112 COL. R. H. BEDDOME ON NEW [Mar. 5, 
3. Descriptions of Land-Shells from the Island of Koror, 
Pelew Group. By Col. R. H. Beppome. 
[Received February 19, 1889.] 
(Plates XI. & XII.) 
The following interesting shells were collected for Dr. Hungerford 
by Mr. Gibbon, who resides in Koror, or Coror, one of the Pelew 
Islands. 
1, DipLOMMATINA LUTEA, sp. nov. (Plate XI. figs. 1, 1a.) 
Shell sinistral, broad ovate, not rimate, thick, yellowish, irregularly 
blotched with black towards the apex: whorls 63-7, gradually in- 
creasing downwards, the penultimate being the largest; sculpture a 
fine, close, regular oblique striation across all the whorls, last whorl 
ascending much on to the penultimate; a slight constriction on the 
penultimate, just above the columellar margin: peristome very thick, 
3 breadth of shell, dilated at its outer margin; inner lip much ex- 
panded, shining, continuous round the apex of the aperture, where it 
is faintly striated across: aperture vertical, subquadrate, furnished 
with a tooth-like process on the columellar margin, which is lamella- 
like, running back into the shell. Length 33 millim. 
Hab. Koror. 
The peristome of this and the five following species is of very 
great thickness in comparison with the size of the shell, much more so 
than in any Indian species with which I am acquainted; it might be 
misguiding to describe the peristome as double in these species when 
the outer margin is dilated, and single when there is no dilatation, 
as this dilatation certainly varies in different individuals of the 
same species and may be altogether absent, or more or less prominent 
in the same species. 
I do not see how the subgenus Palaina can be kept up for these 
Pacific species of Diplommatina, as they differ more amongst them- 
selves than many of them do from Himalayan forms, and the same 
may be said of Diancta and Pazillus. 
2. DIpLOMMATINA PLATYCHEILUS, sp. noy. (Plate XI. figs. 2, 
2 a.) 
Shell sinistral, ovate, fusiform, thick, inconspicuously rimate, dull 
brick-coloured: whorls 63-7: sculpture, the upper 13-2 minute 
whorls glabrous or very finely striated, the 3rd and 4th with prominent 
coarse, rather thick ribs, the antepenultimate partly furnished with 
similar ribbing, and partly with a close fine striation, penultimate 
finely striated, the last whorl furnished with a few swollen convex 
ribs ; penultimate much the largest and most swollen, with a slight 
constriction above the columellar margin; last whorl not ascending 
much on to the penultimate: peristome very thick, about 3 breadth 
of shell, finely costulate outside, the inner lip continuous: aperture 
much broader than high, transversely auriculate, narrowing inwards 
