366 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



to the periphery. The peristome is flesh-colored; the interior of the 

 outer lip is brown. The first postnuclear whorl is marked by fine 

 incremental lines and fine spiral striations ; the succeeding ones, except 

 the last half of the last turn, are strongly malleated on the anterior 

 half and marked by feeble incremental lines and rather strong spiral 

 striations on the upper surface, as well as on the base of the last 

 whorl where the spiral striations are even stronger. On the first 

 half of the last whorl of the base there are moderately strong mallea- 

 tions between the brown band and the periphery, the depressed por- 

 tions being brown. The aperture is broadly oval; the peristome 

 reflected, expanded, and thickened, covering about half of the umbili- 

 cus. The inner lip bears a conspicuous fold on its middle. 



Type.— The type, U.S.N.M. No. 382888, is one of a series of speci- 

 mens collected by Pedro de Mesa at Paluan, Mindoro. It has 4.9 

 whorls, and measures: Height, 13.1 mm; greater diameter, 27.9 mm; 

 lesser diameter, 22.3 mm. 



Remarks. — Ten additional specimens, U.S.N.M. No. 382889, from 

 the same source yield the following information : 



•Type. 



Two, U.S.N.M. No. 256408, collected by the United States Bureau 

 of Fisheries Albatross Expedition, yield the following measurements: 



22. 4 

 22.4 



U.S.N.M. No. 382890 contains a specimen collected by Pedro de 

 Mesa at Tara, Abra de Hog, Mindoro, which measures: 



