gS YORKSHIRE NATURALISTS' UNION. 



N.W.- Mickle Fell. Birkdale Tarn Moss. 

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

 S.E. — Riccall Common. 



Var. subarcuatum (Wolle) West. [Syn. 5. subarcuatum 



WoUe 1880; 6'. denticulatum Elfv. 1881 ; S. Avicula 



var. verrucosum West 1892]. 

 N.'\\'.— Mossdale Moor, Widdale Fell. 

 N.E.— Stokesley. 



454. Staurastrum aciculiferum (West) Anders. 



[Syn. S. Avicula var. aciculiferum West]. 



Mid W. — Cocket Moss, near Giggles wick. Penyghent. 

 Whernside. 



N.W.— Mickle Fell. Lund's Fell. Mossdale Moor, Wid- 

 dale Fell. 



455. Staurastrum monticulosum Br^b. 

 N.W.— Cowgill Wold Moss, Widdale Fell. 

 N.E. — Pilmoor, near Thirsk. 



456. Staurastrum furcatum (Ehrenb.) Brdb. [Syn. 

 S. spinosum Ralfs. ; 61 De Tonii Eichl. & Gutw. ; 

 S. cornubiense Benn.]. 



N.E.— Strensall ! (W. B. Turner). Pilmoor, near Thirsk. 



457. Staurastrum furcigerum Br^b. 

 Mid W. — Bramhope (J. Abbott). 



N.E. — Gormire. Strensall (W. B, Turner). Pilmoor, near 

 Thirsk (with zygospores). 



Forma armigera Nordst. 

 [Syn. 5. armigeriMi Br6b. ; 5. pseudofnrcigerum Reinsch]. 

 N.E.— Gormire (W. B. Turner). 



458. Staurastrum oligacanthum Brdb. 

 N.W.— Mickle Fell. 



459. Staurastrum cristatum (Nag.) Arch. 



[Syn. >S. Nordstedtii Gutw '" 

 N.E.— Strensall (W. B. Turner). Pilmoor, near Thirsk. 



460. Staurastrum Reinschii Roy. 



Mid W. — Malham Tarn. Cocket Moss, near Giggleswick. 

 Ingleborough. Cam Fell. 



Trans. V.N.U., 1897 (pub. Dec. 1900). Bot. Scries, Vol. 5. 



