150 YORKSHIRE NATURALISTS' UNION. 



Mm W.— Above Eldwick. Cam Fell. 

 N.W.— Mickle Fell. Muker. 



From above Eldwick there was a rather more slender form 

 (thickness, trichome i"3 — 2 /a) with markedly uncinate apices. 



742. Oscillatoria splendida Grev., 1824. 



[Syn. Oscillaria leptotricha Kiitz., 1845.] 

 S.W.— Bradford. Calverley. 

 Mid W— Adel Bog. 



N.W. — Near Moorcock Inn. Mickle Fell. 

 N.E.— Stokesley. 



Var. attenuata West & G. S. West, 1896. Thickness, 

 trichome 2 — 2 '3 \i. 

 The apices of this variety are much more elongated and 

 attenuate (up to 30 /x) than the apices of the typical form, though 

 like those they are subcapitate. 



Mid W. — In ditches, Baildon Moor (vii. 1895). 



743. Oscillatoria Okeni Ag., 1827. 

 S.W. — Tiough at Heaton. 



This species has not previously been recorded for the British 

 Isles. 



744. Oscillatoria chalybea Mertens, 1822. 

 S.W.— Near Keighley. 



N.E. — York ! (F. Bewlay). Terrington. 



745. Oscillatoria formosa Bory, 1827. 

 N.W.— Little Ing Gill, Dodd Fell. 



N.E. — Scarborough. 



746. Oscillatoria simplicissima Gomont, 1893. 

 S.W.— Marley. 



Mid W. — Cocket Moss, near Giggleswick (iv. 1898). 

 747- Oscillatoria anguina Bory, 1827. 



Mid W. — Cocket Moss, near Giggleswick (iv. 1898). Ingle- 

 ton, amongst mosses. 



This species has not previously been recorded for the British 

 Isles 



Trans. Y.N.U., 1899 (pub. July 1901). Bot. Series, Vol. 5. 



