COCHLOSTYLA OF MINDORO PROVINCE 507 



COCHLOSTYLA (CHRYSALLIS) ASPERSA JUANI Bartsch 



Plate 112, Figure 2 



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



Sci., vol. 22, p. 342. 



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



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



The shell is quite small, ovate. The first 1.5 nuclear whorls are 

 very pale brown, the rest darker brown, and this color gradually 

 deepens in intensity until on the last whorl it is bright chestnut-brown. 

 The later nuclear whorls and the postnuclear whorls show hydroph- 

 anous axial bands of various widths and shape, sometimes mere 

 lines and varying from this to fulgurations. These bands are present 

 on both spire and base. They are of an olivaceous-buff tint. The 

 aperture is pale blue within. The peristome is dark blackish brown, 

 which is also the color of the outer edge of the inner lip, the inner 

 portion of the columella being the same color as the interior of the 

 aperture. Nuclear whorls 2.5, forming a moderately elevated spire, 

 all but the last marked by fine lines of growth, the latter marked by 

 the crisscross sculpture of the postnuclear turns. The postnuclear 

 turns are appressed at the summit, moderately rounded, marked by 

 rather irregular, variable incremental lines and microscopic, closely 

 spaced, spiral striations, as well as exceedingly fine crisscross sculpture 

 on both spire and base. The suture is moderately impressed. The 

 periphery is feebly angulated. The base is short, inflated, and well 

 rounded. The aperture is broadly oval. The outer lip is expanded 

 and reflected. The columella is moderately expanded and reflected 

 to form a narrow umbilicus. 



This race is the smallest of the short-based forms, a fact that readily 

 distinguishes it from the other races. 



The type (U.S.N.M. no. 313708), collected by Pedro de Mesa at 

 Camorong in the Municipality of Abra de Hog, northern Mindoro, 

 has 6.2 whorls and measures: Length, 47.3 mm; greater diameter, 

 26.4 mm; lesser diameter, 23 mm. 



Six topotypes (U.S.N.M. no. 313709) yield the following additional 

 measurements: 



