296 HAWAIIAN NESOPUPAE. 



wrinkled ; the lamellae and plicae of the aperture have about the 

 same development as in specimens from Palihoukapapa, except 

 that the angular lamella is slightly longer and stronger. One 

 of the specimens measures: length 1.83, diam. 0.98, apert. 

 (diag.) 0.73 mm. 



There is but a single slight difference between these speci- 

 mens and those collected by Gouveia at Waihou. In the latter 

 the angular lamella is considerably longer, otherwise they 

 agree perfectly. 



10. NESOPUPA BISHOPI C. & P., n. sp. PL 28, fig. 4. 



The shell is minute, perforate (perforation very minute, 

 nearly closed), nearly cylindrical, argus brown, lighter colored 

 above, rather thin, translucent, with an oily sheen, minutely 

 very weakly striate. Spire with nearly parallel outlines below, 

 tapering above to a somewhat obtuse apex. The individual 

 whorls somewhat convex, separated by a rather shallow, suture. 

 Whorls 5%, the embryonic 11/2 nearly smooth, under a strong 

 lens minutely indistinctly punctate ; rest of the whorls faintly 

 striate, striae weak, oblique, discontinous ; under the microscope 

 the whole surface is .seen to be covered with minute short 

 wrinkles; last whorl cylindrical, tapering towards the base, 

 ascending slightly and slowly near the aperture. Flattened 

 outside of the palatal plicae, having a very small impression 

 over the lower one, and slightly swollen just before reaching 

 the aperture. Aperture truncate-ovate, scarcely oblique, 

 nearly perpendicular, the lip insertions remote, not united 

 by a callus. Angular lamella deeply seated, weak, short, 

 about one-half the height of the parietal ; parietal lamella 

 stronger, emerging further, nearly perpendicular to the 

 parietal wall ; columellar lamella weaker than in most species 

 of this group, short, horizontally inserted on the columella 

 and deeply seated. Two palatal plicae of about equal length, 

 rather short, not approaching the peristome and nearly 

 parallel, the upper emerging slightly further than the lower. 

 Peristome very slightly thickened, the columellar margin ex- 

 panded, the lower and outer margins nearly erect. Length 

 2.08, diam. 1.1 ; apert., greatest length 0.8 mm. 



