282 HAWAIIAN NESOPUPAE. 



deep suture. Whorls 5, the first rather large, nearly smooth, 

 under a high-power lens very minutely wrinkled ; the second 

 slightly narrower than the first, becoming costulate rather 

 abruptly near its termination ; the rest of the whorls increasing 

 slowly and evenly, regularly and strongly costulate; riblets 

 strongly oblique, with rounded edges, on the penultimate whorl 

 about 0.055 and on the last whorl about 0.14 mm. apart (or 

 partly obsolete) ; the interstices microscopically wrinkled, the 

 wrinkles short; last whorl slightly broader than the penult, 

 tapering to the base, scarcely ascending near the aperture, 

 bisulcate, the sulci deep, corresponding to the palatal plicae, 

 the lower strongly curved, deep, broad, remote from the peris- 

 tome, the upper arched, not quite so deep, nearly reaching 

 the peristome, the two separated by a convex ridge. Aperture 

 irregularly truncate-ovate, small, slightly oblique, contracted, 

 its outer margin slightly sinuous, its lip insertions converging, 

 nearly united by a thick callus. Angular lamella long, slightly 

 curved, slender, not very high, extending to the margin of 

 the outer lip just before its insertion. The parietal lamella 

 is deeper seated, stronger and slopes outward. The columellar 

 lamella is strong, at first horizontally entering, then descend- 

 ing around the columella. The upper palatal fold is long, 

 lamella-like, nearly reaching the peristome, with a depression 

 just in back of its outer end. The lower palatal fold is very 

 deeply seated, with a dentiform nodule close to and below its 

 outer end. The outer margin of the peristome is slightly thick- 

 ened within, scarcely expanded, the columellar margin 

 broadly expanded. 



Length 1.41, diam. 0.8, diag. length of aperture 0.5 mm. 

 Cotype. 



Length 1.41, diam. 0.85, diag. length of aperture 0.52 mm. 

 Cotype. 



Oahu: Waianae Mts. at Pukaloa, in the open valley under 

 stones near the "Hunter's Cabin/' type loc. : Lualualei, near 

 the head of the valley (Cooke) ; Kawaihapai at the western 

 end of the range, fossil in soil of the plain and slopes of the 

 foothills (Cooke & Pilsbry). 



This species is closely related to N. plicifera. The angular 



