396 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



The yellow periostracum distinguishes this, the typical 1 

 the rest. 



ace. 



from 



COCHLOSTYLA (CALOCOCHLEA) ROISSYANA MANLAYSA Bartsch 



Plate 96, Figures 1-3 



1901. Cochlostyla roissyana var. e Hidalgo, Obras malacologicas, p. 465, pi. 51, 



fig. 7. 

 1932. Cochlostyla (Calocochlea) roissyana vianlaysa Bartsch, Journ. Washington 



Acad. Sci., vol. 22, p. 336. 



Shell subglobular, with the periostracum almost white, sometimes 

 with a little pinkish tinge. A zone of brown marks the summit of the 

 whorls, and another, usually narrow, may be present immediately 

 above the periphery, or this may be absent. There is always a dark- 

 brown area about the umbilicus and usually a broad band of brown 

 midway between the peripheral zone and the dark umbilical area. 

 The outer lip is dark. 



This race is distinguished chiefly from typical roissyana by its much 

 paler color. I collected a series of specimens on the east shore of 

 Mansalay Bay, Mindoro. 



The type (U.S.N.M. no. 313614) has 5 whorls and measures: 

 Length, 31.6 mm ; greater diameter, 34.7 mm ; lesser diameter, 29.8 mm. 



U.S.N.M. no. 255928 contains a number of topotypes, which yield 

 the following measurements: 



Additional specimens yield the following measurements: 



