CUBAN ANNTJDARiroAE TORRE AND BARTSCH 365 



ANNULARIA (ANNULAROSA) FEAGILIS ([Gundlach] Pfeiflfer) 



Shell broadly conic, pale horn colore(,l. Nuclear whorls almost 2, 

 well rounded, microscopically granulose, scarcely differentiated from 

 the postnu clear turns. Postnuclear whorls strongly romided and 

 marked by almost obsolete, slightly retractively curved axial riblets. 

 Suture strongly impressed. Periphery well rounded. Base rather 

 broadly ,*openly umbilicated, marked by the faint continuation of the 

 axial riblets and by malleations, the latter placed in such a regular 

 manner that they suggest spiral threads. The junction of the umbil- 

 ical with the basal wall is marked by a rather strong spiral cord. 

 The umbilical wall shows faint spiral threads. Last whorl solute for 

 a fraction of a turn. Aperture subcircular; peristome simple. Oper- 

 culum typically annularid. 



The following key and descriptions will differentiate the subspecies: 



KEY TO THE SUBSPECIES OF ANNULARIA (ANNULAROSA) FRAGILIS 



Spiral threads on umbilical wall obsolete f ragilis 



Spiral threads on umbilical wall not obsolete juliani 



ANNULARIA (ANNULAROSA) FRAGILIS FRAGILIS ([Gundlach] Pfeiffer) 



Plate 48, Figures 1-3 



1859. Clioanopoma fragile [Gundlach] Pfeiffer, Malakozool. Blatter, vol. 6, 



p. 70. 

 1862. Cyclostoma fragile Reeve, Conchologia iconica, No. 153. 

 1920. Annvlaria (Anniilarosa) fragilis Henderson and Bartsch, Proc. U. S. 



Nat. Mus., vol. 58, p. 72. 



This, the typical subspecies, was collected by Gimdlach on Monte 

 Toro, at Cafetal Yemen, northeast of Guantanamo, Oriente Province. 



The specimen described and figured, U.S.N.M. No. 355900, a 

 cotype, was received by Dr. de la Torre from Gundlach. It has 5 

 whorls and measures: Length, 10.6 mm.; greater diameter, 10.5 mm.; 

 lesser diameter, 8.2 mm. 



Typical A. (A.) fragilis fragilis is readily distinguished from A. 

 (A.) fragilis juliani in being larger, and in having the axial riblets 

 merely indicated and more distantly spaced. The malleations of the 

 base referred to in our description of the species are also much more 

 pronounced, and the spiral threads on the umbilical wall are scarcely 

 indicated. 



We have also seen specimens collected by Wright at Kio Cuzco, 

 Oriente Province. 



ANNULARIA (ANNULAROSA) FRAGILIS JULIANI, new subspecies 



Plate 48, Figures 4-6 



This subspecies was collected by Julian Acuna at Jarahueca, Alto 

 Songo, Oriente Province. It is distinguished from the typical A. 



