64 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



outer is broadly expanded on the basal and outer lip and narrowly so 

 on the parietal wall, tapering toward this on the columella. The outer 

 peristome is fluted at the edge and marked by feeble concentric lamellae ; 

 it tends slightly to an auriculation at the posterior angle. The inner 

 peristome is exserted, slightly expanded, and about one-half as wide as 

 the outer. The operculum is paucispiral with subcentral nucleus and has 

 a thin deposit of calcareous granules on the outside. 



The type (U.S.N.M. No. 471958) and 71 topotypes (U.S.N.M. No. 

 425512) were collected by Dr. W. L. Abbott from soil at the foot of an 

 inland elevated coral cliff on the north side of Tortue Island, Haiti. The 

 type has 4.5 whorls remaining and measures : Length, 9.7 mm. ; greater 

 diameter, 5.4 mm. ; lesser diameter, 4.6 mm. 



CHONDBOPOMA (CHONDBOPOMA) RABELENSE, new species 



Plate 13, Figure 2 



Shell of turbinid outline, pale yellow, with faint interrupted spiral 

 bands, which are merely indicated, of which two are present on the spire 

 and two on the base. Nuclear whorls almost 2, inflated, strongly rounded, 

 forming a small, rather low, broad apex. Postnuclear whorls decidedly 

 inflated, strongly rounded, and marked by retractively curved, axial, 

 slender, ribs, of which 82 are present on the last turn. The spiral sculp- 

 ture consists of threads about as strong as the axial riblets, of which 13 

 are present between the summit and the periphery. The junctions of the 

 axial ribs and spiral threads form small sharp cusps. Suture slightly 

 channeled. Periphery inflated, strongly rounded. Base short, inflated, 

 strongly rounded, openly umbilicated, and marked by the continuation 

 of the axial ribs, which extend as slender hairlines on the umbilical wall 

 and spiral threads, of which 11 are present on the base and 14 on the 

 umbilical wall. On the base the junctions of the axial ribs and spiral 

 threads form slender spines, which is not the case on the umbilical wall. 

 Last whorl solute for about one-sixth of a turn. Aperture broadly oval; 

 peristome double, the outer narrowly expanded all around; the inner 

 rather strong, exserted, reflected, and appressed to the outer, leaving the 

 outer peristome projecting but slightly beyond the inner. Operculum 

 typically chondropomid with subcentral nucleus. 



The type (U.S.N.M. No. 503995) was collected by Mr. and Mrs. E. C. 

 Leonard between Jean Rabel and Le Mole, Haiti. It has 5 whorls and 

 measures: Height, 11. i mm.; greater diameter, 9.2 mm.; lesser diameter, 

 8.0 mm. 



U.S.N.M. No. 503996 contains 105 topotypes. 



CHONDROPOMA (CHONDROPOMA) ABBOTTI, new species 



Plate 13, Figure 1 



Shell thin, of turbinid outline, pale yellow, with almost continuous 

 bands of brown, of which a narrower one is at the summit, one immedi- 



