COCHLOSTYLA OF MINDORO PROVINCE 485 



The type (U.S.N.M. no. 382973) was collected by Quadras at Sitio 

 Brucaan, Mangarin, southwest Mindoro. It has 6.4 whorls and 

 measures: Length, 56.9 mm; greater diameter, 29.2 mm. 



This species differs from typical C. electrica electrica in being more 

 globose and in having the axial fulgurations retractively slanting. It 

 differs from C. electric bulalacaoana in being more globose and in 

 .having a much less heavy periostracum. 



COCHLOSTYLA (CHKYSALLIS) ELECTRICA BULALACAOANA Bartsch 



Plate 109, Figure 3 



1901. Cochlostyla electrica Hidalgo, Obras malacologicas, p. 553; in part. 

 1932. Cochlostyla (Chrysallis) electrica bulalacaoana Bartsch, Journ. Washington 

 Acad. Sci., vol. 22, p. 340. 



Shell elongate-ovate. The first postnuclear whorl white; the next 

 one showing at the summit the beginning of a brown zone, which rapidly 

 spreads over the entire portion of the nuclear turns at their termination. 

 From there on the ground color of the shell is chestnut-brown. The 

 entire surface of the shell is overlain by a heavy yellowish-olive perios- 

 tracum except at the peripheral zone and certain spots near the sum- 

 mit of the shell where the brown substratum shines through. Through 

 this periostracum retractively slanting, moderately broad, zigzag, 

 axial fulgurations are visible. The interior of the aperture is bluish 

 white. The broadly expanded periostracum is reddish chocolate- 

 brown. This is also the color of the outer half of the inner lip and the 

 broad zone, marking the edge of the parietal callus. Nuclear whorls 

 2.8, well rounded, smooth except for the last half of the last whorl, 

 which shows the beginning of the postnuclear sculpture. The post- 

 nuclear whorls are slightly rounded, appressed at the summit and 

 marked by feeble, closely spaced, flattened axial threads. The usual 

 crisscross, obliquely placed, microscopic incised lines, which cut the 

 lines of growth obliquely both protractively and retractively, are also 

 present. There are also indications of fine spiral lines. In addition 

 the surface is marked by fine, whitish, wavy vermiculations, which are 

 closely spaced. These are best shown on the early postnuclear whorls, 

 but become somewhat obscured in this race on the last turn. The base 

 is marked like the spire. The aperture is broadly oval; outer lip 

 broadly expanded and reflected; the inner lip is broadly expanded, 

 especially at its insertion, and reflected over the umbilicus, which it 

 leaves as a small chink. It extends over the parietal callus as a heavy 

 callus, rendering the peritreme complete. 



The type (U.S.N.M. no. 382974) was collected by Quadras at 

 Boca de Cora, Bulalacao, southeastern Mindoro. It has 6.4 whorls 

 and measures: Length, 61.2 mm; greater diameter, 30.6 mm. 



The discussion of relationships with C. electrica mangarina will be 

 found under that subspecies. 



