50 YORKSHIRE NATURALISTS' UNION. 



Mid W.— Adel Bog. Ilkley. Malham Tarn Bog. Cocket 

 Moss, near Giggleswick. 

 N.W.— Mickle Fell. 



N.E. — Pilmoor, near Thirsk. Terrington. 

 S.E. — Riccall Common. 



Var. robustum G. S. West. 

 N.E. — Pilmoor, near Thirsk. 



197. Closterium incurvum Breb. 



N.E. — Pilmoor, near Thirsk (vii. 1898). Breadth 11 /t; apices 

 52 /i apart. 



198. Closterium Venus Kiitz. 



S.VV. — Rawcliffe Common. Frizinghall. Cullingworth. 

 Mid W.— Alwoodley (W. B. Turner). Eldwick. Wigton 

 Moor. Cocket Moss, near Giggleswick. 

 N.W.— Mickle Fell. 



N.E. — Strensall. Pilmoor, near Thirsk. Scarborough Mere. 

 S.E. — Riccall and Skipwith Commons. 



199. Closterium eboracense Turner. 



[Syn. C. Cucumis Wolle non Ehrenb.]. 

 S.W. — Campsall, Doncaster (W. B. Turner). 

 Mid W.— Chapel-Allerton (W. B. Turner). 

 N.W. — Mickle Fell [recorded as C. Cucumis]. 



200. Closterium Leibleinii Kiitz. 



S.W. — Rawcliffe Common. Askern. Near Mirfield. Fixby. 

 Frizinghall. Keighley. 



Mid W. — Baildon. Wigton Moor. Boston Spa. Arthington. 

 Adel. Ilkley. Bolton Woods. Harrogate. Ribblehead. 



N.W.— Mickle Fell. 



N.E. — Strensall ! (W. B. Turner). Scarborough Mere. River 

 Derwent, Forge Valley. Saltbum. 



S.E. — Market Weighton. Hornsea Mere. Beverley; News- 

 holme. Routh. 



201. Closterium moniliferum (Bory) Ehrenb. 

 An abundant and widely-distributed species. 



Trans. Y.N. U., 1896 (pub. Sepi. 1900). Bot. Series, Vol 5. 



