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. S. snbaraiatiim 

 WoUe 1880; S. denticidatiivi Elfv. 1881 ; S. Avicula 

 var. verrucosum West 1892]. 

 N.W.— Mossdale Moor, Widdale Fell. 

 N.E. — Stokesley. 

 454- Staurastrum aciculiferum (West) Anders. 



[Syn. S. Avicula var. aciculifemm \Vest]. 

 Mid W. — Cocket Moss, near Giggleswick. Penygheiit. 

 Whernside. 



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

 dale Fell. 



455. Staurastrum monticulosum Breb. 

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

 N.E. — Pilmoor, near Thirsk. 



456. Staurastrum furcatum (Ehrenb.) Bre'b. [Syn. 



^. spifiosum Ralfs. ; S. De Tonii Eichl. & Gutw. ; 

 ^. cor?tubiense Benn.]. 

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



457. Staurastrum furcigerum Breb. 

 Mid W.— Bramhope (J. Abbott). 



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

 Thirsk (with zygospores). 



Forma armigera Nordst. 

 [Syn. S. armigeriun Brdb. ; S. pseudoftircigerum Reinsch]. 

 N.E. — Gormire (W. B. Turner). 



458. Staurastrum oligacanthum Breb. 

 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. Y.N.U., 1897 (pub. Dec. 1900). BoL. Scries, Vol. 5. 



