18GG.] 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 4J, 

 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. 



Major diameter, 32 1.3 



Minor ditto, 26 1.05 



Axis, 22 0.9 



Habitat. Mahableshwar. Western Gbats of Hindustan. 



This fine species of Ariophanta has long been confounded with 

 Nanina Bajadera, Pfr. 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. N. Bajadera too has a fine vitreous 

 lustre, while intumescens 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 N. intumescens is uniformly, so far as I have seen, dark cine- 

 rous, while that of Bajadera is much lighter, but very variable. The 

 latter shell is found mostly on shrubs, the former on the ground, and 

 while intumescens has as yet only been found at Mahableshwur, 4,500 

 feet above the sea, Bajadera (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. 



I have already mentioned, in a previous paper, (An. Mag. Nat. Hist. 

 for February, 1863) that an examination of the type specimens of 

 N. Bajadera, Pfr. 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 



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