HISPANIOLAN AND BAHAMAN ANNULARIIDAE 35 



CHONDB.OPOMA (CHONDROPOMTUM) GIMBIENSE GIMBIEINSE, new subspecies 



Plate 6, Figure 3 



This subspecies was collected by C. R. Orcutt on the east bank of 

 the Riviere Gimbi in the vicinity of Saltrou. This has a small, ovate, 

 dark shell with rather conspicuous interrupted spiral bands of brown 

 and axial light zones between these bands, which give the shell a de- 

 cidedly watered-silk effect. The aperture is broadly oval and pale chest- 

 nut-brown within, which is also the color of the peristome. Its small 

 size will at once distinguish it from the other subspecies. 



The type (U.S.N.M. No. 471935) is a complete specimen having 5.5 

 whorls and measures: Length, 10.2 mm.; greater diameter, 6.3 mm.; 

 lesser diameter, 4.9 mm. 



U.S.N.M. No. 402015 contains 9 topotypes from the same source. 



CHONDBOPOMA (CHONDROPOMIUM) EU8ABCUM (Pfeiffer) 



Shell small, broadly ovate-conic, and usually flesh-colored, with or 

 without interrupted spiral bands of brown; the early postnuclear whorls 

 always have the anterior portion brown. The postnuclear whorls are 

 well rounded, with the summit narrowly shouldered, marked by numer- 

 ous, closely spaced, slightly retractively curved axial riblets, which are 

 strongest at the summit and render this crenulated. Periphery somewhat 

 inflated and strongly rounded. Base short, well rounded, and marked by 

 the continuations of the axial riblets. Umbilicus moderately broad, 

 marked within by weak spiral threads. The last whorl is scarcely ever 

 solute or, if so, only very narrowly so. Aperture broadly pyriform, with 

 the posterior angle almost acute, narrowly auriculated ; peristome double, 

 the inner almost coextensive with the outer, from which it is only 

 slightly differentiated; the doubling is best seen on the slight auricle of 

 the posterior angle of the aperture. Outer lip only slightly expanded 

 and reflected; inner lip even less so. Operculum paucispiral with ex- 

 centric nucleus ; the last turn usually with scattered calcareous granules. 



The species is known only from the Dominican Republic, from where 

 I recognize three subspecies. 



KEY TO THE SUBSPECIES OF CHONDROPOMA (CHONDROPOMIUM) BUSARCUM 



Shell more than 15 mm in length puertoplatense 



Shell less than 12 mm in length. 



Axial ribs rather strong and distantly spaced eusarcum 



Axial ribs rather fine and closely spaced catalinitense 



CHONDROPOMA (CHONDBOPOBnUM) EUSARCUM PUERTOPLATENSE, 



new subspecies 



Plate 5, Figure 2 

 This subspecies comes from Puerto Plata, Dominican Republic. It 

 was collected by Prime. It differs from typical Chondropoma (Chondro- 

 pomium) eusarcum eusarcum in being larger and having the ribs much 

 more slender and closely spaced. 



