300 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 85 



nant. Spiral color bands here are also less frequently met with 

 than in C. harhouH itineraria. 



The type, U.S.N.M. no. 474199, comes from Luis Lazo and has 

 5.5 whorls remaining, which measure : LengtJi, 34.2 mm ; greater 

 diameter, 21.5 mm; lesser diameter, 16.2 mm. 



CHONDROTHYBETES BARBOURI ITINERARIA, new anbspecies 



Plate 21, Figure 7 



This subspecies extends through the mogotes along the roadside 

 to the east and west of Cabezas. It is smaller, thinner, paler, and 

 almost always spirally banded. 



The type, U.S.N.M. no. 499589, comes from the first mogote on 

 the northwest side of the road east of Cabezas. It has 5.8 whorls 

 remaining and measures: Length, 28.0 mm; greater diameter, 16.4 

 mm; lesser diameter, 12.5 mm. 



CHONDROTHYRETES GUNDLACHI (Arango) 



Shell rather large, ovate-conic, varying in ground color from 

 flesh-color through buff to pale orange, with or without a darker 

 zone behind the peristome and with or without interrupted spiral 

 bands. Nuclear whorls about 1.5, inflated, well rounded, smooth 

 except for incremental lines. Postnuclear whorls well rounded, 

 marked by slender, retractively curved, axial threads and rather 

 stronger spiral threads, the combination of which forms a somewhat 

 fenestrated pattern, while the junction of these elements forms 

 slender nodules. The spiral threads frequently are conspicuously 

 white in the typical race. Suture well constricted. Periphery of 

 the last whorl inflated, well rounded. Base short, well rounded, and 

 marked like the spire. Aperture broadly ovate. Peristome double; 

 the inner slightly exserted and somewhat reflected, the outer broadly 

 flaringly expanded, fluted and marked with concentric lamellae, cut 

 on the middle of the inner lip with the posterior part reflected as 

 a broad callus, which closes the umbilicus. The parietal wall is cov- 

 ered with a broadly expanded outer peristome. The breathing pore 

 is on the parietal wall near the posterior angle of the aperture. 

 Operculum with 3.5 whorls, the last covered with a heavy deposit 

 of calcareous granules, which have a somewhat fluted appearance. 



This species ranges from the Sierra de Paso Keal Guane eastward 

 through the Sierra de Guane through Portales through the Puerta 

 de la Murallia. 



We are recognizing five zoogeographic races, which we are desig- 

 nating as subspecies. 



Distribution of the subspecies of C. gmidlachi is shown in figure 

 97. 



