148 BRITISH DESMIDIACE^:. 



holme, W. Yorks ! Mickle and Cronkley Fells, N. Yorks ! 

 Warwicks (Wills). Gloucester (Ealfs}. Esher West End 

 Common, Surrey ! Sussex (Ealfs}. Dartmoor, Devon 

 (Hams). Cornwall (Marquand). 



WALES. Snowdon, Llyn Padarn, and Y Foel Fras, 

 Carnarvonshire ! Dolgelly, Merioneth (Ralfs). 



SCOTLAND. Sutherland, Aberdeen. Kincardine, Forfar, 

 and Perth ! (Roy & Biss.). Near House of Hill, Wigtown ! 



IRELAND. --Lough Anure, Donegal ! Mayo and Clare- 

 Isle ! Lough Guitane, Kerry ! Adrigole, Cork ! 



Geogr. Distribution. --Fiance. Germany. Galicia in 

 Austria. Portugal. Norway. Sweden. Poland (var.). 



Cj *J 



N. Russia. Faeroes. Spitzbergen. Greenland. 

 Var. productum West. (PL CL, fig. 15.) 



? St. tuberciththim Benn. Alg. Engl. Lake Distr. 1886, p. 12, t, 2, f. 24. 



St. ctcuhatum var. ornatitm f. simplex Boldt, Desm. Gron. 1888, p. 38 ? 

 t, 2, f. 49. 



St. sexcostaturn subsp. production West, Alg. Engl. Lake Distr. 1892, p. 21,. 

 f. 34 ; Alg. S. England, 1897, p. 496 ; 8chmidle, Alg. Geb. Oberrheins, 

 1893, p. 552 ; Bohlin, Flor. Algol, d'eau douce d'A^-ores, 1901, p. 62, 

 t. 1, f. 24 ; West & G. S. West, Alga-fl. Yorks. 1902, p. 108 ; Borge, 

 Botan. Notiser, 1913, p. 51. 



Cells relatively broader than in the type, about as long 

 as broad, including the processes ; processes short and 

 truncate (longer, however, than in the type), with a 

 circle of about 6 acute granules at their tip ; base of 

 semicell with a circle of acute granules ; vertical view 

 6-radiate, arrangement of granules essentially similar to 

 that of the type, but cell- wall very much more verrucose, 

 granules tending to become scattered. 



Length 40-43 (JL ; breadth 43 [i ; breadth of isthmus. 

 16-17 [L. 



ENGLAND. Borrowdale, Cumberland ! Bowness, 

 Brother's Water and Helvellyn (at 2400 feet), Westmore- 

 land ! Cocket Moss near Giggleswick, and bog 2 miles 

 south of Clapham, W. Yorks ! Cronkley Fell ; bog near 

 Widdale Beck, and Pilmoor, N. Yorks ! Bog near Long- 

 moor Pool, Sutton Park, Warwickshire ! New Forest,, 

 Hants ! Near the Lizard, Cornwall ! 



WALES. Moel Siabod, Carnarvonshire ! 



