452 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



1898. Helicostyla virginea Mollendorff, Abh. Naturf. Ges. Gorlitz, vol. 22, 



p. 132; in part. 

 1901. Cochlostyla virginea Hidalgo, Obras malacologicas, pp. 486-487; in~part. 

 1912. Helicostyla virginea Mollendorff, Kobelt, and Winter, Semper's Reisen 



im Archipel der Philippinen, vol. 10, p. 257; in part. 



1932. Cochlostyla (Eudoxus) albina Bartsch, Journ. Washington Acad. Sci., vol. 



22, p. 338. 



1933. Helicostyla (Eudoxus) virginea Clench and Archer, Papers Michigan 



Acad. Sci., Arts, Letters, vol. 17, p. 544; in part. 



Shell regularly ovate, thin, bluish white, with a pale bluish-green 

 tinge on the base. There is a slender white line immediately at the 

 summit of the shell, marking the appressed portion of the summit. 

 Nuclear whorls 2, strongly rounded, smooth, forming a conical apex, 

 marked by incremental lines and on the last half by fine spiral stria- 

 tums. The postnuclear whorls are rather high between the summit 

 and suture and moderately well curved and marked by feeble lines 

 of growth and microscopic spiral striations, which are present on 

 both spire and base, although they are scarcely perceptible on the 

 base. Suture slightly constricted; periphery of the last whorl inflated 

 and well rounded. The base is rather long, somewhat inflated, evenly 

 rounded. Aperture oval, oblique; the outer lip scarcely at all ex- 

 panded or reflected. There is the merest trace of a curl shown. The 

 inner lip or columella is also exceedingly narrow and threadlike, pass- 

 ing without interruption in an even curve into the basal lip. The 

 columellar area and parietal wall are covered by a thin whitish callus. 



The specimen described and figured (U.S.N.M. no. 255828), col- 

 lected by Col. Edgar A. Mearns on the Mount Halcon Expedition in 

 Mindoro, has 4.5 whorls and measures: Length, 34.3 mm; greater 

 diameter, 24.2 mm; less diameter, 20.6 mm. 



