356 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.89 



coextensive on the outer and basal lip; on the inner lip the outer pro- 

 jects slightly beyond the inner, while at the posterior angle it is 

 developed into a very strong auricle, while the inner peristome here 

 forms a conspicuous shelf. Operculum typically annularid. 



A cotype, U.S.N.M. No. 356337, from El Jigiie de la Argolla, east of 

 Guantdnamo, Oriente Province, has 5 whorls and measures: Length, 

 10.5 mm. ; greater diameter, 14.2 mm. ; lesser diameter, 10.4 mm. 



Bermudezia, new subgenus 



Shell of turbinate outline, having both axial and spiral sculpture on 

 the spire. The axial ribs are not of two strengths, but are of uniform 

 development. Umbilicus open, forming a hollow axis. Peristome 

 simple. Operculum provided with a strong calcified lamella, which 

 is outward deflected to parallel the basal chondroid plate; the outer 

 edge of the lamella does not extend to the outer lunit of the whorls of 

 the basal plate, but it leaves a rather broad zone of the chondroid base 

 showing, as in typical Annularia. The lamella is marked by fine, 

 retractively curved threads. 



Type: Annularia {Bermudezia) hermudezi, new species. 



KEY TO THE SPECIES OF THE SUBGENUS BERMUDEZIA 



Spiral sculpture stronger than axial. 



Axial sculpture feeble berraudezi 



Axial sculpture not feeble payroll 



Spiral sculpture not stronger than axial. 



Spiral and axial sculpture both obsolete obliterata 



Spiral and axial sculpture not obsolete. 

 Axial sculpture stronger than spiral. 



Operculum with prominent lamella capestanyi 



Operculum with obsolete lamella euglypta 



ANNULARIA (BERMUDEZIA) BERMUDEZI, new species 



Plate 46, Figure 1 



Shell of turbinate outline, thin, varying from flesh to straw color in 

 ground color, marked by interrupted spiral bands of brown, which 

 are also arranged in axial series. The elements composing these bands 

 are not uniform and they sometimes produce a slightly zigzag pattern. 

 This color scheme extends over the spire and base and is present also 

 on the umbUical wall. There is a dark sutural line in the nuclear 

 whorls, while the interior of the aperture shows the external color 

 scheme through the thin wall of the shell. Nuclear whorls 2, well 

 rounded, microscopically granulose. Postnuclear whorls well rounded, 

 marked by feeble, retractively slanting, incremental lines and strong 

 rounded spiral cords, which are about as wide as the spaces that sepa- 

 rate them. Of these cords 4 occur on the first, 8 on the second, 12 on 

 the third, and 16 on the last whorl between the summit and the periph- 



