HISPANIOLAN AND BAHAMAN ANNULARHDAE 59 



more or less rectangular pits. The summit of the whorls is rendered 

 crenulate by the slight thickening of the ribs at this place. Suture 

 slightly channeled. The periphery is inflated and strongly rounded. The 

 base is short, decidedly inflated and very strongly rounded, and marked 

 by the feeble continuation of the axial riblets, which here are more or 

 less reduced to almost lines of growth, and spiral threads, which are of 

 about the same strength, or almost so, as those on the spire. The um- 

 bilicus is moderately open and marked by feeble spiral threads and incre- 

 mental lines. Aperture broadly oval, oblique ; peristome double, decidedly 

 thickened; the outer m^oderately broadly expanded, more so on the 

 basal portion of the inner lip than on the rest, forming a weak auricle 

 at the posterior angle. The inner peristome is also thickened, appressed 

 and adnate to the outer. Operculum thin, corneous, paucispiral, and 

 covered with a thin granular deposit. 



This species, which suggests Chondropoma (Chondropoma) semilahris, 

 is at once distinguished from this by its much smaller size, heavier shell, 

 decidedly more inflated whorls, and much stronger thickened peristome. 



I am recognizing two subspecies, which the following key and de- 

 scriptions will help to differentiate : 



KEY TO THE SUBSPECIES OF CHONDROPOMA (CHONDROPOMA) BLANCHARDI 



Shell elongate-ovate blanchardi 



Shell broadly ovate marci 



CHONDROPOMA (CHONDROPOMA) BI>ANCHARDI BL,ANCHARDI, new subspecies 



Plate 8, Figure 2 



This, the smaller of the two races here recognized, we gathered at 

 Petionville in the hills south of the Cul-de-Sac, above Port-au-Prince. 

 It is much more slender than Chondropoma (Chondropoma) blanchardi 

 marci and has the last whorl more elongated and a proportionately smaller 

 aperture. 



The type (U.S.N.M. No. 493305) has 4.2 whorls remaining and 

 measures : Length, 11.6 mm. ; greater diameter, 6.7 mm. ; lesser diameter, 

 5,8 mm. 



U.S.N.M. No. 493306 contains 5 topotypes from the same source. 



CHONDROPOMA (CHONDROPOMA) BL,ANCHARDI MARCI, new gabspecies 



Plate 8, Figure 1 



This race we collected on the limestone cliffs bordering the railway 

 a little south of St. Marc, Haiti. It is readily distinguished from Chon- 

 dropoma (Chondropoma) blanchardi blanchardi by its much more obese 

 form and much broader umbilicus and proportionately larger aperture. 



The type (U.S.N.M. No. 493307) has 4.2 whorls remaining and 

 measures: Length, 12.9 mm.; greater diameter, 8.7 mm.; lesser diameter, 

 6.7 mm. 



U.S.N.M. No. 493308 contains 6 topotypes from the same source. 



