144 Journal of the Asiatic Society of Bengal. [N.S., XV, 
anteriorly by a coarse Hela aatae steeply twisted ridge. The 
columellar lip, which has a well-defined edge along the aper- 
ture, carries thirteen coarse dentiulations, omitting the ter- 
al anterior columellar ridge and the terminal posterior ridge 
e posterior outlet. The more gird ae and more 
ominent and extend externally over the entire width 
of the reHeeAl surface on the right side of the shell, bifurcating 
ore or less irregularly towards the margin, so that the dorsal 
Wea bbs ond are more numerous than the apertural denticula- 
tions. 
Except for a few extremely thin lines of sienna, emphas 
ing some of the crenulated ridges towards the octreniieaee 
of the shell, and for two pale purplish-brown margina 
small patches, situated, one on each side, at half the length 
aspects, the entire shell is practically colourless; the swollen 
margin, ventral surface and aperture being ver y pale creamy- 
white, the dorsal surface ver ale presadhowhien, of an 
opaque porcellaneous texture, suffused Bh small spots of 
a vitreous texture which causes them re a as slightly 
darker stains in pi opaque enweaanr glaze 
Dimensions 
ae ay ay ay .. oo mm. 
Wid ie Gece fy 
Pee aokeal diameter . eg | eee 
Occurrence —New-B 
oer with prions rie —Although the development 
of the marginal rim, in the above described shell, is moderate, 
yet the yentral ridges and dorsal erenulations are sharper 
and more prominent than in any othe cera at 
ca ascer 
from available information. Judging from the ors glazed 
condition of the shell, and also the presence of the lateral 
patches, it is extremely unlikely that the sahdleiveli can be 
