CUBAN ANNULARIIDAE TORRE AND BARTSCH 313 



strongly constricted. Periphery inflated, strongly rounded. Base 

 short, inflated, strongly rounded, openly umbilicated, marked by 7 

 spiral threads, which equal those on the spire in strength. The 

 anterior half of the base is marked by slender axial riblets, which 

 extend into the umbilicus, and which at their crossmg with the spiral 

 threads render these shghtly crenulose; within the umbilicus 12 spiral 

 threads are present, which likewise render the axial riblets crenulated. 

 Last whorl solute for about one-fifth of a turn. Aperture broadly 

 ovate; peristome simple, moderately expanded, sUghtly scalloped on 

 the inner lip and deeply, obUquely notched on the parietal wall near 

 the posterior angle to form a breathmg space. Operculum typically 

 annularid. 



The type, U.S.N.M. No. 356373, was collected by Mr. Henderson 

 at Loma de Candela, Habana Province. It has 5.1 whorls and meas- 

 ures: Length, 10.2 mm.; greater diameter, 9.2 mm.; lesser diameter, 

 7.0 mm. 



ANNULARIA (EUTUDORISCA) CATENATA (Gould) 



Shell broadly ovate, flesh colored with a huffish tinge; the spiral 

 keels are marked with interrupted spots of brown. The interior of 

 the aperture is the same as the exterior. Nuclear whorls 2, well 

 rounded, microscopically granulose, except for the last portion of the 

 last turn, which shows the beginning of the postnuclear sculpture. 

 Postnuclear whorls inflated, strongly rounded, marked by sublamellar 

 spiral cords, of which 7 occur on the first, 10 on the second, and 14 on 

 the last. The axial sculpture consists of incremental lines, which 

 render the first 2 or 3 spiral threads next the summit slightly nodulose. 

 Suture strongly constricted. Periphery inflated, strongly rounded. 

 Base short, inflated, strongly rounded, marked by 6 spiral threads, 

 which are a trifle stronger than those on the spire; on the umbilical 

 wall the axial sculpture assumes the strength of slender riblets, and the 

 spiral threads are reduced in size and spacing, 19 of them being present 

 in the typical race and 11 in ^. {E.) catenata blanesi. The junction of 

 the axial riblets with the spiral threads forms slender nodules. The 

 last whorl is solute for one-fifth of a turn. Aperture broadly oval; 

 peristome simple, only slightly expanded. Operculum typically 

 annularid. 



This species is rather widely distributed in Matanzas Province, 

 ranging from Limonar to Coliseo to Cardenas. 



We are recognizing two subspecies, which the following key will 

 help to differentiate: 



KEY TO THE SUBSPECIES OF ANNULARIA (EUTUDORISCA) CATENATA 



Spiral threads on umbilical wall many, closely spaced catenata 



Spiral threads on umbilical wall few, distantly spaced blanesi 



