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. vStat. Plon, 1896, p. 163, c. fig.) as 

 / longispina. This variety has not previously been recorded 

 for the British Isles. 



95. Ophiocytium majus Nag. 



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

 near Knaresborough. 



N.E. — Pilmoor^ near Thirsk. 



96. Ophiocytium parvulum (Perty) A. Br. 



[Syn. Brochidiiini parvulum Perty], 

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

 Bog. Boston Spa. 





i 



Family CHROOLEPIDACE/E. 



Genus TRENTEPOHLIA Mart., 181 7. 



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



L., 1753; Chroolepus aureus Yixxtz. J ^^43]* 



SAV. — 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 Com'sborough 

 (H. F. Parsons). 



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

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

 Giggleswick. Ingleton. Moughton Fell. Upper Ribblesdale 

 (F. A. Lees). 



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

 N.E.^-Staithes! (C. Crossland). 



Trans. Y.N.U., 1896 (pul>, Sept. 1900). Dot. Serlw, Vol. 5. 



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