394 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 85 



distributed axial riblets, which extend prominently to the summit 

 where they become somewhat expanded and occasional!}^ somewhat 

 thickened. These riblets extend prominently over the inflated and 

 well-rounded periphery to the base. The spiral sculpture consists 

 of obsolete indications of threads, which render the axial ribs slightly 

 vertebrated. Base short, inflated, strongly rounded, broadly openly 

 umbilicated, marked by the continuations of the axial ribs, which ex- 

 tend undiminished into the umbilicus, and obsolete indications of 

 spiral threads like those of the spire. The umbilical wall is marked 

 by strong spiral cords, which diminish in strength from the outside 

 inward. Aperture pear-shaped. Posterior angle obtuse, Peristomie 

 decidedly expanded and obliquely reflected, not flattened; the outer 

 lip is marked by dark spiral zones alternating with a broader white 

 band ; the parietal wall of the peristome is less broadly expanded than 

 the rest. Operculum paucispiral with excentric nucleus, the last 

 whorl with a thin calcareous granular deposit. 

 We are recognizing two subspecies. 



KEY TO THE SUBSPECIES OF CHONDROPOMA (GUTIERREZIUM) GUTIERREZI 



Decollated shell more than 17 mm gutierrezi 



Decollated shell less than 1.5 mm negrosense 



CHONDROPOMA (GUTIERREZIUM) GUTIERREZI GUTIERREZI (Gundlach) Pfeiflfer 



Plate 38, Figure 4 



1856. Cyclostoma gutierrezi (Gundlach) Poey, Memorias sobre historia natural 



de la Isla de Cuba, vol. 2, p. 4, nomeii nudum. 

 1858. Cyclostoma gutierrezi (Gundlach) Pfeifier, Malakozool. Blatter, vol. 5, 



p. 46. 



This race, which comes from the environs of Guisa. is distinguished 

 from C. {G.) gutierrezi negroscn-^e in being much larger and of paler 

 coloration. 



A specimen from the type locality, U.S.N.M. no. 104507, collected 

 by Gundlach, has 4.1 whorls remaining and measures: Length, 18.0 

 mm; greater diameter, 13.7 mm; lesser diameter, 10.0 mm. 



CHONDROPOMA (GUTIERREZIUM) GUTIERREZI NEGROSENSE, new subspecies 



Plate 38, Figure 3 



This race was collected by Dr. de la Torre at Los Xegros southeast 

 of Baire. It is much smaller and darker colored than the typical C. 

 {(r.) g u tierrezi gutierrezi. 



Tlie type, U.S.N.M. no. 367829, has 3.8 whorls remaining and 

 measures: Length, 14.2 mm; greater diameter, 10.5 mm; lesser diam- 

 eter, 8.0 mm. 



