280 HAWAIIAN NESOPUPAE. 



d~. Whorls convex ; length of shell less than 

 1 .65 mm. N. dispersa, no. 4. 



a~. Angular lamella terminating on the parietal margin near 

 the insertion of the outer lip, not united to the lip insertion 

 by a thick callus. N. baldwini, no. 5. 



1. NESOPTPA PLICIFERA Ancey. PI. 27, figs. 1, 2, 3. 



"Shell small, ovate, dark reddish brown, somewhat thin, 

 slightly shining, except for the apex obliquely and closely pli- 

 cate, plica? smooth, distinctly perforate. Spire obtuse, ovate 

 or cylindrically ovate. Whorls 5, noticeably slightly convex, 

 suture impressed and simple, the last whorl tapering at the 

 base, concentrically sulcately impressed, with the sulcus cor- 

 responding to the lower palatal lamella, slightly compressed 

 about the umbilical crevice. Aperture hardly oblique, reced- 

 ing slightly at the base, ovately truncate, furnished with 

 lamella?., as follows: two parietal, of which the upper angular 

 extends to the upper margin, and is connected with the outer 

 margin; strongly elongated; the lower [parietal lamella j is 

 large, a little deeper seated, extending slightly spirally. One 

 small, acute, tooth-like., columellar. Finally, two elongated 

 palatals, parallel, the upper almost reaching the margin. 

 Peristome brown, thickened, narrowly expanded, with distant 

 margins, united by an inconspicuous callus, the upper sub- 

 angularly produced outwardly. Length 1.5, diam. hardly 1, 

 aperture 0.5 mm. long. Oahu, Nuuauu (Thaanum) " (Ancey). 



Ncsopupa plicifera Anc. Proc. Malac. Soc. London, vi, 1904. 

 p. 122, pi. vii, f. 14. Type 18703, paratypes 18740 Bishop 

 Museum. 



Aucey's material consists of the type and 4 paratypes. The 

 angular lamella is slightly curved and is united with the 

 junction of the outer lip by a thick callus, forming, witli the 

 upper palatal fold, an almost circular sinulus. In immature 

 specimens of 4y 2 whorls, from the type locality on the slopes 

 of upper Nuuanu, just south of the Pali, the embryonic 

 whorls are almost smooth, under a high-power lens very 

 minutely granulose for the first 1% whorls, then, almost ab- 

 ruptly rather strong, sharp, oblique costa? set in. In adult 



