W. WEST AND G. S. WEST : ALGA-FLORA OF YORKSHIRE. 83 



Mid W. — Markington, with zygospores ! (Rev. J. S. Tute). 

 Adel Bog. Roundhay ! (W. B. Turner). Baildon. Kildwick. 

 Rombald's Moor. Otley. Ilkley. Staveley Dam, near Knares- 

 borough. Cocket Moss, near Giggleswick. Near Buckden. 

 Penyghent. 



N.W. — Sedbergh. Mickle Fell. Great Shunnor Fell. Lund's 

 Fell. Bog near Widdale Beck. 



N.E.— Thirkleby Park; Strensall ! (W. B. Turner). Pilmoor, 

 near Thirsk (with zygospores). Terrington. Stokesley. 



S.E. — Riccall and Skipwith Commons. Newsholme. Loft- 

 some Bridge, near Wressle. Hornsea Mere. 

 Var. mediolaeve West, 1892. 



[Syn. C. subochthodes Schmidle, 1895, pro parte]. 



Mid W. — Near Ligleton. 



N.E. — Strensall Common. 

 372. Cosmarium ochthodes Nordst. 



[Syn. C. ochthodes var. obtusatum Gutw.]. 



S.W. — Rawcliffe Common. Crimsworth Dean. Cullingworth. 



Mid W. — Baildon. Wigton Moor. Holden Ghyll, near 

 Keighley. Malham Tarn and Bog. Cocket Moss, near Giggles- 

 wick. Ingleton. Moughton Fell. Penyghent. Ribblehead. 

 Oughtershaw Moss. 



N.W. — Sedbergh and Cautley Spout. Mickle and Cronkley 

 Fells. Great Shunnor Fell. Cotterdale. Lund's Fell (with 

 zygospores). 



N.E. — Pilmoor, near Thirsk. Terrington. Stokesley. Scar- 

 borough Mere. 



This species is widely distributed in upland districts and is 

 not uncommon in the lowlands. The granules are broad, flat- 

 tened elevations with a somewhat irregularly-circular outline ; 

 they vary considerably in the extent of their development, in 

 some being very prominent, causing the cell-margin to appear 

 distinctly crenate, whereas in others they are much more flat- 

 tened, the cell-margin only appearing slightly undulate. 



