MOLLUSCA OF INDIA. 105 
which is known and which is usually recorded in collections as JV. 
petrosa. Colonel Godwin-Austen informs me that Hutton himself 
transferred his own name petrosa from the Mirzapur shell to the 
Masuri one on the strength of Benson’s statement that the former 
was identical with the Caleutta NV. vitrinoides, in which, as already 
stated, Benson was quite wrong. This species is not figured in the 
‘ Conchologia Indica,’ as far as can see. Whorls six, closely wound, 
the last only slightly deflected, sometimes not at all, in which case, 
of course, the aperture is quite vertical; spire almost or quite flat ; 
periphery rounded; umbilicus resembling that of MJ. petrosa, more 
open than in all other allied species; horny brown colour, smooth 
and polished above and below, margins of aperture distinctly but 
slightly thickened. Type from Naini Tal: diam. 12, axis 44, apert. 
lat. 6, alt. 43 mm.” 
The following extract may also refer to this species; the shells 
from the two localities require examination :— 
“ Nanina vitrinoides ?, Deshayes (J. A. 8. B. vol. vii. p. 215), oc- 
curring in valleys near Subathu. 
‘«‘ At Simla a scarce variety is found ‘ with a rib-like incrassation 
within the aperture, like many of the specimens of another variety 
found in Bengal.’ Attains a large size and animal is of a dark green 
colour ” (Hutton). 
Shells of similar form as the preceding ; sculpture, very fine, regular, 
and delicate longitudinal striation. (See Part III. Plate XXI. 
figs. 9 and 10.) 
MacrocHLAMYs HARDWICKEI, n. sp. (Plate XXIII. fig. 1.) 
Locality. Calcutta, the cemetery at end of Park Street (G.-A.). 
Shell subconoid, slightly tumid below; sculpture regularly and 
delicately striate longitudinally, the strie sharply defined, about 3 
= 7y inch (Plate XXI. fig. 10); colour dull ochraceous brown, 
with a greenish tint; spire conoid, sides rather flat, apex blunt; suture 
moderately impressed; whorls 6, regularly increasing ; aperture 
large, laterally ovate and well rounded on the upper outer margin ; 
peristome thin, straight, suboblique, columellar margin obliquely 
descending and well reflected at the umbilicus, which is not 
concealed. 
Size: maj. diam. 16-2, min. 14°4; alt. axis 7:0, body-whorl 5-2 mm. 
= OCA ree OS So deed teas 3 0-21 inch. 
Animal. Body and tentacles of the same pale grey tint ; the mantle 
is very pale ochraceous, in marked contrast with the rest of the body ; 
the pallial margin is narrow and ill-defined, and the surface of the 
animal peculiarly smooth. A tongue-shaped expansion is situated 
close in at the inner margin of the aperture, given off from the right 
anterior mantle-lobe, and is directed sideways and upwards over the 
periphery towards the apex, and can be extended for 0-15 inch ; 
‘another linguiform expansion, but very small, isto beseen on the lower 
margin a short distance from the umbilicus and reflected back over 
the shell. The mucous gland has a short but pointed lobe above it. 
