CUBAN ANNULARIIDAE TORRE AND BARTSCH 199 



Axial ribs not stout and coarse. 



Inner lip of outer peristome flexed or notched. 

 Shell elongate-ovate. 



Inner lip of outer peristome flexed in the 



middle cvinaguae 



Inner lip of outer peristome notched in the 



middle judasense 



Shell not elongate-ovate. 

 Shell ovate-conic. 



Tufts at the summit regular and strong__ sanchezl 



Tufts at the summit irregular and feeble sosai 



Shell not ovate-conic. 

 Shell ovate. 



Umbilicus very wide litorale 



Umbilicus only moderately wide berryi 



Inner lip of outer peristome not flexed or notched tersum 



Last whorl not adnate to the preceding turn, but solute. 



Outer peristome of inner lip flaringly expanded apertum. 



■ Outer peristome of inner lip not flaringly expanded. 



Outer peristome of inner lip reflected backward deviatum 



Outer peristome of inner lip not reflected backward, paredonense 



OPISTHOSIPHON (CUBIT ASIPHONA) POEYI, new species 



Plate 15, Figure 8 



Shell moderately large, ovate, varying in color from pale straw 

 color to chestnut-brown, unicolor or interruptedly spirally banded. 

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

 lose, forming a rather blunt apex. Postnuclear whorls inflated, 

 strongly rounded, marked by numerous, closely spaced, slender axial 

 riblets which are as wide as or a little narrower than the spaces that 

 separate them. In the type 62 of these ribs are present on the first 

 of the remaining turns and 255 are on the last whorl. Groups of these 

 riblets, which are somewhat irregularly spaced, are gathered into 

 hollow tufts at the summit; the riblets between the tufts terminate 

 normally. Suture well constricted. Periphery inflated, strongly 

 rounded. Base short, well rounded, marked by the continuation of 

 the axial ribs. Aperture broadly oval; peristome double, the inner 

 somewhat exserted and reflected, particularly so on the basal lip; on 

 the parietal and outer lip it projects materially. The outer peristome 

 forms an auricle at the posterior angle; it is narrow on the outer and 

 basal lip and it becomes expanded on the inner lip and very widely 

 expanded on the parietal wall. It is notched on the middle of the 

 inner lip, and the broad flap posterior to the notch covers the umbilicus 

 and part of the base. On the parietal wall the outer peristome ex- 

 pands materially over the preceding whorl, to which it is adnate. 

 Operculum typically opisthosiphonid. 



