POLYNESIAN NESOPUP^E. 329 



lens, the last whorl ascending, about equal to the spire, 

 rounded-tapering at base. Aperture truncate-rounded, vio- 

 laceous-fleshy, narrowed by 9 teeth: on the parietal wall 3, 

 the first rather large, somewhat projecting forward and con- 

 tinuous with the lip, the second largest, entering, the third 

 minute; on the columellar margin 2 unequal teeth within; 

 in the basal and outer margins 4 deeply placed teeth. Peri- 

 stome somewhat expanded, reflected, the margins separated, 

 columellar margin spreading, broadly expanded, the middle 

 of the outer margin more or less bent in. 



"Length 1.75 to 2, diam. 0.75 mm." (Crosse). 



Gambier Islands (Crosse) ; Mangareva (Pease). Paumotu 

 Group (Bttg.). 



Pupa paivae CROSSE, Journ. de Conchyl., xiii, 1865, p. 218, 

 pi. 6, f. 5. PFEIPPER, Mon. Hel. Viv., vi, 333. Vertigo paivae 

 Cr., PEASE, P. Z. S., 1871, p. 474, Mangareva. [Pupa tan- 

 tttla] var. paivae Crosse, BOETTGER, Conchol. Mittheil., i, p. 

 50, pi. 10, f. 2. 



Boettger, who had specimens (pi. 30, figs. 7, 8) given by 

 Crosse to Pfeiffer, notes the discrepancy between Crosse 's 

 term ovato-ventricosa and his measurement of diameter, % 

 mm. He notes the relationship to pleurophora "so great 

 that a specific separation from this, and therefore also from 

 typical P. tantUla Gould, is evidently not to be thought of." 

 He gives the following comparative description : 



Shell rather thick, pale brown, more distinctly costulate; 

 last whorl more tapering and anteriorly dilated funnel-like. 

 Aperture generally 7-toothed : 1 angular, 1 or 2 parietals, the 

 inner one smallest, often wanting; columellars 2, the lower 

 one small; palatals 3, equidistant and subequal. Peristome 

 generally discontinuous, somewhat thickened. Length 1% to 

 2, width iy 8 to 11/4 mm. 



25. NESOPUPA DENTIPERA (Pease). PL 30, fig. 14. 



"Shell cylindric, rather solid, perforate, dextral. longitu- 

 dinally obliquely very finely striate, rufous- or yellowish- 

 chestnut. Whorls 4, convexly rounded, the last shortly bi- 

 sulcate behind the lip. Aperture nearly circular, biplicate 

 posteriorly, columella 1-plicate, base 3 or 4-toothed; lip 



