1866. | Contributions to Indian Malacology. 33 
sculpture, dull fulvous brown, horny, rather lighter in colour just 
above the periphery and around the umbilicus. Spire convexly 
conoid, apex very obtuse, suture scarcely impressed. Whorls 43, 
slightly convex ; the last bluntly carinate, descending very little near 
the aperture, tumid beneath, compressed around the umbilicus. Aper- 
ture large, diagonal, truncately sub-circular; peristome white, sub- - 
expanded, margins approaching each other, columellar margin nearly 
vertical, rather broadly reflexed, partly covering the umbilicus. 
Millem. Inches. 
Mayorrtciameternt 2 occcct sods se: 32 1.3 
Nilronore ChaasO nes obceon Be ab ed Sa tlh 26 1.05 
ASE 1 Ge Seite Spa eal eine MR dtp 0.9 
Habitat. Mahableshwar. Western Ghats of Hindustan. 
This fine species of Ariophanta has long been confounded with 
Nanina Bajadera, Pir. which is, however, although a variable 
shell, easily distinguished. N. Bajadera is more globose and thicker, 
being at the same time more transparent, it has much stronger sculp- 
ture (and deeper sutures) and is always rounded at the periphery near 
the mouth, and frequently throughout, while in N. intumescens, the 
blunt angulation is persistent. MN. Bajadeya too has a fine vitreous 
lustre, while zntwmescens is dull, and the former shell is usually of a 
greenish olive colour, though varying in this character and sometimes 
resembling the latter. The animals also shew a difference in colour, 
that of VV. atwmescens is uniformly, so far as I have seen, dark cine- 
rous, while that of Bayjadera is much lighter, but very variable. The 
latter shell is found mostly on shrubs, the former on the ground, and 
while imtwmescens has as yet only been found at Mahableshwur, 4,500 
feet above the sea, Bayadera (which is rare at Mahableshwur) abounds 
on the equally or nearly equally high hills of Singhur and Poorundhur, 
and along the summit of the Western.Ghats at about 2,000 feet. It 
abounds at Khandalla at the top of the Bhore Ghat. 
Thave already mentioned, in a previous paper, (An. Mag. Nat. Hist. 
for February, 1863) that an examination of the type specimens of 
N. Bajadera, Pir. and N. ammonia, Valenciennes, has shewed these 
two supposed species to be identical. I long doubted the distinct- 
ness of the species now described from N. Bajadera, but although 
5 
