132 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



at the auricle at the posterior angle; narrowest at the parietal wall; 

 the inner is moderately exserted and reflected. Operculum typically sal- 

 lepomid. 



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

 scriptions will help to differentiate : 



KEY TO THE SUBSPECIES OF SALLBPOMA OCCIDENTALB 



Axial ribs strong cayemiticolum 



Axial ribs not strong occidentale 



SAXI^EPOaiA OCCIDENTAL.E CAYEMITICOL.UM, new subspecies 



Plate 20, Figure 1 



This subspecies comes from Grande Cayemite Island, Haiti. It differs 

 from S. o. occidentale in having the axial ribs much more strongly de- 

 veloped and in having the lamellae of the peristome much stronger. It has 

 four interrupted spiral bands of brown between the summit and the 

 periphery and three on the base and bears 136 axial ribs on the last turn 

 and three spiral threads at the outer edge of the umbilicus. 



The type (U.S.N. M. No. 380313) has 4.3 whorls remaining and meas- 

 ures: Height, 14.4 mm.; greater diameter, 9.3 mm.; lesser diameter, 

 6.9 mm. 



SAXr-EPOMA OCCIDEXTAr,E OCCIDENTALE, new subspecies 



Plate 20, Figure 2 



This subspecies C. R. Orcutt collected between Anse du Clerc and 

 Trou Bonbon, Haiti. It differs from Sallepoma occidentale cayemiticolum 

 in having the ribs almost obsolete and the spiral brown bands more 

 continuous and less broad on the spire. The subperipheral band on the 

 base is very broad and continuous. There are also two feeble color lines 

 between this and the umbilicus. The umbilical wall bears two spiral 

 threads. 



The type (U.S.N. M. No. 504059) has 115 axial ribs on the last whorl. 

 It has 4.4 whorls remaining and measures: Height, 13.7 mm.; greater 

 diameter, 7.9 mm. ; lesser diameter, 6.0 mm. 



U.S.N.M. No. 504060 contains 3 topotypes from the same source. 



SALLEPOMA PULCHELLUM, new species 



Shell ovate, pale yellow, with interrupted, almost confluent, spiral 

 bands of brown. Nuclear whorls 2, well rounded, microscopically granu- 

 lose, forming a small apex. Postnuclear whorls strongly rounded, nar- 

 rowly shouldered at the summit, and marked by rather closely spaced, 

 slightly retractively curved, axial riblets. Suture not strongly constricted. 

 Periphery well rounded. Base rather long, moderately broadly openly um- 

 bilicated, the umbilicus bearing two spiral threads. A^perture broadly 

 oval; peristome double, the outer strongly expanded at the junction of 



