Zoological Society. 69 



Os anticum inter tentacula inferiora hians; labia radiato-plicata. 

 Tentacula saperiora elongata, punctum percipiens tumore oblongo 

 situm gerentia. Penis prsegrandis ; antrum cervicis elongatum la- 

 tere dextro et prope tentacula situm. Solea complanata pedis latera 

 a^quans. Cauda tentaculata ; tentaculum subretractile, glandula ad 

 basin posita humorem viscidum (animale attrectato) exsudante. 



Mr. Benson describes particularly the habits of the species ob- 

 served by him, which he first discovered living at Banda in Bundel- 

 kund on the prone surface of a rock. The animal carries the shell 

 horizontally or nearly so ; is quick in its motions ; and, like Heli- 

 colimax, it crawls the faster when disturbed, instead of retracting its 

 tentacula like the Snails in general. In damp weather it is rarely re- 

 tracted within its shell, the foot being so much swelled by the ab- 

 sorption of moisture that if it is suddenly thrown into boiling water 

 the attempt to withdraw into the shell invariably causes a fracture 

 of the aj)erture. In dry weather the foot is retracted, and the aper- 

 ture is then covered by a whitish false operculum similar to that of 

 other Helicidce. The two elongated processes of the mantle are con- 

 tinually in motion, and exude a liquor which lubricates the shell, 

 supplying, apparently, that fine gloss which is observable in all re- 

 cent specimens. The fluid poured out from the orifice at the base 

 of the caudal horn-like appendage is of a greenish colour ; it exudes 

 when the animal is irritated, and at such times the caudal appen- 

 dage is directed towards the exciting object in such a manner as to 

 give to the animal a threatening aspect. 



Of several specimens brought to England by Mr. Benson in 1832, 

 one survived from December 1 83 1 , when it was captured in India, 

 until the summer of 1833. 



Another Shell particularly noticed by Mr. Benson is the type of 

 a new genus, allied to Cyclostoma, which he has described under 

 the name of Pterocyclos in the first No. of the * Journal of the Asi- 

 atic Society of Calcutta.' 



Specimens of a species of Assiminia, Leach, were preserved alive in a 

 glass, replenished occasionally with fresh or salt water, until after 

 the vessel in which Mr. Benson returned to England had passed St. 

 Helena. 



A Snail obtained near Sicrigali and the river Jellinghy, one of 

 the mouths of the Ganges, is characterized by Mr. Benson as Heux 

 interrupta. 



In the character of the excrement being voided from an opening 

 in the terminal and posterior part of the foot instead of from the 

 foramen commune, the animal of Hel. interrupta differs most ma- 

 terially from the other Helices. The angulated periphery of the shell 

 shows an approach to Carocolla, but Mr. Benson is not aware that 

 the animal of this genus diflTers from that of Helix. From Hel. Hima- 

 layana. Lea, the Hel. interrupta is distinguished by its peculiar 

 sculpture ; its spire is also more exserted. 



The collection also contained specimens of an Arcaceous Shell 

 found in the bed of the Jumna at Humeerpore in Bundelkund. 

 Mr. Benson proposes for it the generic appellation Scaphula. 



