48 YORkSHiRE naturalists' UNIOtf. 



Mid W. — Above Eldwick. Baildon Moor, in profusion along 

 with Roya obtusa var. montana, among Rhacotnitrium adculart. 

 Plentiful in a ditch near Norwood Hall, above Lindley Reservoir. 

 Appletreewick, in a trough. Cocket Moss, near Giggleswick. 

 Old Cote Moor. Near Buckden. Cray Moss. 



S.E.— Market Weighton. 



1 88. Penium inconspicuum West. 

 N.E.— Pilmoor, near Thirsk. 



S.E. — Riccall Common, very abundant. 



189. Penium minutum (Ralfs) Cleve. 



[Syn. Docidium minutum Ralfs]. 

 Mid W.— Adel Bog (VV. B. Turner). 

 N.W.— Mickle Fell. 

 N.E.— Gormire (W. B. Turner). 

 S.E. — Riccall Common. 



Genus ROYA West & G. S. West, 1896. 



190. Roya obtusa (Br^b.) West & G. S. West. 



[Syn. Closterium obtusum Breb.]. 

 S.^V. — Greetland, near Halifax. CuUingworth. 

 N.E. — Strensall. 



Var. montana West & G. S. West. 

 S.W. — Ogden Clough, in profusion amongst Mougeotia 

 scalaris, on dripping rocks. 



Mid W. — Baildon Moor, abundant along with Penium cruci- 

 ferum, in washings of Rhacomitrinm aciculare. Cocket Moss, 

 near Giggleswick. Cam Fell. 



191. Roya Pseudodosterium (Roy) West & G. S. West. 



[Syn. Closterium Pseudodosterium Roy]. 

 N.E.- — Pilmoor, near Thirsk, not uncommon (vii. 1898). 

 Length 98-140 /i; breadth 2 "6-3 /*. 



This is the first record for this species in England, although 

 it is known from Scotland, N. Wales and W. Ireland. 

 Genus CLOSTERIUM Nitzsch, 1817. 



192. Closterium Dianas Ehrenb. 



S.W. — Rawcliffe Common. Askern. Bingley. CuUingworth, 



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



