CAMPTONTX. 467 



corrugated, and surrounded on all sides by a thick greyish hyaline 

 mantle, which completely hides the sole during aestivation, exuding 

 a gluten, most tenacious when dried. 



" Mr. Theobald was doubtless justified, by the situation in which 

 he found his specimens, on a high peak, where the drought at the 

 time of his visit had driven the largest example of a gigantic 

 Succinea into inaccessible crevices in the rock, in attributing 

 terrestrial habits to the animal." 



Mr. S. P. Woodward writes (I.e. p. 338): "The respiratory 

 orifice is quite on the edge of the mantle. The tentacles are 

 rather conical than angular, and the mouth appears to me rather 

 peculiar, unlike Physa and Lymncea. The upper mandible is con- 

 spicuous, slightly lobed, but destitute of the ridges seen in the 

 HELICID^: and of the lateral elements which are added in Lymncea. 

 The lingual ribbon is '036 long and '014 wide with 86 rows of 



teeth, 87 in a row ~ ; they have simple obtuse hooks, as in 



Ancylus , the central row only differs in being symmetrical; the 

 laterals diminish gradually from the 14th to the 43rd, and a 

 second (outer) cusp makes its appearance, and increases until the 

 three near the margin are regularly bicuspid. The tongue is more 

 like Ancylus than any other, but differs from it in the absence of 

 those unarmed marginal plates which give a peculiar appearance 

 to the lingual ribbon of Ancylus and are still more conspicuous in 

 Velletia." 



The British Museum contains five specimens, labelled "Kat- 

 tiwar," the largest of which measures : long. 6'5, alt. 2-5 mm., 

 apert. 5'5 x 4*25 mm. The shell figured in Conch. Ind. is also in 

 the British Museum, having been presented, together with two 

 others, by Mr. Harvey. 



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