340 EAST INDIAN NESOPUP^E. 



equal in diameter. The color is near olive-buff, the shell 

 slightly translucent with but little gloss. There are narrow 

 riblets at wide, unequal intervals, chiefly on the penult whorl, 

 and under the microscope weak interstitial striae and some 

 irregular pitting are visible. The whorls are strongly convex. 

 The last whorl has a rather deep, horizontal impression be- 

 hind the outer lip, over the upper palatal fold. The aperture 

 has five to eight teeth. The angular lamella is strong and 

 curves outward to join the outer margin. It is low in front, 

 with a depression before the higher part inward; this seen 

 foreshortened was what Brown referred to as medio valde 

 in-ciso. The parietal lamella is very high, strong and long, 

 also curved. Infraparietal small, elongate. Columellar la- 

 mella is strong and ascends a little inwardly. There is a 

 small transverse basal tubercle in the most fully developed 

 shells, but wanting or very inconspicuous in some apparently 

 adult. The two palatal folds are long, the lower one longer 

 and more deeply immersed. In some individuals there is a 

 small, tubercular suprapalatal. The peristome is well ex- 

 panded and strongly thickened within, the callus whitish. 

 Sinulus defined by a thickening in the outer lip. 



Length 2, diam. 1.2 mm. ; scarcely 5 whorls. 



Length 2.15, diam. 1.2, aperture 0.85 mm. ; 5y s whorls. 



The variation in number of teeth is due to the absence 

 some examples of the basal, suprapalatal and infraparietal. 

 Figures 1-3 represent specimens from A. D. Brown. There is 

 a set of moreleti in the collection labeled "P. pnnctilucens 

 Issel, Borneo," probably = [Pupa (Istmia)] punctilium 

 Issel, Borneo, Paetel, Catalog, 4th edit., 1889, ii, p. 303, nude 

 name. 



Shells from Penon de Bintuan agree well with the Labuan 

 form, having 8 teeth, the developed sculpture well developed. 



Length 2.2, diam. 1.23 mm. ; 5 whorls. 



Small examples from Montalban have a suprapalatal and a 

 small basal fold but no infraparietal. The riblets are few 

 and weak. Length 1.8, diam. 1.15 to 1.2 mm. 



Both of the above lots were from the Quadras collection, 

 and labeled Pit-pa moellendorffi Bttg. 





