50 yoRKSHiRK naturalists' union. 



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



Moss, near Giggleswick. 

 N.W.— Mickle Fell. 



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

 S.E. — Riccall Common. 



Var. robustum G. S. West. 



N.E. — Pilmoor, near Thirsk. 



197. Closterium incurvum Brcb. 



N.E.^Pilmoor, near Thirsk (vii. 1898). Breadth 1 1 /a; apices 

 52 /A apart. 



198. Closterium Venus Kiitz. 



S.W. — Rawcliffe Common. Frizinghall. CuUingworth. 

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

 Moor. Cocket Moss, near Giggleswick. 

 N.W.— Mickle Fell 



r J 



N.E. — Stren.sall, Pilmoor, near Thirsk. Scarborough Mere. 

 S.E. — Riccall and Skipwith Commons. 



199. Closterium eboracense Turner. 



[Syn. C. C2icumis WoUe non Ehrenb.]. 

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

 Mid W.— ChapehAllerton (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. 



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



Adel. Ilkley. Bolton Woods. Harrogate. Ribblehead. 



]Sr.W.-—Mickle Fell. 



J- 



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

 Derwent, Forge Valley. Saltburn. 



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

 holme. Routh. 



201. Closterium moniliferum (Bory) Ehrenb. 



An abundant and widely-distributed species. 



i 



^% 



Trans. Y.N.U., i8g6(pub. Sept. kjoo). Bot. Series, Vol 5. 



