HISPANIOLAN AND BAHAMAN ANNULARIIDAE 29 



CHONDROPOMA (CHONDBOPOftETDM) SWIFTII AZUEN8E, new subspecies 



Plate 4, Figure 6 



1854. Cyclostoma semilabre Pfeiffer, Martini-Chemnitz Conchylien Cabinet, ed. 

 2, vol. 1, sect. 19, pi. 49, fig. 20. 



This race has much more inflated whorls than the rest. The shell is 

 of more broadly ovate outline and lacks the brown spiral banding. 



The type (U.S.N.M. No. 493298) comes from the Cuming Collection, 

 which means that it was collected by Salle. It has 4.4 whorls remaining 

 and measures: Length, 19 mm.; greater diameter, 10.8 mm.; lesser 

 diameter, 9.5 mm. 



U.S.N.M. No. 354952 contains 2 topotypes from the same source. 



U.S.N.M. No. 354958 contains i specimen collected by Dr. Newcomb 

 at Azua, Dominican Republic. 



CHONDBOPOMA (CHONDROPOMIUM) VEBMICUI/ATUM, new species 



Shell elongate-conic, ground color varying from plain flesh-colored 

 through pale brown to almost chestnut-brown, marked with a pro- 

 nounced, interrupted, rather broad, peripheral band of brown and on 

 the base with one or more feeble interrupted spiral lines of the same 

 color; in addition to these spiral bands, fine obscure vermiculations or 

 fulgurations of brown are present on the spire. Nuclear whorls 2, well 

 rounded, forming an almost truncated apex; the first smooth, the last 

 one with faint indications of axial riblets. The postnuclear whorls are 

 well rounded, very narrowly shouldered at the summit, almost appressed, 

 marked by numerous closely spaced, low, rounded, retractively slanting, 

 axial riblets which are separated by mere impressed lines only. These 

 riblets extend strongly to the summit, which they render decidedly cren- 

 ulated. Periphery of the last whorl well rounded. Base very short, 

 strongly rounded, openly umbilicated, marked by the continuations of 

 the axial ribs, which extend into the umbilicus, and two to five strong 

 spiral folds on the umbilical wall. About one-tenth of the last volution 

 is solute, the summit here forming a strong carina; the outside of the 

 parietal wall is marked by the continuations of the axial ribs, which here 

 are mere strong lines of growth. Aperture very broadly pyriform; 

 posterior angle acute; peristome expanded and reflected. 



The species apparently ranges from southwest Barahona Province 

 eastward to Santo Domingo City. 



Its slender form and vermiculated markings differentiate this species 

 from the adjacent Chondropoma (Chondropomium) swiftii weinlandi. 



KEY TO THE SUBSPECIES OF CHONDROPOMA (CHONDROPOMIUM) 

 VERMICULATUM 



Shell chestnut-brown nubUum 



Shell not chestnut-brown. 



Shell fulvous sallei 



Shell flesh-colored. 



Decollated shell elongate-conic vermiculatum 



Decollated shell elongate-ovate domingense 



