HISPANIOLAN AND BAHAMAN ANNULARUDAE 65 



ately above the periphery, and the other midway between the two. The 

 base also shows two more interrupted spiral bands. These markings are 

 apparent on the inside of the aperture and on the outer peristome. 

 Nuclear whorls 2, inflated, strongly rounded and microscopically granu- 

 lose, forming a slender apex. Postnuclear whorls inflated, strongly 

 rounded, and marked by slightly retractively curved axial riblets, of 

 which 116 are present on the last turn. The spiral sculpture consists of 

 threads a little stronger than the axial riblets, of which 13 are present 

 on the last whorl. The junctions of the axial ribs and spiral threads form 

 weak nodules. Suture strongly constricted. Periphery inflated, strongly 

 rounded. Base short, inflated, strongly rounded, widely openly um- 

 bilicated, and marked by the continuation of the axial ribs, which extend 

 as feeble hairlike elements upon the umbilical wall. The spiral sculpture 

 of the base consists of 15 threads equaling those of the spire in strength, 

 and there are 11 spiral threads on the umbilical wall. In both places they 

 feebly denticulate the junction with the axial ribs. The last whorl is 

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

 double, the outer moderately flaringly expanded, thin; the inner coex- 

 tensive with the outer on the anterior portion of the outer lip and ap- 

 pressed to the outer peristome on the inner lip. Operculum typically 

 chondropomid, with subcentral nucleus. 



The type (U.S.N.M. No. 218045) was collected by Dr. W. L. Abbott 

 at Trou Bon Dieux, Port-de-Paix, Haiti. It is a complete specimen of 

 5.5 whorls and measures: Height, 11.5 mm.; greater diameter, 9.2 mm.; 

 lesser diameter, 7.0 mm. 



U.S.N.M. No. 354926 contains 29 topotypes. 



CHONDROPOMA (CHONDROPOMA) MONTALBBNSi:, new species 



Plate 12, Figure 1 



Shell elongate, ovate, straw-colored, with broad, interrupted, spiral 

 bands of brown, which in reality form a series of more or less quad- 

 rangular spots, also arranged in axial series. These markings are present 

 on both spire and base. The peristome is flesh-colored. Nuclear whorls 

 a little more than 2, forming a slender spire, well rounded, smooth. The 

 postnuclear whorls are somewhat inflated, well rounded, narrowly 

 shouldered at the summit, and marked by slender, retractively curved 

 axial riblets, which are separated by spaces onl}^ a trifle wider than the 

 riblets and spiral threads a trifle wider spaced than the axial riblets. The 

 junctions of the two form well-rounded nodules, while the spaces in- 

 closed between them are rectangular pits having their long axis coincid- 

 ing with the axial sculpture. The axial riblets render the summit of 

 the whorls slightly crenulated. The entire surface of the shell has the 

 aspect of a fine file. Suture narrowly channeled. The periphery of the 

 last whorl is inflated, well rounded. The base is moderately long, very 

 inflated, strongly rounded and marked by the same sculpture that char- 



