HISPANIOLAN AND BAHAMAN ANNULARIIDAE 197 



rounded, finely granulosa, forming a mammillated, almost truncated, 

 apex. The basal portion of these nuclear whorls in some instances bears 

 a brown zone, which is lost in the later turns. The early portion of the 

 succeeding whorls shows indications of closely spaced, retractively slant- 

 ing hairlines, which in turn give way to the postnuclear sculpture. The 

 postnuclear whorls are moderately well rounded with the axial riblets, 

 as a rule, almost obsolete, and the spiral threads poorly produced. In 

 spite of its poor development of the axial riblets they form tufts at the 

 summit. On the last whorl the sculpture usually becomes a little stronger 

 and shows the pitting between the spiral elements and the axial riblets. 

 Suture moderately constricted; periphery well rounded. The base is 

 marked like the spire narrowly openly umbilicated. Aperture broadly 

 oval. Peristome double, slightly auriculate at the posterior angle. Both 

 the inner and outer are moderately broadly expanded and reflected and 

 adnate to each other. The last whorl is adnate to the preceding turn. 

 Operculum typically chondropsid. 



The specimen described and figured (U.S.N.M. No. 536683), one of 

 6 from Inagua, has 4.4 whorls remaining and measures : Length, 

 7.5 mm. ; greater diameter, 3.7 mm. ; lesser diameter, 3.0 mm. 



Another specimen (U.S.N.M. No. 355932), from the Prime Collec- 

 tion, has a little more than 4 whorls remaining and measures : Length, 

 9.5 mm.; greater diameter, 4.5 mm.; lesser diameter, 3.1 mm. 



U.S.N.M. No. 536679 contains i specimen from the Bland Collec- 

 tion from Great Inagua. 



U.S.N.M. No. 57606 contains 3 specimens (types of Rhytidopoma eu- 

 ploca Dall) from Great Inagua. 



U.S.N.M. No. 536680 contains a paratype of Chondropoma russelli 

 Clench from Great Inagua. 



U.S.N.M. No. 391693 contains 40 specimens collected by Bartsch at 

 North East Point, Great Inagua. 



U.S.N.M. No. 392287 contains i specimen from the north side of 

 Ocean Bight, Great Inagua. 



U.S.N.M. No. 392156 contains 7 specimens from Jackline, Great In- 

 agua, collected by Bartsch. 



U.S.N.M. No. 392150 contains 70 specimens collected by Bartsch at 

 lake side at Maroon Hill, Great Inagua. 



U.S.N.M. No. 390280 contains 139 specimens collected by Bartsch 

 on the north point of Ocean Bight, Great Inagua. 



U.S.N.M. No. 392181 contains 175 specimens collected by Bartsch on 

 the west side of lake about i mile from Maroon Hill, Great Inagua. 



U.S.N.M. No. 390298 contains 5 specimens collected by Bartsch on 

 the east side of North West Point, Great Inagua. 



U.S.N.M. No. 394123 contains 7 specimens from Carmichael Point, 

 Great Inagua. 



U.S.N.M. No. 536681 contains 4 specimens from the Ford Collection 

 from Great Inagua. 



