486 Proceedings of the Royal Physical Society. 



its range as far north as Sutherlandshire and Eenfrewsliire 

 on the two sides of Scotland. 



Kirkcudbright. — Black Stockton ; Free Kirk reach, Tarff ; Tongland ; 

 Dee (F. K,. Coles). Castle Douglas ; Maxwelltown (W. Evans). 



Renfrew. — Paisley Canal (T. Scott), 



Selkirk. — Haining Lake near Selkirk (W. Evans). 



Berwick. — Coldingham Loch (W. Evans). 



Haddington. — Presmennan Lake near East Linton (W. Turner). North 

 Berwick (W. Evans). 



Edinburgh. — Davidson's Mains (AV. Evans). 



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

 Loch Leven (T. Scott). 



Stirling. — Loch Coulter (T. Scott). 



Perth N. — Butterston Loch near Dunkeld (AV. Evans). 



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



Clyde Isles.— Loch Fad (T. Scott). 



Sutherland E.— Brora (W, Baillie). 



Planorbis parvus Say. 



This scarce British species — very local anywhere in Britain 

 — has been authenticated from six Scottish counties, one 

 of them the most northerly on the mainland. Dr Jeffreys 

 speaks of it as occurring on Unst. 



Berwick. — Coldingham Loch (W. Evans). 



Haddington. — Presmennan Lake near East Linton (W. Turner). 



Edinburgh. — Duddingston Loch (W. Evans). 



Forfar. — Loch Eescobie (W. Duncan). 



Elgin. — Near Elgin (G. Gordon). 



Sutherland W. — Locl:\,near Stair Lighthouse (W. Baillie). 



Planorbis spirorbis Miill. 



This species is — as Dr "White says — widely diffused, its 

 authenticated records carrying its range to the northern verge 

 of the Scottish mainland. 



Kirkcudbright.— St Mary's Isle (F. E, Coles). 



Renfrew. — Crosslee near Paisley ; near Port Glasgow (T. Scott). 



Haddington. — Bleachfield, Dunbar (T. Scott). Dunbar (W. Evans). 



Edinburgh. — Marsh on Braid Hills (W. Evans). 



Stirling. — Coltenhave Dam (T. Scott). 



Perth N.— Near Perth (H. Coates). 



Forfar. — Near Montrose (W. Duncan). 



