476 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



COCHLOSTYLA (CHRYSALLIS) JAYI Bartsch 



1932. Cochlostyla (Chrysallis) jayi Bartsch, Journ. Washington Acad. Sci., 

 vol. 22, p. 340. 



Shell pupiform, almost cylindro-conic, rather heavy. The apex 

 varies in color from white to dark chestnut-brown. The early post- 

 nuclear whorls are considerably lighter than the later turns. The 

 postnuclear whorls are covered by a moderately thick periostracum, 

 which may be axially banded, streaked, blotched, spotted, or ful- 

 gurated with yellowish buff. These markings extend to the umbilical 

 chink on the last whorl. The aperture is bluish white or pinkish 

 white, while the expanded and reflected peristome may be soiled white, 

 brownish, or almost black with an iridescent blue reflection. Nuclear 

 whorls usually 3, well rounded; the first one is smooth, those succeed- 

 ing are marked by fine incremental lines. The postnuclear whorls 

 are appressed at the summit, moderately well rounded, and marked 

 by irregular, low, closely approximated, threadlike lines of growth 

 and also by obsolete indications of spiral striations and fine criss- 

 cross microscopic lines that cut the lines of growth obliquely. The 

 base is sculptured like the spire. The aperture is oval, oblique, 

 almost auricular, with the peristome decidedly expanded and reflected. 

 That of the inner lip broadly expanded at the insertion of the 

 columella where it is reflected over the base to almost cover the 

 umbilicus. The parietal wall is covered by a moderately thick callus. 

 The number of whorls varies between 7 and 8. The detailed 

 measurements are given under the races here recognized. 



Of this species I am now recognizing three subspecies, two of which 

 are bright chestnut-brown in the dark coloration, while the third is 

 much darker. The two paler-colored subspecies have brown lips, 

 while the dark one has an almost black lip with a purplish tinge. The 

 first of these, typical Cochlostyla (Chrysallis) jayi jayi, comes from 

 northeastern Mindoro; the second, corresponding with this in color, 

 comes from Calawagan near Paluan in northwestern Mindoro; 

 while the dark-colored race occupies an intermediate position on the 



north coast centering about Abra de Hog. 



i 



KEY TO THE SUBSPECIES OF COCHLOSTYLA (CHRYSALLIS) JAYI 



The ground color of the last whorl bright chestnut-brown. 



Shell large, length more than 70 mm jayi 



Shell not large, length less than 65 mm perpusilla 



The ground color of the last whorl almost blackish brown camorongana 



COCHLOSTYLA (CHRYSALLIS) JAYI JAYI Bartsch 



Plate 109, Figure 6 



1839. Bulimus ustulatus Jay, Catalogue of recent shells in the cabinet of John C. 

 Jay, ed. 2, p. 119, pi. 6, fig. 1. 



