W. WEST AND G. S. WEST : ALGA-FLORA OF YORKSHIRE. 43 



Genus CYLINDROCYSTIS Menegh., 1838. 



166. Cylindrocystis Brebissonii Menegh. 



[Syn. Penium Brebissonii (Menegh.) Ralfs]. 



A general and widely distributed species, especially on heaths 

 and in rhoorland districts. 



S.W. — Goole Moor (H. F. Parsons). Thornton Moor. Ogden 

 Clough. Denholme. CulUngworth. Near Keighley. 



Mid W.— Moor Allerton (W. B. Turner). Adel Bog. Bride 

 Cross, above Farnley Moor. Leathley. Near Norwood Hall, 

 above Lindley Reservoir. Ilkley i^\ H. Dikes). Boston Spa. 

 ^Vigton Moor. Earl's Seat. Malham Tarn Bog. Cocket Moss, 

 near Giggleswick. Ingleton. Ingleborough. Black Hill, near 

 Settle. Penyghent. Cray Moss. Oughtershaw Tarn. Cam Fell. 

 Ribblehead (with zygospores in abundance). Whernside, at 

 2,000 ft. 



N.W.— Baugh Fell. Sedbergh. Mickle and Cronkley Fells 

 (with zygospores). Great Shunnor Fell; a pure gathering 

 obtained at over 2,200 ft. Penhill Beacon. Mossdale Moor, 

 Widdale Fell. Bog near Widdale Beck. Lund's Fell, up to 

 2,000 ft. Dodd Fell, at 2,000 ft. Snaizeholme Fell. 



N.E. — Strensall Common (with zygospores). Pilmoor, near 

 Thirsk. Terrington. Carlton Bank. Peat deposit, Filey. Near 

 Scarborough. 



S.E. — Riccall Common. Skipwith Common. 



167. Cylindrocystis crassa DeBary. 

 S.W. — Ogden Clough. Near Keighley. 



Mid W. — Adel Bog. Blubberhouses (W. B. Turner). Simon 

 Seat. Ilkley. Cocket Moss, near Giggleswick. Ingleborough. 

 Moughton Fell. Penyghent and Linn Ghyll. Old Cote Moor. 

 Near Buckden. Cam Fell (pure gathering). Whernside, at 

 2,000 ft. 



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

 Fells. Great Shunnor Fell. Lund's Fell. Mossdale Moor, 

 Widdale Fell. Hunter's Hole, Craydale Moor (1,900 ft.). 



