230 PROCEEDINGS OF THE ^STATIOIS^AL MUSEUM vol. 85 



CHONDROPOMETES (CHONDROTHYROMA) SEGREGATUM SEGREGATUM, new subspecies 



Plate 12, Figure 4 



Shell small, rather broadly iimbilicatecl, straw-color, marked by 

 faint interrupted spiral bands of brown; peristome pale yellowish. 



The type, U.S.N.M. no. 355037, was collected on the Tomas Bar- 

 rera Expedition on the mogote on the east side of Kilometer 14, 

 between Pinar del Kio and Vinales. It is a complete specimen hav- 

 ing 6 whorls and measures : Length, 15.6 mm ; greater diameter, 12.7 

 mm; lesser diameter 9.6 mm. 



This subspecies we also collected on the whole complex of mogotes 

 nestling about Kilometer 14, but although we kept the shells col- 

 lected on the various rock piles distinct, careful examination does 

 not reveal any distinguishing characters. We are therefore apply- 

 ing this name to the entire lot. This subspecies resembles C. {C.) 

 segregatum sporadiciun mostly but has a heavier shell and wider 

 umbilicus. 



CHONDROPOMETES (CHONDROTHYROMA) SEGREGATUM SPORADICUM, new subspecies 



Plate 12, Figuee 5 



Shell small, very thin, of pale buff ground color with the peristome 

 a little paler in color, or feebly marked with rather distantly spaced, 

 interrupted spiral bands of- brown. 



The type, U.S.N.M. no. 468727, comes from Mogote de Quilla, 

 Finca el Descanso, Entronque de Hcrradura. It is a complete speci- 

 men having 5 whorls and measures: Length, 14.0 mm; greater di- 

 ameter, 12.0 mm; lesser diameter, 6.3 mm. 



The thinner shell and narrower umbilicus distinguish this from 

 C. {C.) segregatum segregatum. 



CHONDROPOMETES (CHONDROTHYROMA) SEGREGATUM MAMEYI, new subspecies 



Pl.\te 12, Figure 8 



Shell similar to C. (C.) segregatum sporadicum but white with a 

 mere flush of yellow. As in that race, the shell may or may not 

 have pale brown interrupted spiral lines arranged in axial series 

 on spire and base. The axial ribbing in this is also a little stronger, 

 W'hich is also true of the obsolete spiral sculpture. 



This subspecies was collected by Natenson on Mogote Mamey, the 

 northern one of the two large limestone peaks off the southwestem 

 end of the Sierra Guacamayas. 



The type, U.S.N.M. no. 468928, a complete specimen, has 6.0 

 whorls and measures : Length, 15.4 mm ; greater diameter, 12.7 mm ; 

 lesser diameter, 8.9 mm. 



