6 NERITID^. 



it is truly living in the Loch of Stennis in Orkney, often 

 in water more or less brackish, and under circumstances 

 similar to those under which it occurs in the Baltic. 

 The question of the parentage of the Orkney specimens is 

 a curious subject for zoological speculation. In Ireland 

 it occurs on both east, west, and south, in the Liffey, 

 Shannon, and Lee (W. Thompson). 



It is generally distributed through central and parts 

 of northern and southern Europe.* 



* The JV. virt/inea of the Conchological Dictionary (p. 127), said to have been 

 found at Seafield, in the west of Ireland, is a foreign sliell, and judging from the 

 stated size, " hardly the eighth of an inch," and the black sutural line mentioned 

 in the description, was rather the Mertoniana of Sowerby's Monograph of this 

 geuus, than his vir(jinea. The specimens have been lost. 



