520 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



narrow zone of brown at the summit. The postnuclear whorls vary 

 from almost flattened to fairly well rounded, and the periphery of the 

 last whorl in some of the races is quite inflated; in others it is not in- 

 flated, but in all of them it is rounded and usually marked with a color 

 line that separates the basal portion of the shell from the posterior part. 

 The base, too, in some of the races is more inflated than in others. 

 The postnuclear whorls are marked by retractively slanting bands or 

 figurations of yellow or greenish yellow, which vary in width and 

 strength and emphasis. These extend from the summit to the um- 

 bilical region. In some of the races on the last whorl they become 

 more or less fused, and here the shell looks as if it were covered with 

 a uniform motley periostracum. The interior of the aperture is 

 bluish white, and the expanded peristome varies from white suffused 

 with purplish brown to purplish brown in the different races. In all of 

 them the outer edge of the peristome is bounded by a zone of purplish 

 brown. This usually also extends up on the outer edge of the parietal 

 callus. The postnuclear whorls are marked by retractively slanting, 

 irregularly developed and spaced lines of growth, which give to the 

 surface of the shell a somewhat rough appearance. The shaggy 

 appearance obscures the fine microscopic crisscross sculpture, which 

 crosses the lines of growth obliquely. The aperture is broadly oval; 

 the outer lip is broadly expanded and reflected; the inner lip very 

 broad at its insertion where it is reflected over the umbilicus, which it 

 almost covers. The parietal area is covered by a rather thick callus. 

 This species seems to be widely distributed on the island of Mindoro. 

 It probably ranges over the entire island and apparently breaks up 

 into a number of races, so I give it a specific status here. 



KEY TO THE SUBSPECIES OF COCHLOSTYLA (CHRYSALLIS) CANICEPS 



Shell brilliantly variegated demesai 



Shell not brilliantly variegated. 

 Shell rather dull in color. 

 Shell elongate-ovate. 



Shell large; length more than 70 nam maita 



Shell not large; length less than 65 mm contracostana 



Shell elongate-conic. 



Whorls almost flattened conica 



Whorls rounded. 



Length more than 55 mm caniceps 



Length less than 50 mm rninuta 



COCHLOSTYLA (CHRYSALLIS) CANICEPS DEMESAI Bartsch 



Plate 114, Figure 1 



1932. Cochlostyla (Chrysallis) caniceps demesai Bartsch, Journ. Washington 



Acad. Sci., vol. 22, p. 342. 



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



Michigan Acad. Sci., Arts, Letters, vol. 17, p. 545; in part. 



