HISPANIOLAN AND BAHAMAN ANNULARIIDAE 187 



sculpture also absent or reduced to mere denticulations at the summit 

 of the whorls. Operculum typically chondropomoid, with the merest 

 film of granular calcareous deposit. 



Type species: Chondropoma (Levipoma) inaguativum, new species. 



KEY TO THE SPECIES OF SUBGENUS LEVIPOMA 



Suture denticulate inaguativum 



Suture not denticulate inaguellum 



CHONDROPOMA (LEVIPOMA) INAGUATIVUM, new species 



Shell elongate-conic, pale horn-colored, the postnuclear turns marked 

 with elongate spots of brown, whose long axis is spiral. These spots are 

 also disposed in axial series. Nuclear whorls 2, well rounded, marked 

 only by incremental lines. Postnuclear whorls well rounded, narrowly 

 shouldered at the summit, and finely closely crenulated at the extreme 

 summit. The axial sculpture of the spire is reduced to mere incremental 

 lines, and no spiral sculpture is present. Periphery strongly rounded; 

 base strongly rounded, narrowly openly umbilicated, marked only by in- 

 cremental Hues even in the umbilicus. Last whorl solute for about one- 

 fifth of a turn, carinated on the outside at the posterior angle of the 

 aperture. Aperture obliquely oval, simple, thickened at the edge of the 

 peristome. Operculum typically chondropomoid. 



This species appears confined to Inagua Island, where it breaks up 

 into two subspecies, which the following key will help to differentiate : 



KEY TO THE SUBSPECIES OF CHONDROPOMA (LEVIPOMA) INAGUATIVUM 



Denticulation at summit strongly developed and closely spaced., inaguativum 

 Denticulation at summit feebly developed and distantly spaced petersi 



CHONDBOPOMA (LEVIPOMA) INAGUATIVUM INAGUATIVUM, new subspecies 



Plate 32, Figure 6 



This race has the denticles at the summit strongly developed and 

 closely spaced. I found it in a number of places in the interior of the 

 island. 



The type (U.S.N.M. No. 474152) was collected by Bartsch on the 

 flats west of Salt Pond Hill, Great Inagua. It is a complete specimen 

 having almost 7 whorls and measuring: Length, 13.0 mm.; greater di- 

 ameter, 5.9 mm. ; lesser diameter, 5.2 mm. 



U.S.N.M. No. 391703 contains 55 topotypes from the same source. 



U.S.N.M. No. 390687 contains 9 specimens from the flat south of Salt 

 Pond Hill, Great Inagua, collected by Bartsch. 



U.S.N.M. No. 390253 contains 33 specimens collected by Bartsch 

 at Salt Pond Hill, Great Inagua. 



U.S.N.M. No. 390336 contains 126 specimens collected by Bartsch 

 from the lake side at Maroon Hill, Great Inagua. 



