328 POLYNESIAN NESOPUP.E. 



striation, which is most noticeable on the penult and next 

 earlier whorls. The whorls are strongly convex, the last 

 having a long but not very deep impression behind the lip, 

 descending obliquely from the upper palatal position. The 

 peristome is expanded and heavily thickened within, ex- 

 cavated at the sinulus. The angular and parietal lamellae 

 are much longer than in N. tantilla but similar in shape, the 

 angular being straight within, then curving out to join the 

 lip, the parietal well curved and entering deeply. There is a 

 well-developed infraparietal lamella. The columellar lamella 

 is deeply placed, ascending slowly within, then abruptly bent 

 downward along the axis (fig. 9). Below it a tubercular 

 subcolumellar nodule projects; this is probably a displaced 

 basal fold. Within the outer lip there is a thin, high, diag- 

 onally descending upper palatal fold and a small, tubercular 

 suprapalatal. The lower palatal fold is immersed, basal in 

 position, straight, and shorter than the upper. 



Length 2.2, diam. 1.3 mm. ; 5% whorls. 



Society Is.: Borabora (Garrett). 



Vertigo armata, PEASE, Proc. Zool. Soc. Lond., 1871, p. 461. 

 Pupa armata Pease, PFEIFFER, Monographia, viii, p. 407 

 (copied from Pease). 



Described from the type, figured from the type and another 

 of the type lot, no. 48315 M. C. Z. It is well distinguished 

 by the oblique, lamellar upper palatal fold, the wholly basal 

 lower palatal, the long lamellae of the parietal wall and 

 numerous teeth, 8 in all. Fresh specimens evidently have 

 cuticular laminae on the striae. Pease says "interdum re- 

 mote, tenuiter filocostata . . . filis albidis"; but these have 

 been worn from the type specimens. N. tongana (Bttg.) ap- 

 pears from the description to be somewhat similar. 



24. NESOPUPA PAIVAE (Crosse). PL 30, figs. 7, 8. 



"Shell not very deeply umbilicate, ovate-ventricose, thin, 

 subpellucid, pale chestnut; spire with obtuse somewhat flat- 

 tened apex. Whorls 41/2, very convex, the embryonic I 1 /! 

 smooth, whitish, flattened, the rest ventricose, impressed with 

 rather oblique, somewhat distant striae, easily seen without a 



