CUBAN ANNUDA'RIIDAE — TORRE AND BARTSCH 293 



ANNULARIA (ANNULAROPS) VANNOSTRANDI (Arango) 



Plate 30, Figure 5 



1876. Cyclostoma (Ctenopoma?) vannostrandi Arango, An. Acad. Cienc. Med., 

 Fis. Nat. Habana, vol. 12, p. 280. 



Shell very elongate-ovate, almost turreted, white. Nuclear whorls 

 decollated in all our specimens. Postnuclear whorls inflated, strongly- 

 rounded, and marked by very slender sublamellar axial riblets, of 

 wliich 95 occur on the first and 181 are on the last turn. These riblets 

 are only half the width of the spaces that separate them, and they are 

 rendered wavy by the almost obsolete spiral threads. Suture very 

 strongly constricted. Periphery inflated, strongly rounded. Base 

 short, inflated, strongly rounded, and marked by the continuation of 

 the axial ribs and by the same feeble spiral sculpture. Within the 

 umbihcus the axial riblets become stronger and the spiral threads are 

 more pronounced. Apertm-e circular; peristome double, the inner 

 shghtly exserted; the outer broadly expanded, forming a shghtly 

 reflected auricle at the posterior angle, free on the parietal wall from 

 the preceding turn. Operculum typically annularid. 



The specimen figured, U.S.N.M. No. 493456, is Arango's type. It 

 has 4 whorls remaining and measures: Length, 9.8 mm.; greater diam- 

 eter, 6.0 mm. ; lesser diameter, 5.1 mm. 



Arango stated that his unique specimen was collected on Wright's 

 last excursion in the island of Cuba. He did not have a definite 

 locahty for it. 



The collection of the United States National Museum contains four 

 lots of specimens resembling the type, which come from mogotes near 

 the Sierra de San Andres, namely, La Esperanza, La Cidra, and Bella 

 Maria. 



The solute last whorl is a character that is shared by A. {A.) 

 sauvallei, which is distinguished by its broadly ovate shell. 



ANNULARIA (ANNULAROPS) SEMICANA (Morelet) 



Shell rather large, broadly ovate, varying in color from flesh color 

 to reddish. Nuclear whorls 2, well rounded, smooth, forming a 

 rather pointed apex. Postnuclear whorls inflated, strongly rounded, 

 marked by retractively slanting, sublamellar axial riblets, which are 

 developed into auriclelike elements at the summit, where they are 

 conspicuously retractively bent over at their free edge. The spiral 

 threads are rather strong; their junctions with the axial ribs render 

 these slightly wavy and feebly nodulose. Suture strongly constricted. 

 Periphery inflated, strongly rounded. Base moderately long, inflated, 

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

 spiral threads, which are considerably stronger than those on the 

 spire. The junctions of the spiral threads with the axial ribs render 



