CUBAN ANNULARiroAE TORRE AND BARTSCH 323 



The type, U.S.N.M. No. 391832, comes from Cachiboca Cay. It 

 has 3.9 whorls remaining and measm-es: Length, 10.0 mm.; greater 

 diameter, 5.4 mm.; lesser diameter, 4.7 mm. 



Subgenus Annularita Henderson and Bartsch 

 1920. Annularita Henderson and Bartsch, Proc. U. S. Nat. Mus., vol. 5S, p. 73. 



Shell ovate-conic, marked by both axial riblets and spiral threads. 

 Peristome not expanded into a broad thin disk, but much thickened, 

 slightly flattening to a thin edge. Operculum typically annularid. 



Type: Annularia {Annularita) majuscula (Morelet). 



ANNULARIA (ANNULARITA) MAJUSCULA (Morelet) 



Shell very large, elongate-ovate, varying in color from white 

 through flesh color to pale yellow to buff; unicolor, or banded with 

 interrupted spiral bands of brown, zigzag or an'ow-shaped markings, 

 depending upon the race to which the subspecies in question may 

 belong. The base is as variable in coloring as the spire; the peristome 

 as a rule is a little paler than the rest of the shell, unicolor, or rayed. 

 Nuclear whorls almost 2, smooth, well rounded, forming a small 

 apex. Postnuclear whorls well rounded, marked by almost vertical 

 or slightly retractively slanting axial riblets, which vary greatly in 

 strength in the different races. Some of these riblets become pro- 

 jected and fused at quite regular intervals at the summit, lending to 

 the summit a strongly denticulated aspect. The strength of this 

 denticulation likewise varies materially in the dift'erent subspecies. 

 The spiral sculpture consists of threads, which also vary from almost 

 obsolete to quite strong in the various races. Periphery of the last 

 whorl strongly rounded. Base short, inflated, strongly rounded, 

 marked by the continuation of the axial riblets or by lines of growth 

 and spiral tln-eads, which vary very much in strength in the different 

 races. The umbihcus is moderately open and the umbilical wall is 

 marked by the continuation of the axial ribs and by obsolete or a 

 little stronger spiral threads. The last whorl may be appressed or 

 very slightly solute at the aperture. Aperture broadly oval ; peristome 

 double, the inner reflected and appressed to the outer, sometimes 

 almost coextensive with it; the outer moderately broadly expanded, 

 thick, forming an inconspicuous auricle at the posterior angle, wider 

 on the outer and basal lip than on the parietal wall, marked by con- 

 centric threads. In the male the outer lip is concave below the sum- 

 mit. Operculum with the nucleus halfway between subcentral and 

 submarginal, having a strong obhquely slanting lamella, wliich is 

 reinforced by oblique tln-eads. 



This species ranges over the eastern half of the mountains of Pinar 

 del Rio Province from Guajaib6n La Cumbre to Candelaria. It 



223580—40 13 



