HISPANIOLAN AND BAHAMAN ANNULARIIDAE 133 



the inner and basal lip, forming a decided auricle at the posterior angle; 

 it is narrow on the parietal wall, which is adnate to the preceding turn 

 and also on the outer lip, and is marked by concentric laminae ; the inner 

 is moderately exserted and reflected. Operculum typically sallepomid. 



The species breaks up into two subspecies, which the following de- 

 scriptions and key will help to differentiate : 



KEY TO THE SUBSPECIES OP SALLEPOMA PULCHELLUM 



Shell large and stout pulchellum 



Shell small and slender bonbonense 



SALL-EPOMA PUL,CHEL,L,TJM PUL,CHEI,L,UM, new subspecies 



Plate 20, Figure 5 



This subspecies, which ranges from Jeremie to Trou Bonbon, Haiti, 

 differs from 6^. p. bonbonense in having the axial ribs much narrower 

 and more strongly developed. Of these, 155 are present on the last 

 whorl in the type; they are closely spaced and separated by mere im- 

 pressed lines. 



The type (U.S.N.M. No. 504061) is a complete specimen and comes 

 from Jeremie. It has 7.5 whorls and measures: Height, 22.3 mm.; 

 greater diameter, 11.2 mm.; lesser diameter, 8.9 mm. 



U.S.N.M. No. 504062 contains 55 topotypes from the same source. 



U.S.N.M. No. 420660 contains 13 specimens collected by Orcutt east 

 of Trou Bonbon. 



U.S.N.M. No. 425381 contains 65 specimens collected by Orcutt 

 between Anse du Clerc and Trou Bonbon. 



SAl.L,EPOMA PUr,CHEr,r,UM BONBONENSE, new sabspecies 



Plate 20, Figure 6 



This subspecies ranges from Abricots to Trou Bonbon, Haiti. It 

 differs from v9. p. pulchellum in being smaller and in having the ribs 

 much more distantly spaced and much less strongly developed. 



The type (U.S.N.M. No. 504065) was taken between Anse du Clerc 

 and Trou Bonbon and has a little more than 4 whorls remaining, which 

 bear 113 axial ribs on the last whorl. It measures: Height, 17.0 mm.; 

 greater diameter, 11.6 mm.; lesser diameter, 7.9 mm. 



U.S.N.M. No. 401947 contains 40 topotypes froni the same source. 



U.S.N.M. No. 401719 contains 4 specimens collected by Orcutt east of 

 the Riviere des Abricots on a limestone hill near the mouth of Trou 

 Sardines. 



SAXiLEPOMA MUTABILE, new species 



Plate 22 



Shell varying from elongate-ovate to elongate-conic in outline. In 

 color it may be white, pale yellow, pale orange, or even purplish brown ; 



