HAWAIIAN NESOPUPAE. 305 



Hawaii: Olaa (D. Thaaimm), type 18701 Bishop Museum, 

 topotypes 44678 A. N. S. P.; Glenwood, in moss on tree 

 trunks, abundant (Thaauum, Pilsbry). 



Nesopupa thua-numi (ANCEY), Proc. Malac. Soc., London, vi, 

 June 1904, p. 123. 



Unfortunately the holotype from the Aucey collection is 

 badly broken. This species is very abundant in the type 

 locality, where it is found on tree-trunks, living among and on 

 the fronds of a loose-growing species of moss. Under similar 

 conditions this species has been found in nearly all the 

 Hawaiian Islands. P. thaanumi is somewhat similar to P. 

 iff xlcyana tryphera. Its shell is, however, smaller, more com- 

 pactly coiled, much lighter colored and the aperture is more 

 crowded with the five lamella?. It has apparently some re- 

 lationship to the species included in Nesopupa- ss. It differs 

 from all the species of the latter by its more convex whorls 

 and especially by the membranous character of its rather dis- 

 tant riblets. Immature specimens from the type locality have 

 the embryonic whorls very minutely spirally striate. The 

 angular lamella is strong, long and slightly sinuous, high in 

 front, tapering gradually backward, and does not terminate 

 on nor is it joined to the outer lip, but extends to the margin 

 of the parietal wall. In this character it resembles species of 

 Xcsopupa ss. with this distinction: that in thaanumi this 

 lamella is stronger, with a more sinuous margin and the outer 

 portion is not parallel to the parietal, but is distinctly bent 

 towards the outer lip. The parietal lamella is only slightly 

 more deeply seated than the angular, and emerges almost to 

 the margin on the parietal wall. It is very strong, high and 

 long, and is nearly perpendicular to the parietal wall. The 

 columellar lamella is very strong, horizontally seated, rather 

 long, diminishing rather abruptly inward, there turning up- 

 wards and accompanying the columella as a mere thread. The 

 two palatal folds are nearly parallel, about equal in height 

 and length ; the lower slightly more deeply seated ; the upper 

 extending nearly to the margin of the outer lip, with its free 

 edge abruptly bent, almost at a right angle, towards the 

 lower palatal. 



