ON SCOTTISH DESMIDIE/E 179 



1 8. S. bicorne, Hauptfl. Extremely rare. Aberdeen north and 



west margins of Birsemore Loch. 



19. S. Indentation, Wittr. (S. longispinum, Lundell, not of Bailey). 



-Very rare. Argyle Glen Coe (1878). 



20. S. Bieneanum, Rabenh. Rare. Caithness Loch Hempriggs ; 



Kincardine Kerloch and Blackball ; Forfar Balquhadly in 

 Fern. 



Forma Spetsbergense, Wille. - - Very rare. Aberdeen 

 Lochnagar near the summit. 



21. S. bifidum (Ehr.), Breb. Extremely rare. Ross at Poolewe 



(July 1889, Rev. D. Campbell). 



2 2. S. botrophiluin, Wolle. Extremely rare. Inverness on Cairn- 

 gorm, at 3500 feet (Mr. A. I. M'Connochie). 



23. S. brachiatum (Ehr.), Breb. Not uncommon. Ross, Inverness, 



Aberdeen, Kincardine, Forfar, Perth, Argyle, Arran. 



With zygospores, in Kincardine at Curran and Cloch- 

 naben. 



24. S. brachycerum (Ehr.), Breb. Not common. Aberdeen, Kin- 



cardine, Forfar, Perth. 



25. ,5. Braunii, Reinsch. Very rare. Aberdeen near Aboyne on 



the " Old Road." 



26. S. Brebissonii, Archer. Not common. Ross, Aberdeen, and 



Kincardine, common ; Forfar Barrelwell near Brechin ; 

 Perth Hill of Alyth, Loch Lundie, and Birnam Hill ; Fife 

 Tents Moor. 



27. 6". brevispinum, Breb. Not common. Sutherland, Inverness, 



Aberdeen, Kincardine, Forfar, Perth. 



28. S. Cerastes, Lundell. Extremely rare. Aberdeen near Loch 



Dawan. 



29. S. clepsydra, Nordst. Extremely rare. Aberdeen at Achnerran, 



in Logie-Coldstone. 



30. S. Clevei (St. lave, Ralfs ; f3 Clerei, Wittr.) Very rare. Inver- 



ness at Brin, and in Skye near Loch Coruisk ; Argyle Glen 

 Coe. 



31. 6". coarctatum, Breb. Very rare. Kincardine at Cammie in 



Strachan. 



32. 6! connatuin (St. dejectuin, j connatum, Lund.) General. 



33. S. controversum, Breb. General. 



34. S. cordatiun, Gay. Very rare. Inverness near Brin (Mrs. 



Farquharson). 



35. S. corniculatuin, Lundell. Very rare. Aberdeen Bottomend 



and Heughhead, Aboyne. 



