CUBAN ANNUIjARIIDAE — ^TORRE AND BARTSCH 273 



The type, U.S.N.M. No. 493474, comes from the Vereda del Tele- 

 grafo. Sierra del Chorrillo. It has 4.4 whorls remaming and measures: 

 Length, 11.0 mm.; greater diameter, 7.0 mm.; lesser diameter, 5.6 

 mm. 



This species is easily distinguished from all the other Aguayotu- 

 doras by its granulose sculpture. 



TUDORA (AGUAYOTUDOKA) AGUAYOI, new species 



Shell varying in shape from elongate-ovate to broadly ovate and 

 in color from horn yellow to pale chestnut-brown, unicolor, or inter- 

 ruptedly spirally banded. Nuclear whorls 2, strongly rounded, 

 microscopically granulose. Postnuclear whorls decidedly inflated, 

 strongly rounded, marked by axial ribs which vary materially in 

 strength; some are lamellar, while between them 1 or 2 finer threads 

 may be present. The axial ribs are expanded into auricles at the 

 summit and are thickened at the periphery, where in the early 

 whorl they form interlocldng elements. The axial ribs may or may not 

 be nodulose, depending upon the race in question. Suture strongly 

 constricted. Periphery inflated, well rounded. Base short, inflated, 

 strongly rounded, marked by the continuation of the axial ribs, and 

 by an indication of 1 or 2 feeble spiral threads adjacent to the open 

 umbilicus. The umbihcal wall is marked by the continuation of the 

 axial ribs and by spiral threads, wliich render the ribs nodulose. 

 Last whorl adnate or slightly solute. Aperture very broadly oval, 

 with a decided auricle at the posterior angle; peristome simple. A 

 shelf, which almost suggests a double peristome, limits the peristome 

 at the posterior angle. 



This species appears to be restricted to Camagiiey Province. 



We are recognizing 3 subspecies, which the following key and de- 

 scriptions will help to differentiate: 



KEY TO THE SUBSPECIES OF TUDORA (AGUAYOTUDORA) AGUAYOI 



Shell broadly ovate aguayoi 



Shell elongate-ovate. 



Axial ribs distantly spaced guaicanamarensis 



Axial ribs closely spaced najazaensis 



TUDORA (AGUAYOTUDORA) AGUAYOI AGUAYOI, new subspecies 



Plate 27, Figure 7 



This subspecies comes from Guaicanamar. We have seen it also 

 from Palomar de San Jose, Guaicanamar, Camagiiey Province. It is 

 easily distinguished from the other two by its broadly ovate form and 

 its slightly more open umbilicus. 



The type, U.S.N.M. No. 493476, comes from the Sierra de Guai- 

 canamar. It has 6.6 whorls remaining and measures: Length, 13.7 

 mm.; greater diameter, 8.2 mm.; lesser diameter, 6.8 mm. 



