CUBAN SUBFAMILY CHONDROPOMINAE — TOERE AND BARTSCH 257 

 CHONDROTHYRA (CHONDROTHYRA) SUBEGREGIA SUBEGREGIA, new subspecies 



PL.V1E 16, FlGITRE 4 



This race, which comes from the ]\Iogote de hi Jagiia, has the shell 

 smaller and considerably brighter and more shining in color than 

 C. {G.) subegregia paterna. It also has the outer expanded peri- 

 stome conspicuously marked with radiating brown zones. 



The type, U.S.N.M. no. 367838, has 3.8 whorls remaining and 

 measures: Length, 24.3 mm; greater diameter, 17.7 mm; lesser 

 diameter, 12.1 mm. 



CHONDROTHYRA (CHONDROTHYRA) SUBEGREGIA PATERNA, new subspecies 



Plate 16, Figuke 5 



Tliis race comes from the Sitio de la Sierra San Andres. It 

 differs from the preceding in having a duller surface and in being 

 almost always without radiating brown zones on the outer peristome. 



The type, U.S.N.M. no. 367842, has 4.5 whorls remaining and 

 measures: Length, 28.0 mm; greater diameter, 19.3 mm; lesser 

 diameter, 12.2 mm. 



CHONDROTHYRA (CHONDROTHYRA) TOSTA, new species 



Shell ovate-conic, varying in color from white through wax yellow 

 to orange to red, unicolor or banded, always with a dark zone behind 

 the peristome, except C. (C.) tosta lactea^ which is pure white. 

 Nuclear v.horls almost 2, inflated, strongly rounded, microscopically 

 granulose. Postnuclear whorls marked by rather strong spiral threads 

 and a little less strong and more closely spaced retractively slanting 

 axial threads, which are most conspicuous between the spiral threads 

 and render these minutely nodulose at their junction. The spaces 

 enclosed between the axial and spiral threads are more or less rec- 

 tangular, having their long axis parallel with the axial sculpture. 

 Suture well constricted. The summit of the whorls being tightly 

 appressed to the preceding turn, leaves an indication of a little narrow 

 band, which is rendered feebly developed by the axial riblets. It 

 should be understood that this is largely a mere indication. Periphery 

 and base of the last whorl inflated and strongly rounded, the latter 

 umbilicate and marked by the same type of sculpture as that which 

 characterizes the spire. Aperture broadly oval, slightly angulated at 

 the junction of the parietal wall witli the outer lip, double. The outer 

 broadly flaringly expanded, radially fluted and marked by feeble con- 

 centric laminae ; the inner also expanded and appressed to the outer. 

 Operculum thin, corneous, covered with a rather heavy deposit of 



66879—38 5 



