COCHLOSTYLA OF MINDORO PROVINCE 503 



broadly ovate to elongate-ovate. The peristome is broadly expanded 

 and reflected and very wide at the insertion of the columella, where it 

 is reflected over the umbilicus that it almost covers. The species 

 apparently ranges all over the island and breaks up into the zoogeo- 

 graphic races discussed above. 



The following key will help to differentiate the races: 



KEY TO THE SUBSPECIES OF COCHLOSTYLA (CHRYSALLIS) ASPERSA 



Base of last whorl not protracted. 

 Shell ovate. 



Shell large. 



Lip almost black lunai 



Lip not almost black. 



Lip with a decidedly bluish tinge aspersa 



Shell small juani 



Shell not ovate. 



Shell elongate-ovate. 



Color of base conspicuously darker than the rest of the 

 last whorl. 



Shell gibbose ___ mindoroensis 



Shell not gibbose. 



Shell slender melanogaster 



Color of base not conspicuously darker than the rest 



of the last whorl wagneri 



Base of last whorl protracted. 

 Shell elongate-ovate. 



Ground color of last whorl chocolate-brown edgari 



Ground color of last whorl blackish brown binuangana 



Shell not elongate-ovate. 



Shell large ilogana 



Shell small calavitana 



COCHLOSTYLA (CHRYSALLIS) ASPERSA LUNAI Bartsch 



Plate 112, Figukb 7 



1932. Cochlostyla (Chrysallis) aspersa lunai Bartsch, Journ. Washington Acad. 



Sci., vol. 22, p. 341. 



1933. Helicostyla (Chrysallis) mindoroensis Clench and Archer, Papers Michigan 



Acad. Sci., Arts, Letters, vol. 17, p. 544; in part. 



Shell large. The nuclear whorls are brown; all but the last post- 

 nuclear whorl bright chestnut-brown; the last whorl almost blackish 

 brown. The interior of the aperture bluish white, the expanded peri- 

 stome and columella blackish brown. The postnuclear whorls are 

 covered with a thin periostracum, showing retractively slanting 

 hydrophanous bands, which are of varying shapes, sometimes regular 

 zones, sometimes figurations, even in the same individual. These 

 bands extend from the summit of the whorl to the umbilical chink. 

 Nuclear whorls 3, the first well rounded and marked by lines of growth 

 only, the succeeding turns marked by almost threadlike incremental 



