282 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
impressis decussata; spira parum exserta, convexa, sutura impressa ; 
anfr. 5, superne convexi, ultimus paulatim descendens, magnus, 
tumidus, subtus angustior ; apertura subovalis, superne angulata, 
intus livida, obsolete fasciata; peristoma haud incrassatum, albidum, 
marginibus callo junctis, basali expansulo, columellari curvato. Alt. 
ad basin peristomatis 83, lat. 78 mm.; operc. 60 longum, 35 mm. latum. 
Hab.—Siam. ‘Type in the British Museum. 
Numerous specimens of this fine Ampullaria have been received by 
Mr. Preston. They are in all probability from the upper Menam 
valley, but the ex xact locality has not been recorded. The general 
form is that of A. turbinis, Lea, but the present shell is at once 
distinguished by the want of the longitudinal coloured bands on the 
whorls, especially conspicuous inside the mouth, and by the dark 
transverse vertical stripes. The latter are very characteristic ; 
something similar, though not so well marked, is often seen on the 
South Indian form of A. globosa, figured by Hanley (Conch. Ind., 
pl. exiv, fig. 1), under Swainson’s name of A. carinata (A. globosa, 
var. carinata, Nevill, Cat. Moll. Ind. Mus. Calcutta, fasc. E, 
1885, p. 38). 
Family MELANIID. 
32. Metania TuBercuLaTa (Miill.). 
33. Meranra Scuompurcki, Hanley. 
34. MELANIA VARIABILIS, Bens. 
35. Mertanra scasBra (Mill.). 
[‘* All these are very common in the rivers. The large ones 
(ML. variabilis) are sold in the market and eaten by the Laos.”— 
W. M. D.| 
36. Metania BrInoposa, sp. noy. (vel M. sprnata, subsp.). 
Bib VILL Big: 2: 
Testa turrita, subfusiformis, albida, epidermide fusco-olivacea 
induta; spira elevato-conica, apice eroso, sutura haud impressa; anfr. 
ad 6 (34 superstites), convexi, omnibus liris duabus nodiferis spiraliter 
armatis, ultimo etiam costis quatuor, infera subobsoleta, infra medium 
circumdato, apertura elliptico-rhombea, antice et postice angulata, 
intus suleata, sulecis cum costis externis congruentibus; peristoma 
tenue, antice ad basin productum, marginibus callo junctis, externo 
recto, columellari retro-sinuato. Long. 42, diam. 23 mm.; ap. 21 longa, 
intus 12 mm. lata. 
Hab.—Siam, in fluminibus majoribus. Type in the British Museum. 
The nearest ally of this Melania, so far as I can ascertain, is 
M. (Melanoides) spinata, eer from Cachar ae Zool. Soe., 
1872, p. 514, pl. xxx, fig. 1; Conch. Ind., pl. cix, fig. 1), but that 
has a higher spire, the mouth is smaller in proportion, and the 
columella more deeply curved backward above the basal termination 
of the aperture. The sculpture is similar, except that the keels round 
the base are more numerous. Another shell showing some resemblance 
to the present species is that from the Burmese Shan States figured 
