6o6 Records of the Indian Museitm. [Vol. VIII, 



columellar margin slightly reflected. Major diameter lO'o, alt. 

 axis 35 mm. 



Original description: " T. umbilicata, orbiculato-convexius- 

 cula, sub-diaphana, pallide cornea, epidermide scabra induta, aufr. 

 6, convexiuscula, ultimus angulatus, antice vix descendeus ; umbi- 

 licus latiusculus,perspectivus; apertura obliqua, lunato-rotundata. 

 perist simplex marginibus." 



Among some shells collected alive by my brother-in-law Major 

 S. W. Robinson, R.A., were a few immature examples of this species. 

 The animal has the visceral sac white, with a green tinge, crossed 

 and splashed distantly with black and a few intervening spots of 

 same colour towards the apex. From one I have been able to 

 extract the jaw and radula, but not in so perfect a state as I 

 could wish, still the number of the central and admedian teeth on 

 broad plates can be counted and comparison made with species 

 from other and distant localities, this character shows far more 

 decided and more reliable variation than is to be found in the 

 shells. The radula (text-fig. 3) of H. huttoni is a very beautiful 



i^ii% ^^i^ /^^7,^^9f^.^'^ 



389^68 ikMMs^: 



Fig. 3. — Landoiii-ia huttoni (^Pir.) 



A. — Jaw, X 30. 



B. — Teeth of the radula, from the central to the nth. 



C. — ,, the outermost marginals, much enlarged. 



one. The first four admedian teeth are short and broad, have 

 no cusp on the outer side, only a sort of flange or shoulder, with 

 the 5th tooth the mesocone becomes longer and narrower and 

 an ectocone is present which continues to the nth tooth, the 

 plates still being broad, these then begin to get narrower with the 

 ectocone bicuspid, and at about the 14th tooth the mesocone 

 becomes bicuspid also. 



The jaw (text-fig, 3, A) was slightly broken on one side, but 

 some 15 or 16 narrow plates could be counted. 



Since Hutton and Benson dealt with Helix huttoni some 80 

 years ago, coming down to more recent times it has been placed in 

 Fruticola by Theobald 1876, in Plectotropis by Nevill 1878, Pils- 

 bry 1895, Gude 1914. 



In "Die Preussische Expedition nach Ost-Asien", p. 267. 

 Von Martens records H. orbicula, Hutton, from Zollinger in Java, 

 this I expect will prove to be another species, the shell no doubt is 

 very close in form, but if the animal could be seen it is not likely 

 to be the same as the Landour species. 



