COCHLOSTYLA OF MINDORO PROVINCE 475 



Periphery of the last whorl well rounded. Aperture oval. Outer 

 lip moderately expanded and reflected; inner lip broadly expanded 

 at its insertion and reflected over the umbilicus, extending over the 

 parietal wall as a rather heavy callus. 



The type (U.S.N.M. no. 382970) was collected by the Exploring 

 Expedition, probably in the southern tip of the island of Mindoro 

 where the expedition made a landing. It has 6.9 whorls and measures: 

 Length, 59.8 mm; greater diameter, 28.9 mm. 



This form is nearest related to Cochlostyla chrysalidiformis villosa, 

 from which it can easily be distinguished by its more ovate form 

 and much less strongly developed sculpture. 



COCHLOSTYLA (CHRYSALLIS) CHRYSALIDIFORMIS FUSCATA Bartsch 



Plate 108, Figure 1 



1932. Cochlostyla (Chrysallis) chrysalidiformis fuscata Bartsch, Journ. Wash- 

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



Shell elongate-ovate, with a rather regularly conic spire. The 

 early whorls are flesh-color, the succeeding turns gradually becoming 

 more yellow and tending to orange on the last volution. The parietal 

 wall is covered by a pale-brown callus. Peristome soiled white. 

 The interior of aperture is white with a grayish tinge. In addition 

 there are hydrophanous bands extending from the summit, which 

 they render falsely denticulate, to the umbilical chink. Nuclear 

 whorls 2.2, well rounded, smooth. The postnuclear whorls are only 

 slightly rounded; the last one is very feebly obsoletely angulated at 

 the periphery, with the base well rounded. The whorls are appressed 

 at the summit and marked by rather weak, irregularly developed, 

 retractively slanting, closely spaced lines of growth, which extend 

 to the umbilical chink at the last turn. Suture but slightly con- 

 stricted. Aperture rather broadly oval. The outer Up is slightly 

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

 reflected over the base as a thick callus. The parietal wall is covered 

 by a thin translucent callus, which permits the brown parietal wall 

 to shine through. 



The type (U.S.N.M. no. 382971) was collected by Lieutenant 

 Febiger. It has 6.8 whorls and measures: Length, 70.7 mm; greater 

 diameter, 32.4 mm. 



No specific locality is given, but the specimens are labeled Coch- 

 lostyla mindoroensis and are from the Lea collection, which would 

 indicate that they came from Mindoro. 



Two additional specimens (U.S.N.M. no. 104356), from the same 

 source, have 6.2 and 7 w T horls and measure: Length, 58.7 and 60.1 

 mm; greater diameter, 28.9 and 34 mm, respectively. 



