84 HELIX-ENDODONTA. 



P. KORORENSIS Beddome. PI. 30, figs. 43, 44, 45. 



Shell very narrowly umbilicate, thin, somewhat discoid ; spire 

 depressed ; color light brown, blotched with a darker shade, trans- 

 versely decussated with about 23 revolving, prominent, thin, wavy 

 ribs, otherwise smooth ; whorls 5, convex ; peristomethin ; aperture 

 lunar circular, furnished with 4 narrow lamellae on the parietal 

 wall and 9 on the opposite exterior wall, all of which run into the 

 shell parallel with the whorl about 4 mill. (Bedd.) 



Diarn. 5^-6, height 4 mill. 



Koror, Pelew Group. 



H. (Endodonta) kororensis BEDD., P. Z. S. 1889, p. 116, t. 12, f. 

 11. 



P. TIMANDRA Hutton. PI. 24, fig. 21, 22, 23. 



Shell small, disk-shaped, the spire flat, inner whorls a trifle sun- 

 ken ; umbilicus broad and shallow; periphery rounded ; color, rich 

 brown, with flames or > -shaped stripes of whitish. Surface sculp- 

 tured with rather separated riblets, which are sinuous above, nearly 

 straight beneath. 



Whorls 4t, slowly increasing. Aperture slightly oblique, roundly- 

 lunar ; peristome thin, simple, the margins converging, forming 

 about three-fourths of a circle. Parietal wall bearing an entering 

 stout lamella ; basal and outer walls each having a short fold, some- 

 times absent. Alt. 1, diam. 3 mill. 



Auckland, New Zealand. 



Patula timandra HUTT., Trans. N. Z. Inst. xvi, p. 175, 192. 

 Patula varicosa SUTER, Tr. N. Z. I. 1891, p. 293, t. 22, f. 28, 29 

 (jaw and teeth, the latter figured from an abnormal specimen, teste 

 Suter.) 



This has been said to be a synonym of the Patula varicosa of 

 PfeifFer (Manual III, p. 23) but it is not that species. 



The latter half of the last whorl is depressed below the level of 

 the preceding whorl, but the inner whorls are slightly concave. 

 The teeth are deeply placed within the aperture, and would escape 

 notice unless carefully looked for. The parietal fold seems to be 

 the most constant, being present in young shells. The riblets are 

 markedly sinuous above, and they become subobsolete on the base, 

 increasing a little again as they pass into the wide umbilicus. At 

 the periphery there are five riblets to a millimeter. The following 



