COCHLOSTYLA OF MINDORO PROVINCE 



519 



Shell small, elongate-ovate, rather dull in coloration, all but the last 

 whorl very pale brown or huffish brown, the last whorl chestnut-brown. 

 All except the early nuclear whorls are variegated with retractively 

 curved, axial streaks of dull buff. These streaks vary considerably 

 in width and distribution on the various turns and also in their form, 

 each ranging from broad bands to figurations. The base is slightly 

 darker than the posterior part of the last whorl. The interior of the 

 aperture is pale blue, which color extends also over the inner portion 

 of the peristome; the outer edge of the peristome is almost black. 

 The inner edge of the columella is also blue like the interior of the 

 aperture. Nuclear whorls 3, the first smooth, the rest gradually 

 assuming the postnuclear sculpture, which consists of low, irregular, 

 rather closely approximated, retractively curved incremental lines. 

 In addition the postnuclear whorls are marked by the usual crisscross 

 microscopic sculpture and indications of obsolete spiral striations. 

 The postnuclear whorls are slightly rounded and appressed at the 

 summit. There is a feeble angle at the periphery and the basal 

 portion of the last turn is considerably protracted. The aperture is 

 elongate-ovate ; the peristome is broadly expanded and reflected. The 

 reflection almost covers the umbilicus at the insertion of the columella. 

 The parietal wall is covered by a moderately thick callus. 



This race can at once be distinguished from the other members with 

 the protracted base by its exceedingly small size. 



The type (U.S.N.M. no. 313714) was collected by Pedro de Mesa 

 on Mount Calavite near Paluan, Mindoro. It has 6.5 whorls and 

 measures: Length, 55 mm; greater diameter, 26.8 mm; lesser diameter, 

 22.6 mm. 



Five topotypes (U.S.N.M. no. 313715) from the same source yield 

 the following measurements: 



COCHLOSTYLA (CHRYSALLIS) CANICEPS Bartsch 



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

 vol. 22, p. 342. 



Shell varying from elongate-ovate to elongate-conic in the different 

 races. The nuclear whorls and probably the first postnuclear whorls 

 in all of the races are flesh-color, sometimes soiled flesh-color. The last 

 nuclear whorl and the light postnuclear whorls are bordered with a 



