466 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



and marked by retractively curved lines of growth, which are almost 

 threadlike and extend equally strong over spire and base. Aperture 

 broadly oval; outer lip partly expanded and reflected; inner lip quite 

 broad, reflected to form a narrow umbilicus. 



The specimen described and figured (U.S.N.M. no. 313670) was 

 collected by Quadras on Mindoro without definite locality. It has 

 5.3 whorls and measures: Length, 25.2 mm; greater diameter, 14.4 

 mm; lesser diameter, 12.9 mm. 



This race is a miniature of the larger subspecies found on Tablas 

 Island. 



COCHLOSTYLA (PROCHILUS) CUYOENSIS SUBPALLIDA Bartsch 



Plate 107, Figure 8 



1932. Cochlostyla (Prochilus) cuyoensis subpallida Bartsch, Journ. Washington 

 Acad. Sci., vol. 22, p. 338. 



Shell very small and thin, semitranslucent, of pale straw-color, 

 marked by broad, retractively slanting, hydrophanous bands, which 

 appear to terminate at the periphery. There is the faintest indication 

 of a peripheral dark band and an ill-defined columellar area of the same 

 shade. The nuclear whorls are white. The interior of the aperture, 

 peristome, and columella are likewise white. Nuclear whorls 1.5, 

 well rounded, smooth except for incremental lines, which render the 

 summit slightly crenulated. The postnuclear whorls are moderately 

 rounded, appressed at the summit, and marked by retractively slanting 

 lines of growth, which are faintly threadlike. Suture moderately 

 constricted. Periphery with the merest indication of an obsolete 

 angle. Base moderately long, well rounded; aperture broadly oval; 

 outer lip expanded and reflected; inner Up broadly expanded and 

 reflected to form the narrow umbilicus. The parietal wall is covered 

 by a straw-colored callus. 



The type (U.S.N.M. no. 313671) was collected by C. Canonizado on 

 Caluya Island. It has 5.3 whorls and measures: Length, 25.1 mm; 

 greater diameter, 14.1 mm; lesser diameter, 12.5 mm. 



This race differs from Cochlostyla {Prochilus) cuyoensis contracta in 

 its exceedingly thin shell, which permits all the interior to be seen by 

 transmitted light, and in lacking the decided color bands. 



COCHLOSTYLA (PROCHILUS) FICTILIS (Broderip) 



Shell small, spindle-shaped, covered with a thick periostracum, 

 which is usually fulgurated with hydrophanous bands. In one of the 

 subspecies, Cochlostyla (Prochilus) jictilis mangarina, there is a broad 

 white band at the summit; in the others this is absent. The ground 

 color varies considerably, but usually it is some shade of brown. 

 The interior of the aperture is bluish white, and the peristome is of 

 the same shade or tinged with pale yellow. Typical Cochlostyla 



