Species of Diplommatina, Opisthostoma, dc. 245 
done, and is still doing, much valuable work in connexion 
with the study of the Mollusca. 
Diplommatina tenuilabiata, sp. n. 
Shell dextral, imperforate, ovate-conic, light red-brown, 
subpellucid ; whorls 7, convex, ornamented above with faint 
oblique coste, last two whorls almost smooth, penultimate 
much larger than the last; aperture subcircular; peristome 
thin, with raised inner margin; columella thin, vertical, with 
a moderately prominent entering plait. 
Alt. 22 millim.; diam. maj. 14 millim. 
Hab. Banguey Island (Everett). | 
In general form similar to D. onyx, but with a semitrans- 
parent appearance, and further distinguished by its larger 
penultimate whorl. 
Diplommatina oviformis, sp. n. 
Shell dextral, ovate, imperforate, very pale yellow, sculp- 
tured with oblique, very close-set coste ; whorls 64, convex, 
the penultimate slightly wider than the last; aperture sub- 
circular ; peristome somewhat thickened, inner margin slightly 
raised ; columella lip almost erect, slightly incurved at the 
middle; columella plait prominent. 
Alt. 22 millim.; diam. maj. 14 millim. 
Hab. Darjeeling, India. 
In general form very like D. ungulata, Blanf., but without 
the peculiar projection on upper part of the peristome, which 
is almost circular in D. oviformis, whereas in D. ungulata 
it is angular at the basal portion and turned slightly outwards 
towards the left hand. 
Diplommatina regularis, sp. n. 
Shell dextral, ovate-conic, imperforate, creamy white, 
ornamented with very distinctly raised, thin, oblique coste ; 
whorls 7, very convex, first five regularly increasing in diameter, 
last two about equal; aperture circular; peristome slightly 
expanded, double ; columella plait rather deeply inserted. 
Alt. 23 millim.; diam. maj. 1 millim. 
Hab. Darjeeling, India. 
I know of no Indian species nearer to this than D. pudlula, 
Bens., which is smaller and has closer and much less 
prominent coste. 
Ann. & Mag. N. Hist. Ser. 7. Vol. viii. 18 
