126 



nued round the smaller volutions ; and is certainly 

 very different from the Bulimus radiatus of Dra- 

 parnaud. "NVe must therefore still consider this 

 shell as a very doubtful native. What w^e had 

 considered as this species in Ireland was a variety 

 of Z. i^ereger. 



We have occasionally found an extremely minute 

 shell of this Genus upon the leaves of the Water- 

 flag. It is of a semiglobular form, pale straw- 

 colour, with a flat and very obtuse spire consisting 

 of a single volution. The animal is clear white, 

 and very vivacious. Whether it is distinct, or 

 the young of some other species, we have not had 

 opportunities to ascertain. 



