W. WEST AND G. S. WEST : ALGA-FLORA OF YORKSHIRE. 77 

 ft, 



S.E. — Riccall Common. 



347. Cosmarium humile (Gay) Nordst. 



[Syn. C. celatiDii Ga)]. 

 Var. substriatum (Nordst.) Schmidle. • 



[Syn. C. substriatum Nordst.]. 

 S.W. — Rawcliffe Common. 



Mid W. — Penyghent. Staveley Dam, near Knaresborough. 

 Wigton INIoor. 



N.E. — Strensall Common. Pilmoor, near Thirsk. Malton. 

 S.E. — Riccall Common. Sldpwith Common. Market Weigh- 

 ton. Hornsea Mere. 



Var. striatum (Boldt) Schmidle. [Syn. C. striatum Boldt]. 

 N.E. — Pilmoor, near Thirsk. 



C. humile, C. striatum, C. substriatum, and C. danicum are 

 unquestionably all forms of the same species. This was first 

 directly pointed out by Schmidle in Flora oder AUg. Bot. Zei- 

 tung, 1894, heft I, p. 53 ; he afterwards placed C. striatum, 

 C. substriatum, C. danicum, C. subhumile, and other forms as 

 varieties of C. humile; cfr. Oesterr. Botan. Zeitschrift, 1895, 

 nr. 7, p. 18 (Sep.). 



348. Cosmarium Blyttii Wille. 



S.W. — Cragg Vale, towards Blackstone Edge. 

 Mid AV. — Cocket Moss, near Giggleswick. 

 N.W. — Mickle and Cronkley Fells. 

 S.E. — Skipwith Common. 



349. Cosmarium Bceckii Wille. 

 Mid W. — Malham Tarn. 



N.W.— Mickle Fell. 



350. Cosmarium subprotumidum Nordst. 

 N.E.- — Strensall Common. 



Var. Gregorii (Roy & Biss.) Nob. 



[Syn. C. Gregorii Roy & Biss.]. 

 Mid W. — Roundhay Park, Leeds. 

 N.E. — Pilmoor, near Thirsk. 

 S.E. — Hornsea Mere. 



