362 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Last whorl not malleated. 



Spiral sculpture on the upper surface of last whorl strong. 



Interrupted spiral brown band conspicuous on base rnansalayana. 



Interrupted spiral brown band not conspicuous on base. 



Shell depressed-helicoid medioensis. 



Shell not depressed-helicoid. 



Shell conic mangarina. 



Spiral sculpture on upper surface of last whorl not strong, but 

 feeble. 



Shell depressed-helicoid verdensis. 



Shell not depressed-helicoid. 



Shell conic cagurayana. 



OBBA PLANULATA LUBANGENSIS, new subspecies 



Plate 91, Figure 5 



The shell is depressed-helicoid. The nuclear whorls are flesh- 

 color, which is also the ground color of the postnuclear turns, but 

 these are spotted, streaked, and vermiculated with brown, there being 

 a concentration of these markings midway between the summit and 

 the periphery to form an interrupted spiral band. A second band of 

 this type is present on the base about one- third of the distance between 

 the periphery and the umbilicus. The base is also finely spotted with 

 brown markings. The nuclear whorls are about 1.4, and are marked 

 by fine incremental lines. The first one and one-half postnuclear 

 whorls are a little more finely sculptured than the succeeding turns, 

 which are decidedly rough and strongly malleated from the summit 

 to the suture, the malleations extending to the peristome on the last 

 turn. The under surface also is malleated and rough. The aperture 

 is oval; the peristome is strongly thickened, reflected, and covers about 

 one-third of the umbilicus at the parietal wall. There is a broad, 

 median tooth on the inside of the basal lip. 



Type— The type, U.S.N.M. No. 382702, was collected by myself 

 on the top of Gunting Mountain, Lubang Island. It has 5 whorls, 

 and measures: Height, 14.1 mm; greater diameter, 30.2 mm; lesser 

 diameter, 23.5 mm. 



Remarks. — Seven topotypes, U.S.N.M. No. 256527, furnish the 

 following additional measurements: 



