188 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



CHONDBOPOMA (LEVIPO»L\) INAGUATIVCM PETEBSI, new subspecies 



Plate 32, Figure 4 



Shell like typical Chondropoma (Leviponta) inaguativum inaguativum 

 but having the summit of the whorls almost appressed and the denticula- 

 tions much less strongly developed and more distantly spaced. 



The type (U.S.N.M. No. 474153) was collected by Bartsch at North 

 Point of Ocean Bight, Great Inagua Island. It has 3.4 whorls remain- 

 ing and measures: Length, 11. 5 mm.; greater diameter, 6.0 mm.; lesser 

 diameter, 5.2 mm. 



U.S.N.M. No. 390285 contains 13 topotypes from the same source. 



U.S.N.M. No. 392164 contains 7 specimens collected by Bartsch on 

 the west coast south of North East Point, east of the salt lagoon at a 

 deserted house. 



U.S.N.M. No. 391071 contains i specimen collected by Bartsch at 

 North East Point, Great Inagua. 



U.S.N.M. No. 392171 contains 3 specimens collected by Bartsch at 

 the embayment of Ocean Bight, Great Inagua. 



U.S.N.M. No. 393354 contains 2 specimens collected by Bartsch half- 

 way between Palmetto and Carmichael Points, Great Inagua. 



U.S.N.M. No. 390311 contains i specimen collected by Bartsch on 

 the east side of North West Point, Great Inagua. 



CHONDBOPOMA (LEVIPOMA) INAGrEI.HJM, new species 



Plate 32, Figure 1 



Shell similar in outline, absence of axial and spiral sculpture, color 

 pattern, and operculum to Chondropoma (Levipoma) inaguativum but 

 with the summits of the whorls not shouldered but almost appressed. 

 The suture, therefore, is not channeled. There is also a complete absence 

 of crenulations at the summit of the whorls. 



The type (U.S.N.M. No. 474154) comes from Northwest Point, 

 Little Inagua, collected by Bartsch. It has 4.3 whorls remaining and 

 measures : Length, 12.8 mm. ; greater diameter, 6.5 mm. ; lesser diame- 

 ter, 5.2 mm. 



U.S.N.M. No. 390948 contains 87 topotypes from the same source. 



Chondrops, new subgenus 



Shell with the axial ribs gathered into tufts at the summit as in 

 Chondropomorus. The mollusk decollates the greater part of the spire 

 leaving only four to four and one-half whorls remaining, which form 

 a subcylindric shell. The decollated part forms a narrow elongate-conic 

 spire. Operculum covered by a very thick callus. 



The group, as far as shape and sculpture of the early whorls are con- 

 cerned, recalls Turriponm Torre and Bartsch, with its unique species 



