpture as that characteriz- 

 ing the spire. Within the umbilicus the spiral sculpture becomes 

 nmch intensified, forming rather strong cords, while the axial riblets 

 become somewhat reduced. The last whorl is nearly always very 

 slightly solute behind the aperture. Aperture broadly ovate; peri- 

 stome double, the outer moderately expanded, somewhat auriculate 

 at the posterior angle, and a httle wider on the columellar margin 

 than on the outer lip. The peristome may touch the preceding 

 whorl or it may leave a slight curve between it and the preceding 

 turn. The outer peristome is marked by feeble lines of growth; the 

 inner peristome is slightly expanded and almost appressed to the 

 outer. Operculum thin, corneous, paucispiral, with excentric nucleus 

 and a heavy deposit of calcareous material, which is more or less 

 arranged in concentric ridges, feebly indicating the parachondroid 

 sculpture. 



The species is restricted to Oriente Province and breaks up into 

 a series of races, four of which we recognize here as distinct sub- 

 species. The following key will help to differentiate these: 



