COCHLOSTYLA OF MINDORO PROVINCE 529 



addition to the axial sculpture, the whorls are marked by mere indi- 

 cations of obsolete spiral lines and the usual microscopic crisscross 

 sculpture. The aperture is broadly oval; peristome is broadly 

 expanded. The columella is reflected over and almost covers the 

 umbilical chink. 



The type (U.S.N.M. no. 195408) was collected by von Mollendorff 

 in southwestern Mindoro. It has 6.2 whorls and measures: Length, 

 63.6 mm; greater diameter, 32.2 mm; lesser diameter, 25.4 mm. 



Six additional specimens without specific locality are referable here: 

 Two from the Redfield collection (U.S.N.M. no. 309414) have 6.3 

 and 6 whorls and measure: Length, 63.2 and 58.1 mm.; greater diam- 

 eter, 30.2 and 31.8 mm; lesser diameter, 24.1 and 25.3 mm, respec- 

 tively. Two others (U.S.N.M. no. 104347), collected by Lieutenant 

 Febiger, have 6 whorls each and measure: Length, 58.2 and 62.9 

 mm; greater diameter, 31.5 and 31.3 mm; lesser diameter, 24.3 and 

 24.9 mm, respectively. The last two (U.S.N.M. no. 315639) come 

 from the Evezard collection. They have 6 whorls and measure: 

 Length, 61.2 and 57 mm; greater diameter, 31.3 and 30.3 mm; lesser 

 diameter, 55 and 54.6 mm, respectively. 



This subspecies is nearest related to Cochlostyla (Chrysallis) nigriceps 

 nigriceps, from which it is distinguished by its larger size. 



COCHLOSTYLA (CHRYSALLIS) NIGRICEPS NIGRICEPS Bartsch 



Plate 113, Figure 3 



1932. Cochlostyla (Chrysallis) nigriceps nigriceps Bartsch, Journ. Washington 

 Acad. Sci., vol. 22, p. 343. 



Shell elongate-ovate. The first half of the nuclear turns is pale 

 chocolate-color, the rest dark chocolate-color. The postnuclear 

 whorls are of a chocolate ground color, covered with a rather thick 

 periostracum, which causes the surface of the shell to look axially 

 streaked with yellowish straw-color and brown retractively slanting 

 bands and fulgurations. There is a faint peripheral zone of brown 

 present, and the base is inclined to be slightly darker than the posterior 

 portion of the last whorl. The aperture is bluish white within, gradually 

 changing to chocolate-brown on the expanded peristome. This brown 

 coloration also extends over the edge of the parietal callus. The first 

 nuclear whorl is well rounded and smooth, the next one shows the 

 beginning of the lines of growth, and the third and last one is sculptured 

 like the postnuclear turns. The postnuclear turns are moderately 

 rounded, appressed at the summit, and marked by retractively 

 curved, irregularly developed and irregularly spaced, somewhat 

 threadlike, axial lines of growth, which are retractively curved. 

 These extend over the base into the umbilical chink on the last whorl. 

 In addition there are fine, poorly expressed, spiral striations and the 



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