W. WESt AND 07. S. West : AL6A-tL6RA OP YORfcSttlRE. 4s 



N.E.— Strensall ! ; Gormire (W. B. Turner). Pilmoor, near 

 Thirsk. Terrington. Carlton Bank. Stokesley. 

 S.E. — Riccall Common. 



173. Penium interruptum Brdb. 

 N.W.— Mickle Fell. Great Shunnor Fell. 

 N.E.— Pilmoor, near Thirsk. 



174. Penium Libellula (Focke) Nordst., 1888. [Syn. 



Closteriutn Libellula YocHne, \%/^i\ Penium dosterioides 



Ralfs, 1848]. 

 S.W.— Cullingworth. 



Mid W.— Ilkley (W. H. Dikes). VVhernside (iii. 1893). 

 N.W.— Mickle and Cronkley Fells. Reeth. 

 N.E. — Seamer. 



175. Penium Navicula Breb. 

 S.W. — Thornton Moor. Keighley Moor. 



Mid W. — Baildon Moor. Cocket Moss, near Giggleswick. 

 Bog two miles south of Clapham. Old Cote Moor, and near 

 Buckden. 



N.W.— Mickle Fell. 



N.E. — Pilmoor, near Thirsk (with zygospores, vii. 1898). 

 Carlton Bank. Stokesley. 



S.E. — Riccall Common. 



176. Penium oblongum DeBary. 



S.W. — Greetland, near Halifax. Ogden Clough. Keighley 

 Moor. 



Mid W.— Add (W. B. Turner). Above Eldwick. Ilkley. 

 Ingleborough. Cray Tarn, 2,000 ft. Cam Fell. Ribblehead. 

 Whernside. 



N.W. — Mickle Fell. Great Sleddale. Mossdale Moor, 

 Widdale Fell. 



N.E.— Carlton Bank. 



177. Penium spinospermum Joshua. 



Mid W. — Cowgill Wold Moss, Widdale Fell (with zygospores). 

 Diam. zygosp. with processes 29-33 F- 



