402 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



always has the columella!" area dark, and in addition some of the speci- 

 mens before me, apparently from the same locality, may show a single 

 band of brown, while in others two or three bands may be present, and 

 in some instances the entire base may be dark or relieved by a lighter 

 zone. These basal bands vary materially in width and spacing, as well 

 as in color, for some are dark, almost blackish brown, while in others 

 the chestnut element prevails or a mixture of the two may be present. 

 The aperture is bluish white within, which is also the color of the ex- 

 panded and reflected peristome. Nuclear whorls 1.5, well rounded, 

 smooth. The postnuclear whorls are strongly rounded, appressed at 

 the summit, and marked by slender, retractively slanting, axial hues of 

 growth and also by very fine microscopic spiral stria tions. This 

 scidpture is present on both spire and base. The aperture is broadly 

 ovate, oblique; the peristome is slightly expanded and reflected, a 

 little broader on the insertion of the inner lip where it is somewhat 

 excavated. 



The specimen described and figured (U.S.N.M. no. 255822a) agrees 

 best with the figure published by Pfeiffer in Martini-Chemnitz. 

 It was collected by Col. Edgar A. Mearns on the Mount Halcon Ex- 

 pedition, probably somewhere in the environs of Calapan. It has 5 

 whorls and measures: Length, 33.9 mm; greater diameter, 28.5 mm. 



A series of additional specimens from the same locality yields the 

 following data: 



