1872.] W. Theobald & F. Stoliczka — Motes on Burmese Land Shells. 331 
on all the whorls of the Arakanese specimen ; the difference is, however 
not sufficient to indicate a specifically distinct shell from the one above 
named. 
4. L). exilis, Blf., was found on the limestone hills at Damotha and at 
the Farm-caves near Moulmein. Most of the specimens somewhat exceed 
in size those from Upper Banna ; the costulation of the whorls also is a shade 
finer, though variable in different specimens, and the outer lip of the aperture 
a little more expanded ; however, the general form, character and proportion 
of the whorls is exactly the same. One of the largest specimens measures : 
total length 3 2, diameter of penult, whorl 1", diam. of apert. with perist. 0'9 
m.m. ; it has nine whorls. 
5. Z>. nana, described by Mr. W. T. Blanford from Pegu, also occurs 
near Moulmein ; the specimens only are a trifle smaller than the type shell, 
but they are very distinctly transversely costulated. 
6. Diflommatina angulata, n. sp. PI. xi. Fig. 3. 
L). testa ovoto elongata, dextrorsa, vix rimata, sordide alhida, anfractu 
penultimo latissimo, apice obtusiusculo, pollute rulido, submammillato ; 
anfractibus sex, primis duobus hevigatis, cceteris valde convexis, ad peri- 
pheriam plus minusve distincter angulatis, transversim confertissime costellatis 
aut acute striatis ; ultimo basi contract o ; sutura profunda, simplice ; aper- 
tura late circulari, peristomate undique expanse, bilabiato, inferno subrecto, 
ad marginem columcllarem dente obliquo instructo, externo ad anfractum 
penultimum constrictum modice ascendente. Long. 2, lat. maxima 08, diam. 
apert. 06 m.m. 
Sab. Prope Moulmain, provincia Martaban. 
The peculiar angulation of the whorls, combined with the very close 
transverse costulation, or almost striation, and the proportionately large 
aperture readily separate this species from any other as yet known. Mr. 
Theobald obtained numerous specimens on the limestone hill near Damotha, 
and also south of Moulmain, together with JJ. carneola, Stol. 
7. Difiommatina Richthofeni, n. sp. PI. xi. Fig. 4. 
Dipl, testa ovate elongata, iurrita, dextrorsa, alhida, , rimata ; spira 
conoidea ; anfractibus septem, convexis, ad medium subangulatis, sutura 
simplici junctis, penultimo ultimo latiore : primis d yob us apiccm formant ibus 
Icevigatis, cceteris transversim conferte costellatis, ultimo basi convexo, angus- 
tato, supra ad anf. penultimum ascendente ; apertura parva, circulari, peris- 
tomate duplici : inferno tubuliforme modice producto atgue dilatato ; labio 
ad basin dente obliquo et inaguo instructo. Long. 2'5, lat. maxima 0'8, diam . 
aperturce 0’5 m.m. 
Sab. Prope Moulmain ; {testa rarissima). 
