COCHLOSTYLA OF MINDORO PROVINCE 



445 



substratum or shell proper is white. There is a moderately broad, 

 more or less interrupted band at the summit of the postnuclear 

 whorls and another at the periphery. These two bands are pale 

 brown, and they are both interrupted by axial hydrophanous spots. 

 There is no dark columellar area in this race. The interior of the 

 aperture, the outer lip, and columella are white. Nuclear whorls 2, 

 well rounded, forming a blunt apex. The postnuclear whorls are 

 appressed at the summit, moderately rounded, and marked by 

 retractively slanting lines of growth and fine, microscopic, closely 

 spaced, spiral striations, which are present on both spire and base. 

 The aperture is oblique, almost subquadrate; the outer lip is slightly 

 expanded and reflected. The columella is slightly oblique, somewhat 

 twisted, and slightly excavated. 

 A series of specimens before me yields the following measurements: 



