* T T r^CA INHABITING SOCIETY ISLANDS. 
32 terrestrial MOLLLSCA 
*iSZaKKe<l 'vi* Tpex fiat, stturc channeled; 
crowded, snbbiarcixate riblcts, p e suture, slowly ixud regularly 
whorls five, narrow, • base convex; umbilicus moderate, 
increasing, last one rounded P ^ aperture vertical, narrow, orbicular- 
iml XwHnd the palate wiih four (rarely three or bve) lamium ; 
peristome thin, straight, with remote margins. 
Major diam. 3, height mill. 
ftmewllar^re^^r^^^^^^ confined to a valley on the north end of Huaheine. It 
differs ?;rU-ie«/in having the riblets ntneh fntthet apart, deeper channeled 
suture and the whorls angulated next to the suture. 
P.PUNCTiPKRFORATA, Garrett. Plate II, figs. 16,16 a, 16 &, 16 c. 
Slicll siinall, perforated, orbicnlar, depressed, thin, corneous, tessellated ahoTC with 
reddish brown, beneath corn-color, or radintely striped with the same hue; stine vert 
closely set, thin, rib-like, subarcuated, smaller and more crowded beneath ; spne 
convenorconvexlyroraidod; apex planulate ; suture deeply impressed; whorls six, 
roiiiidod, narrow, regularly and slowly increasing, last one not descending in Iront, 
gibbous above ; base convex ; umbilicus very small, puuctiform ; aperture vertical, 
narrow luniform ; parietal region with two (rarely three), and the iialate witli from 
four to five lainime, one of which is columellar ; besides the laminm there exist parallel 
raised lines both on the wall of the aperture and in the palate ; peristome thin, simple, 
with remote margins; columella thickened with callus. 
Major diam. 3, height Ij mill. 
JIab . — Moorea Island. 
A few examples w'ere found at the above locality, but not obtained in any other 
jiart of the group, liie minute umbilicus will at once distinguish it from any other 
Soi icty Island species. One specimen is uniform pale horn-color. 
P. Boraborensis, Garrett. Plate II, figs. 18, 18 a, 18 6. 
iSliell orbicular, depressed, widely umbilicated, thin, corneous under a light brownish 
epidermis ; above tessellated, beneath with or without undulating stripes of a dark 
chestnut-brow'n ; sculpture consisting of small, thin, crowhed slightly waved riblets ; 
spire but little elevated, apex fiat ; suture deeply impressed ; whorls seven, convex, 
very slowly increasing, last one subangulate, base convexly rounded ; umbilicus large, 
perspective, exhibiting all the whorls ; aperture subvertical, ovate-lunilbrm ; parietal 
region with four and the palate with five or six laminae, peristome simple with remote 
margins. 
Major diam. 5, height mill. 
Hah . — Borabora Island. 
