36 YORKSHIRE naturalists' UNION. 



N.W.— Cronkley Fell. 



N.E. — Pilmoor, near Thirsk. 



130. Spirogyra Weberi Kiitz. 



S.W.— Hainworth (T. Hebden). Cullingworth. Keighley. 

 Mid W. — Boston Spa. 

 N.W.— River Ure. 



131. Spirogyra Grevilleana (Hass.) Kiitz. 

 S.W.-Dewsbury (C. B. Crawshaw). Keighley. 



132. Spirogyra Hassallii (Jenner) Petit. 

 S.E. — Newsholme, near Howden. 



133. Spirogyra insignis (Hass.) Kiitz. 

 S.W. — Near Mirfield. Near Bradford. Wilsden. 

 N.W.— Near Sedbergh. 



134. Spirogyra gracilis (Hass.) Kiitz. [Sy n. S.^arvsee/zs 



(Hass.) Kiitz., forma graa'/ts (Hass.) Cooke, and 

 ioxma. parva (Hass.) Cooke; Zygnema graci.'e Hass. ; 

 Z. parva Hass.]. 

 S.W. — In dam at Kexborough (C. B. Crawshaw and C. P. 

 Hobkirk). 



Mid W.— Ilkley. 

 N.W.— Lund's Fell. 



Var. flavescens (Hass.) Rabenh. [Syn. S. flavescens 

 (Hass.) Kiitz. ; Zygnema flavescens Hass.]. 

 S. W.— Soothill, Dewsbury (C. B. Crawshaw). Holmfirth (C. P. 

 Hobkirk). Cullingworth. 



Mid W.— Roundhay (W. B. Turner). Baildon. Rombald's 

 Moor. Austwick. Grassington. 

 N.W.— Cronkley Fell. 

 N.E. — Strensall. Scarborough Mere. 



135. Spirogyra communis (Hass.) Kutz. S^yw. Zygnema 

 comtnune Hass. ; Spirogyra longata (Vauch.) Wittr., 

 1872]. 



S.W.— Fixby. Bradford. 



Mid W.— Adel Bog (W. B. Turner). Malham. 



Trans. Y.N.U., 1896 (pub. Sept. 1900). Bot. Series, Vol. s. 



