W. WEST AND G. S. WEST : ALGA-FLORA OF YORKSHIRE. 1 99 



S.W. — Fixby. Marley, near Bingley. 



N.W. — Jervaulx Abbey. 



N.E. — Scarborough Mere. Strensall. Terrington. Malton. 



S. E. — Market Weighton. 



960. Synedra radians (Kiitz.) Grun. 



S.W.— Askern, Cuswortb, and Hatfield districts (M. H. Stiles). 

 Doncaster. Ogden Clough. 



Mid W. — Rombald's Moor. Near Buckden. 

 S.E. — Market Weighton. Skipwith Common. 



961. Synedra capitata Ehrenb. 



S.W. — Askern and Hatfield districts (M. H. Stiles). Hunslet 

 (J. Abbott). Goole; Roche Abbey (E. Hunter). Near Shipley. 



Mid AV.— South Milford (W. B. Turner). Malham Cove 

 (J. M. Kirk). Staveley Dam, near Knaresborough. 



N.E. — Strensall. Near Scarborough. 



S.E. — Beverley. Spring Ditch; Risby Pond; Reservoir 

 Waterworks, Hull; Hornsea Peat Deposit (G. Norman). 



962. Synedra famelica Kiitz. 



Mid W. — Harrogate. Hawkswoith Springs, Bog two miles 

 south of Clapham. Malham Tarn. 



N.W. — Cautley Spout. Snaizeholme Beck. 



963. Synedra affinis Kiitz. var. fasciculata (Kiitz.) V.H. 



[Syn. S. fasciculata Kiitz.]. 

 Mid W.— Outlet to lake, Ripley (G. Norman). 

 \S. hamata W. Sm., recorded for the outlet of the lake, Ripley 

 Castle, is probably a variety of S. affinis Kiitz.]. 



964. Synedra amphicephala Kiitz. 



Mid W. — Ingleton, on wet rocks, amongst Cladophora 

 ghvne?'ata. 



Genus ASTERIONELLA Hass., 1850. 



965. Asterionella formosa Hass. 



S.W. — Askern district (M. H. Stiles). Greetland, near 

 Halifax. 



Mid W, — Ripley Castle (G. Norman). Cowthorpe. Peny- 



