28 YORKSHIRE NATURALISTS UNION. 



N.W.— Birkdale Tarn Moss. 



N.E.— Terrington. Saltburn. Gormire (W. B. Turner). 

 Pilmoor, near Thirsk. 



S.E. — Near Meaux Abbey. Waghen. Routh. Newsholme. 

 Riccal and Skipwith Commons. 



Var. bicuspidatum Borge. 



N.E. — Pilmoor, near Thirsk. 



The forms seen agreed with those mentioned by Lemmerman 

 (Forschungsberichte Biol. Stat. Plon, 1896, p. 163, c. fig.) as 

 / longispina. This variety has not previously been recorded 

 for the British Isles. 



95. Ophiocjrtium majus Nag. 



Mid W. — Bramhope (J. Abbott). Eldwick. Staveley Dam, 

 near Knaresborough. 



N.E. — Pilmoor, near Thirsk. 



96. Ophiocytium parvulum (Perty) A. Br. 



[Syn. Brochidium parvulum Perty]. 

 Mid W. — Cocket Moss, near Giggleswick. :Malham Tarn 

 Bog. Boston Spa. 



Family CHROOLEPIDACE^. 

 Genos TRENTEPOHLIA Mart, 1817. 



97. Trentepohlia aurea (L.) Mart. [Syn. Byssus aureus 



L.> 1 753 j Chroolepus aureus Kiitz., 1843]. 



S.W. — Fairly general away from the towns ; most abundant 

 in the limestone districts. Sheffield (S. Anston ; A. Carr). 

 Roche Abbey (F. A. Lees). Bingley. Snaith and Conisborough 

 (H. F. Parsons). 



Mid W. — Ilkley. Bolton Woods. Knaresborough and Sher- 

 burn (F. A. Lees). Deighton. Wetherby. Tadcaster. Amcliffe. 

 Giggleswick. Ingleton. Moughton Fell. Upper Ribblesdale 

 (F. A. Lees). 



N.W. — Cronkley Fell. Lund's Fell. Hawes. Dent Dale. 



N.E.— Staithes! (C. Crossland). 



Trans. V.N.U., 1896 (pub. Sept. 1900). Bol. Series, Vol. :;. 



