CUBAN SUBFAMILY CHONDROPOMINAE TORRE AND BARTSCH 259 



There is a particular tendency toward this on the Chorrera, where 

 we frequently find shells with a brown band at the summit, one at 

 the periphery and one on the middle of the base. 



Figure 86. — Distribution of the subspecies of Chrondrothyra {Chondrothyra) tosta: (1) 

 pertosta; (2) tosta; (3) lactea; (4) aurantia ; (5) hesperia. 



The type, U.S.N.M. no. 492725, has 4.2 whorls remaining and 

 measures: Length, 24.5 mm; greater diameter, 16.4 mm; lesser diam- 

 eter, 11.8 mm. This was collected at Banos San Vicente. 



We are also figuring a banded specimen from the Chorrera at 

 Banos San Vicente. 



CHONDROTHYRA (CHONDROTHYRA) TOSTA HESPERIA, new subspecies 

 Plate 15, Figuke 4 



This subspecies, which comes from Pan de Azucar, resembles typ- 

 ical C. (C.) tosta but is smaller. The shells are white, with a dark 

 axial zone behind the peristome. The last whorl behind this dark 

 zone has a tendency toward becoming orange. This is usually faint 

 although occasionally a specimen is found which is a little more 

 pronouncedly orange. 



The type, U.S.N.M. no. 492727, has 4.0 whorls remaining and 

 measures: Length 24.5 nun; greater diameter, 16.1 mm; lesser diam- 

 eter, 10.4 mm. 



