ON SCOTTISH DESMIDIE/E 241 



ON SCOTTISH DESMIDIE^E. 



By the late JOHN ROY, LL.D., and J. P. BISSET. 



[ Continued from page 178.] 



PLATE VIII. 



DOCIDIUM, Breb. (PLEUROT&NIUM, Ntig.} 



1. D. Baailum, Breb. General. 



2. D. c/aratiii/i, Kg. Not common. Sutherland, Ross, Inverness, 



Nairn, Aberdeen, Kincardine, Forfar, Perth, Kirkcudbright. 



3. D. ctu-onatittn, Breb. -- Rare. Inverness -- Brin and Loch 



Ruthven ; Aberdeen Scotston Moor, Slewdrum, near 

 Aboyne, Birsemore, Koynach Moor, and Bilbo in Cromar ; 

 Forfar Barrelvvell near Brechin, Findhaven Hills, and 

 Canlochan ; Perth Folotry in Fowlis Wester, and Craig-an- 

 Lochan ; Fife Tent's Moor. 



(3 nodulosum (Breb.), Roy (F. W. Algce of Enbridge Lake, 

 Hants, " Journ. Bot.," Nov. 1890, p. 335). General. 

 Both forms, and various intermediates, occur in a 

 large marsh south of Birsemore, near Aboyne. 



4. D. dilatatiiin (Cleve), Lund. Very rare. Ross Poolewe ; 



Forfar Glen Dole (Mr. Scott); Perth Rannoch (Dr. B. 

 White). 



5. D. Ehrenbergii, Ralfs. General. Several distinct forms appear 



to be included in this species, differing considerably in the 

 basal swellings and apical granules, while the length ranges 

 from 240 /./, to 655 p.. 



/3 grannlahun, Ralfs. Rare. Aberdeen near Springhill, 



moss by Skene Road, moraine pools near Cambus- 



o'-May. 



6. D. Farqnharsonii, Roy (F. W. Algse of Enbridge Lake, Hants, 



"Journ. Bot.," Nov. 1890, p. 335). (Our Plate IV. fig. i.) 

 -The mucous sheath in which this species is usually en- 

 veloped often appears to be regularly punctate. Rare. 

 Aberdeen near Springhill ; Kincardine Muchalls, on wet 

 rocks by the sea, where it was first observed in 1877 ; 

 Forfar Balquhadly Hill in Fern, 1878 ; Fife Tent's Moor; 

 Perth Sheriffmuir near Dunblane, Bracklin near Callander. 



7. D. hirsiitum, Bailey (?). Rare. Aberdeen Powlair, Cambus- 



o'-May, Dalbagie. 



8. D. maximum, Reinsch. Very rare. Kincardine Scolty near 



Banchory (once only). 

 12 E 



