lOO YORKSHIRE NATURALISTS' UNION. 



466. Staurastrum Strensallense Turn. 

 N.E. — Strensall Common (W. B. Turner). 



467. Staurastrum hirsutum (Ehrenb.) Breb. 

 S.W. — Denholme. Cullingvvorth. 



Mid. W. — Adel. Bride Cross, above Farnley Moor. Bog 

 two miles south of Clapham. Ingleborough. South of Cray 

 Moss. Oughtershaw Tarn. Ribblehead. 



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

 Mossdale Moor, Widdale Fell. 



N.E.— Strensall ! (W. B. Turner). Scarborough Mere. 



468. Staurastrum paxilliferum G. S. West. 

 N.E. — Pilmoor, near Thirsk, abundant (vii. 1898). 



This species is only known elsewhere from Wicken Fen, 

 Cambridgeshire. 



469. Staurastrum muticum Br^b. 



Mid W. — Roundhay Park, Leeds, abundant (vi. 1898). Ilkley 

 (W. H. Dikes). 



N.W.— Cronkley Fell. 



N.E.— Strensall. 



S.E. — Riccall Common. 



470. Staurastrum orbiculare (Ehrenb.) Ralfs. 

 S.W. — Near Wilsden. Cullingworth. 



Mid W. — Cocket Moss, near Giggleswick. 



N.W.— Mickle Fell. 



N.E.— Gormire; Strensall! (W. B. Turner). 



S.E. — Riccall Common. 

 Var. extensum Nordst. 



S.W.— Ogden Clough. 



Mid ^V. — Arncliffe (with zygospores). Cocket Moss, near 

 Giggleswick. 



N.W. — Cautley Spout. Mickle and Cronkley Fells. Bog 

 near Widdale Beck. 



Var. depressum Roy & Biss. 



Mid W. — Malham Tarn. Bog two miles south of Clapham. 



N.E. — Pilmoor, near Thirsk. Strensall. 



S.E. — Riccall and Skipwith Commons. 



Trans. Y.N.U., 1897 (pub. Dec. igoo). Bot. Series, Vol. 5. 



