326 POLYNESIAN NESOPUP^E. 



tubercle may be seen. The peristome is thickened a little, 

 well expanded. 



Length 2.25, diam. 1.3 mm.; nearly 5 whorls (type). 



Length 2, diam. 1.35 mm. 



G-arrett, in his several lists, included dunkeri, armata, 

 pleurophora and dentifera as synonyms of tantilla, which he 

 says ranges from the Society to the Viti Islands, and is found 

 beneath rotten wood, under stones, and among decaying leaves. 

 Boettger gives tantilla an equally wide range, but he distin- 

 guishes 5 varieties and 2 subspecies. In the absence of inter- 

 grading individuals it appears more logical to rank part of 

 these as species. Typical tantilla is at present known posi- 

 tively from Tahiti only. Mr. Ancey mentioned a P. pazi 

 Crosse, stating that it does not differ specifically from tantilla ; 

 but I cannot find that Crosse described such a species. 



22. NESOPUPA PLEUROPHORA (Shuttleworth). PL 30, figs. 5, 6, 



Shell minute, rimate-perforate, shortly ovate, thin, slightly 

 striate, beautifully ribbed with very thin, widely-spaced 

 lamella?, sometimes vanishing, rufous chestnut, somewhat pel- 

 lucid, slightly glossy. Spire rounded, obtuse. Whorls 5, 

 strongly convex and somewhat inflated, the last rounded at 

 the base. Suture deep. Aperture rounded auriform, with 

 seven folds : angular lamella strong ; parietal strongly ele- 

 vated, somewhat immersed ; two columellar lamellae, the upper 

 strong, lower small ; three immersed palatal folds, the middle 

 one smaller. Peristome expanded, callous-lipped, whitish, 

 right margin angularly sinuous above, somewhat tuberculate 

 below the sinus. 



Length about 2, diam. 1%, aperture % mm. (ShuttL). 



Marquesas Islands and Tahiti (Verreaux). 



Pupa pleurophora SHUTTLEWORTH, Bern. Mittheil., 1852, 

 p. 296. PPR., Monogr. Hel. Viv., iii, 560. [Pupa tantilla] 

 var. pleurophora Shuttlw., BOETTGER, Conchol. Mittheil., i, 

 1881, p. 51, pi. 10, f. 3. Pupa dunkeri ZELEBOR, in Pfr., 

 Monographia, vi, 1868, p. 333 (Taheiti). 



Tahiti may be selected as the type locality. Under the 

 microscope the surface is irregularly granose or vermiculate- 



