I92I.J 



Maiiipur Molluscs. 



563 



Paludomus pustulosa, sp. nov. 



The shell when fully adult is thick and porcellaneous and 

 of a uniform blackish colour externally. Only the body-whorl 

 and part of the penultimate whorl usually remain. The former 

 is tumid, very oblique and more than twice as deep at its inner 

 than at its outer margin as seen from the dorsal surface. The 

 inner margin is very broadly rounded. On the ventral surface 

 the whorl has an elongate, irregularly oval outline. On the outer 

 side it is highly convex abo\-e but recedes rather abruptly to- 



Fi(.. II. — Shells <it Paludomus l^ II it til osa. 

 X. Adult shell. B. Halt-iriown shel 



wards the lower margin. On the inner side the region above the 

 aperture is short and convex. The ventral surface is swollen 

 above, somewhat flattened below. The mouth projects obliquely 

 at its upper end. It is slighth pyriform, rather narrow and 

 oblique. The upper extremity is sharply pointed, the lower 

 evenly and not very broadly rounded. The lip is thin, slightly 

 everted and obscurely pleated internally. It forms a well-defined 

 margin to the aperture and is highly polished and of a bluish 

 white colour with a narrow black border. The columellar margin 

 is similar in appearance and forms a continuous ridge with the 



