8o YORKSHIRE NATURALISTS' UNION. 



Euastruin Fokornyanuin, unconsciously confirms the view that 

 the two species are identical. 



As E. Pokornyammi was described four years previous to 

 E. binale var. angusfatu/n, the specific name ^ Fokoriiyanii/n' 

 must take precedence. 



361. Cosmarium cymatopleurum Nordst. 1872. 

 Mid WL — Penyghent, extremely rare along with Staurastrnin 



acarides, Cosinariian Etchachaneiise, C. speciosiiin, C. anceps, etc. 

 Var. tyrolicum Nordst., 1876. 



[Syn. C. subochthodes Schmidle, 1895, pro parte.]. 

 Mid W. — Shipley Glen, forming pure gelatinous masses on 

 wet shaly rocks. Penyghent. 

 N.W.— Lund's Fell. 

 Var. Archerii (Roy & Biss.) Nob. 



[Syn. C. Archerii Roy & Biss, 1893]. 

 Mid W. — Penyghent. 



Length, 91 )"' ; breadth, 67 /x ; breadth of isthmus, 24 \i. 

 The drawn-out apices of the semi-cells of this variety give it a 

 rather remarkable character, but this feature is not sufficient to 

 warrant its separation by Messrs. Roy and Bissett as a distinct 

 species. The specimens observed from West Yorkshire were 

 intermediate between the typical form and the var. Archerii with 

 regard to the produced apices \ they were also intermediate in 

 size, thus proving that these plants are forms of one species. 

 This species and its varieties are essentially alpine Desmids. 



362. Cosmarium Holmiense Lund. 

 S.W. — Ogden Clough. 



Mid W. — Baildon. Holden Ghyll, near Keighley. Near 

 Ilkley. Cowside Beck, Arncliffe. Moughton Fell. Heseltine 

 Ghyll. 



N.W.— Mickle Fell. Lund's Fell. Cowgill ^Vold Moss, Wid- 

 dale Fell. 



Var. integrum Lund. 



Mid W. — Malham Tarn. Bog two miles south of Clapham, 

 Cowside Beck, Arncliffe. Penyghent. 



Tfans. Y.N.U., 1897 (pub. Dec. 1900). Bot. Series, Vol. 5. 



