CUBAN SUBFAMILY CHONDROPOMINAE — TORRE AKD BARTSCH 397 



last whorl varies from solute to adnate. There is a breathing pore 

 close to the posterior angle of the aperture on the parietal wall im- 

 mediately behind the edge of the peristome, which is connected with 

 the free edge of the peristome b}" a slit. Operculum thin, corneous, 

 paucispiral, with a rather heavy deposit of calcareous granules on the 

 outside. 



This species is at present known from the south coast of Santa 

 Clara Province, where it breaks up into a series of races on the var- 

 ious limestone blocks. 



The animals of three of the subspecies were described by Bartsch 

 as follows: 



Chondrothyrium violaceum. violaceurii 



Taken from a stone fence at La Pastora, 4 kilometers northwest 

 of Trinidad. 



Top of head buff, finely dotted with white; area about tentacles 

 pale pink; tentacles coral red tipped with blue black; sides of body 

 pale bluish smoky gray; sole of foot deeply cleft, a little paler than 

 the sides of body. 



Chondrothyrium vwlaceum vigiaense 



Taken at La Vigia near Trinidad. 



Top of head pale brown with a decided rosy flush ; tentacles coral- 

 red tipped with dusky brown ; area ab<iut the base of tentacles a little 

 paler than general ground color ; snout pale buff at tip ; sides smoke 

 gray marked by numerous papillae, which are marked by many fine 

 white dots; sole of foot a little paler than sides of body, deeply cleft. 



ChondrotJiyrium violaceum letc ranense 



Specimens taken at San Juan de Leteran. 



Top of head buff with rosy flush; snout and sides of body with 

 olivaceous ground color upon which numerous papillae, each marked 

 with many white dots, are disposed; tentacles varying in different 

 individuals from dark orange to carmine red, paler at base and dusky 

 at tip, the latter very slightly expanded; sole of foot smoke gray. 

 In moving, the animal may carry its shell steadily or it may move 

 it by lateral jerks. 



KEY TO THE SUBSPECIES OF CHONDROTHYRIUM VIOLACEUM 



Interrupted spiral bands of brown very strong. 



Truncated shell elongate-ovate montanei 



Truncated shell ovate. 



Axial riblets very fine and closely spaced mortei 



Axial riblets not very fine and more ^Yidely spaced vigiaense 



