484 Proceedings of the Boyal Physical Society. 



Paludina vivipara L. 



We have, through the kindness of Eev. Dr Gordon, seen 

 the original specimen recorded in his Morayshire list from 

 the mouth of the Findhorn. It is evidently a ballast-shell, 

 being bleached, much worn, and broken. 



Bythinia tentaculata (L.). 



Eare and local in Scotland. In addition to the five 

 counties from which specimens have been sent for authenti- 

 cation, Dr White mentions its having occurred at Fraser- 

 burgh, Aberdeenshire. 



Kirkcudbright. — Carlingwark Loch, Castle Douglas (W. Evans), 



Renfrew. — Paisley Canal (J. Conacher). Glasgow and Paisley Canal, with 

 var. producta (T. Scott). 



Lanark. — Coatbridge Canal, an operculum only (Hilderic Friend). 



Edinburgh. — Canal between Edinburgh and Slateford, with m. decollatum 

 (W. Evans). 



Linlithgow. — Canal at Linlithgow (W. Evans). 



Valvata piscinalis (Miill.). 



This species is sparingly distributed over the south-eastern 

 half of Scotland, within which area it should be looked for in 

 other counties than those stated below. 



Kirkcudbright.— Tarff, Free Kirk reach; Tongland (F. R. Coles). Max- 

 welltown ; Castle Douglas (W. Evans). 



Renfrew. — Glasgow and Paisley Canal (T, Scott). 



Haddington. — Gosford Ponds (W. Evans). 



Edinburgh.— Edinburgh (W. Turner). Lochend, R. S. Ed. 1859 (Greville 

 Collection in Edinburgh Museum). Lochend ; Duddingston Loch (W. Evans). 



Fife and Kinross. — Lindores Loch (T. Scott). Raith Lake (W. Evans). 

 Loch Leven ; Kirkcaldy (T. Scott). 



Stirling.— Loch Coulter (T. Scott). 



Perth N.— Near Perth (H. Coates). 



Forfar. — Dun's Ditch near Montrose (W. Duncan). 



Valvata cristata Mull. 



Eecorded from eight counties only, but will probably be 

 found to occur in others. 



