212 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 85 



CHONDROPOMETES (CHONDROPOMETES) VIGNALENSE JARUCENSE, new subspecies 



Plate 8, Figxjee 8 



Shell small, pale brown, with rather distant, inconspicuous, inter- 

 rupted, pale brown spiral bands. There is also an axial brown zone 

 a little distance behind tlie yellowish-white peristome, which extends 

 over the parietal wall of the umbilicus. 



The type, U.S.N.M. no. 367732, was collected by Father Roca in the 

 Hoyo de Jaruco, a sink located on the higli parts of the east side of 

 the Chorrera. It has 3.5 whorls remaining and measures: Length, 

 17.4 mm; greater diameter, 18.1 mm; lesser diameter, 14.0 mm. 



Subgenus Chondrothyroma Henderson and Bartsch 



1920. Chondrothi/roitui Hexder.sox and Bartsch, Proc. U. S. Nat. Mus., vol. 58, 

 p. 63. 



Shell turbinate, openly umbilicate, and marked by axial ribs only, 

 except on the umbilical wall, which shows spiral threads of varying 

 strength in the different races. Breathing pore present on the parietal 

 wall behind the peristome near the posterior angle of the aperture, 

 except in Chondropometes {Chondrothyroma) scopulorum per- 

 plexum^ and G (C.) magnum magnum in which the pore is some- 

 times absent. Aperture subcircular; peristome broadly expanded 

 and reflected, marked by concentric lines of growth which sometimes 

 suggest lamellae, fluted or smooth. The operculum is multispiral, the 

 whorls having a heavy callus deposit on the inner two-thirds, which 

 is somewhat fluted. This also varies in color in the different races 

 from white to red. 



Ty^Gi-. Chondropometes {Chondrothyroma) sagehieni (Poey), 



This subgenus ranges from Mendoza on the west eastward through 

 th.e Luis Lazo region along the south side of the Organ Mountains, 

 and the mogotes adjacent to them, to San Diego de los Banos, bending 

 northward to the Sierra la Cumbre, then to the westward to the Sierra 

 San Andres. The group therefore occupies a distinct range in the 

 Province of Pinar del Rio from that occupied by members of the 

 subgenus Chondropometes^ except in the Sierra Galalc'»n, Guacamayas, 

 and San Andres, where two subgenera overlap. 



We are recognizing nine sj^ecies in the subgenus and quite a number 

 of subspecies under these, each of which has its circumscribed zoogeo- 

 graphic distribution, » 



KEY TO THE SPECIES OF SUBGENUS CHONDROTHYROMA 



Operculum red. 



Greater diameter more than 21 mm eximium 



Greater diameter less than 18 mm. 



Axial dark band behind peristome present exquisitum 



