AEIOPHANTA. 45 



This variety has been recorded from Bentofca (Nevill) and Cotta, 

 near Columbo (Gollett), both at the sea-level. 



[The animal of a specimen from Cotta, Ceylon, is externally 

 like that of A. ligulata, and, as in that species, there is not the 

 slightest sign of a right shell-lobe. The left dorsal lobe is con- 

 tinuous, but a slight slit with overlap occurs on it at 16 mm. 

 from the respiratory orifice ; this may also be observed in A. chenui. 

 This lobe is very narrow for its whole length. The genitalia are 

 typical of the genus Arioplianta. " Penis with a long retractor 

 caecum, a small sessile spermatheca ; the amatorial organ long, 

 bent on itself, with a large blunt point. 



The teeth of the radula are similar to those of A. chenui : 

 55 . 1 . 27 . 1 . 27 . ] . 55 

 83 . 1 . 83] 



74. Arioplianta maderaspatana, Gray (Helix), P. Z. S. 1834, p. 67 ; 



Pfr. (Helix) Mm. Hel i, 1847, p. 63 ; id. t. c. iv, 1859, p. 54 ; 

 id. t. c. vii, 1876, p. 118 ; H. $ T. (Helix) C. I. 1876, pi. 28, fig. 2. 



Shell openly perforate, depressedly globose, thin, rugosely 

 striated, dull brownish rufous above, passing into white on the 

 inner side of each whorl, paler or whitish beneath, generally with 

 a white or whitish band round the periphery, occasionally whitish 



Fig. 25. Ariophanta maderaspatana. 



horny throughout, sometimes dark rufous speckled with white ; 

 spire depressedly convex ; whorls 5|, convex, the last rather more 

 swollen, not subangulate at the periphery in adults ; aperture 

 oblique, roundly lunate ; peristome simple, thin, very slightly 

 expanded, the reflected portion increasing in breadth near the 

 perforation. 



Major diam. 32, min. 26, axis 19 mm. 



Hob. The higher parts of Mysore, the Nilgiris, Kolamalais, 

 Shevroys, and locally at lower elevations, as on Chittycolum Hill, 

 north of Trichinopoly, at about 1500 feet above the sea. 



An almost uniformly coloured isabelline variety, with more 

 convex whorls and impressed suture, occurs above 6000 feet on 

 the Nilgiri and Palni Hills, and has in the first-named locality a 

 black mantle and the body light tawny. This is var. /3 of Pfeiffer. 

 The common form has both animal and mantle grey. 



[Specimens from the Palni Hills have the mantle of the same 

 colour as the rest of the body. The right dorsal lobe is triangular 

 in shape, the left broad and continuous from the respiratory orifice 

 up to the umbilical region as in A. solata and tranquebarica. 



