344 PROCEEDINGS OF THE NATIONAL MUSEUM Vol. 89 



ANNULARIA (SUBANNULARIA) STORCHI (Pfeiffer) 



Shell very elongate-conic, varying in color from flesh color to pale 

 brown. Nuclear whorls 2, inflated, strongly rounded, smooth, form- 

 ing a mammillated apex. Postnuclear whorls inflated, strongly 

 rounded, marked by retractively slanting axial riblets, which vary in 

 spacing from closely approximated to a separation by a space about 

 the width of the riblet in the different subspecies. These riblets may 

 become expanded at the summit to form hollow blisterlike denticles; 

 at times 2 or more of these may become fused in this effort. At 

 regular intervals these riblets bear slender nodules, which give the 

 whorls the appearance of having spiral threads but which are not 

 present in the intercostal spaces. Suture strongly constricted. 

 Periphery mflated, strongly rounded. Base broadly, openly lunbili- 

 cated, marked by the continuation of the nodulose axial riblets. The 

 last whorl is solute for almost half a turn. Aperture very broadly 

 oval; peristome double, the inner is moderately exserted and scarcely 

 reflected; the outer moderately, broadly expanded, usually auriculated 

 at the posterior angle, where the auricle is bent back in some of the 

 subspecies to almost form a channel; the outer lip is a little narrower 

 on the parietal wall than on the rest of the peristome, and is marked 

 by a series of concentric lameUae. Operculum typically annularid. 



This species occupies the region about Cayo del Key, Mayari, 

 Oriente Province, where it appears to break up into two subspecies, 

 characterized here. 



KEY TO THE SUBSPECIES OF ANNULARIA (SUBANNULARIA) STORCHI 



Axial ribs strong and rather stout nipensis 



Axial ribs not strong and rather fine storchi 



ANNULARIA (SUBANNULARIA) STORCHI NIPENSIS. new subspecies 



Plate 39, Figure 8 



This subspecies comes from the Farallones de Nipe, near Sabanilla. 

 It differs from the typical race in having the ribs much larger, few^er, 

 and a little more distantly spaced, and in having the denticles at the 

 summit much more pronounced. 



The type, U.S.N.M. No. 355883, has a little more than 5.0 whorls 

 remaining and measures: Length, 9.3 mm.; greater diameter, 4.1 

 mm.; lesser diameter, 3.3 mm. 



ANNULARIA (SUBANNULARIA) STORCHI STORCHI (Pfeiffer) 



Plate 39, Figure 10 



1861. Choanopoma storchi Pfeiffer, Malakozool. Blatter, vol. 8, pp. 222-223. 

 1920. Annularia (Annularia) storchi Henderson and Bartsch, Proc. U. S. Nat. 

 Mus.. vol. 58, p. 73. 



