CUBAN SUBFAMILY CHOXDROPOIMINAE — TORRE AND BARTSCH 285 

 CKONDROTHYRETES TENEBRATA VARIABILIS, new subspecies 



Plate 20, Figure 4 



This race was collected by Natenson on the small mogote southwest 

 of the Mogote Largo, which lies off the southwestern end of the 

 Sierra Guacamayas. 



In this subspecies the shell averages smaller than those of C. tene- 

 hrata canaletemis, and is decidedly variable in color, which ranges 

 from dark clouded chestnut-brown through various shades of orange, 

 with brown spiral lines, which may be slender or even confluent at 

 expanded intervals, where they may even form axial dark zones. 

 Regardless of what the general coloration of the shell may be, the 

 radiating dark zones of the outer lip here never equal the lighter 

 intervals in extent. 



The type, U.S.N.M. no. 493297, has 4.0 whorls remaining, which 

 measure: Length, 20.8 mm, greater diameter, 14.7 mm; lesser 

 diameter, 10.2 mm. 



CHONDROTHYRETES TENEBRATA AYUENSIS, new subspecies 



Pjlatb 20, Figure 1 



This race comes from the Ensenada de la Ayua on the south side 

 of the Sierra San Andres. 



Shell with the early postnuclear whorls a dark orange, gradually 

 changing to very pale orange or even flesh-color on the last whorl, 

 unicolor or variously banded, strongly rayed on both sides of tlie 

 expanded outer peristome. 



The type, U.S.N.M. no. 468814, has 4.5 whorls remaining and 

 measures: Length, 23.0 mm; greater diameter, 16.0 mm; lesser 

 diameter, 11.3 mm. 



The bright orange color of this race readily distinguishes it from 

 all the other subspecies. 



CHONDROTHYRETES TENEBRATA BREVIOR, new subspecies 



Plate 20, Figure 2 



This race comes from Caracoles, north of the Sierra Guacamayas. 



Shell small, pale yellow or orange, Avith the expanded outer lip 

 strongly rayed both in front and on the back. The dark axial 

 zone behind the peristone is narrow, or almost absent. The shell is 

 feebly rayed. 



The type, U.S.N.M. no. 468807, is a complete specimen having 

 6.7 turns and measuring: Length, 20.8 mm; greater diameter, 14.5 

 mm ; lesser diameter, 9.4 mm. 



The small size will readily distinguish this race from all the others. 



