1863. | Contributions to Indian Malacology. 323 
3. ALyomuSs VULCAN, n. s. 
Shell moderately umbilicated, depressly turbinate, thin, translu- 
cent, varying in colour from amber to nearly white, rather closely 
costulated throughout, more strongly upon the inflated portion of 
the last whorl, and very closely ribbed within the umbilicus. Spire 
conoid, apex blunt, deep rufous ; suture impressed. Whorls 4, round- 
ed, the last moderately swollen at the side, then constricted, and 
swelling again slightly towards the mouth. Constriction smooth ; 
sutural tube of moderate length, about 2 mm. Aperture oblique, 
round, peristome crenulately waved on the outer edge, the lowest 
crenulation forming a rudimentary channel at the base; peristome 
double, the inner alone continuous, both lips somewhat expanded. 
Operculum thin, horny, distinctly multispiral, very concave exter- 
nally, internally convex and with a prominent central nucleus. 
mm. inch. 
INIA ONMCIATII Ss “neeeelcceiiss cesses actos | Ate 0.18 
IMitwonrsclitGsrcsnce cesses ascents. ss cues CO: 0.14 
IAM AD se ware ee tion chiens coe tay t ellic 0.05 
Habitat.—This species abounds on the upper portion of the isolated 
peak of Puppa, an extinct volcano lying about 40 miles E. 8. HE. of 
the town of Pu-gadn in the territories of the king of Ava. It is a 
more globose form than either A. Succineus, mihi, or A. polygonoma, 
mihi, to which it is allied. ‘The crenulation of the mouth is perhaps 
more marked than in any other Burmese species. 
4. ALyomus AVA, n.s. 
Shell depressed, openly umbilicated,thin, closely costulated through- 
out, more strongly upon the inflated portion of the last whorl, white 
or light amber in colour. Spire very depressly conoid, apex blunt, 
suture impressed. Whorls 4, the last very little inflated at the side, 
then moderately constricted, constriction rather long, swollen in the 
centre, indistinctly costulated. Sutural tube short, about 14 mm. in 
length. Aperture circular, diagonal. Peristome thickened, double, 
external lip expanded, inner continuous and projecting slightly atthe 
base. Operculum, thin, horny, multispiral, very concave externally 
and convex within, wanting the central boss. 
