COSMARIUM. 225 



angles slightly rounded and not projecting; granulation 

 not fundamentally different from that of the type. 



V J 1 



Length 1 5-1(5 ji ; breadth 14-14'5//,; breadth of 

 isthmus 5 /n ; thickness 8'5 ^. 



SCOTLAND. Xear Alford, Aberdeenshire (Roy 

 Bissett). 



Geogr. Distribution.- -Germany. Denmark (Born- 

 holm). X. Russia. Iceland. 



Var. glabrum Gutw. (PL LXXXV, figs. 23, 24.) 



Cosmarium humile (Gray) Nordst. var. glabrum Gutw. in Nuova Notarisia, 

 1892, p. 21; Flor. Glonow Galic. 1892, p. 132, t, 3, f. 14; Schmidle, 

 Beitr. alp. Alg. 1895, p. 389 [" glabratum"! West & G. S. West, Alg. 

 X. Ireland, 1902, p. 37. 



Outline of semicells as in the type ; central granule 

 present but the rest of the cell- wall destitute of 

 granules. 



Length 14'5-18'4 p. ; breadth 13'3-lG//,; breadth of 

 isthmus 4*2-4-6^ ; thickness 9%5-12 JJL. 



ENGLAND.- Westmoreland! W. and X. Yorks ! 

 Surrey ! Hants ! Devon ! Cornwall ! 



e/ 



SCOTLAND. Sutherland ! 



IRELAND. Common in Galway and Mayo ! Lousrh 



r-i 



Grartan, Donegal ! 



o 



Geogr. Distribution.- -Galici& in Austria. Sweden, 



198. Cosmarium Blyttii Wille. 

 (PL LXXXVI, figs. 1-4.) 



Cosmarium Blyttii Wille, Norges Ferskv. Alg. 1880, p. 25, t. 1, f. 7; 

 ? Wolle, Desm. U. S. 1884, p. 87, t. 19, f. 31-33 ; Nordst. Desni. 

 Gronl. 1885, p. 8, t, 7, f. 4 "forma] ; Freshw. Alg. N. Zeal. 1888, p. 49 ; 

 De Toni, Syll. Alg. 1889, p. 1013 ; West, Alg. N. Wales, 1890, p. 289 ; 

 Freshw. Alg. Maine II, 1891, p. 355; Alg. W. Ireland, 1892, p. 154; 

 Alg. Engl. Lake Distr. 1892, p. 727 ; Eoy & Biss. Scott, Desm. 1894, 

 p. 42 ; West & G. S. West, Alg. Madag. 1895, p. 64 ; Nordst. Index 

 Desm. 1896, p. 63 ; West & G. S. West, Welw. Afric. Freshw. Alg. 1897, 

 p. 122 ; Alg. S. England, 1897, p. 489 ; Schmidle, Ost-Afrika Desm. 

 1898, p. 28 ; West & G. S. West, Alga-fl. Yorks. 1900, p. 77 ; Freshw. 

 Chlorophy Koh Chang, 1901, p. 174 [inclus. f. minor]; Alg. N. Ireland, 

 1902, p. 38 ; Freshw. Alg. Ceylon, 1902, p. 172 ; Freshw. Alg. Orkneys 

 and Shetlands, 1905, p. 20 ; Further Contrib. Plankton Scott, Lochs, 

 1905, p. 484 ; Borge, Beitrage Alg. Schweden, 1906, p. 34 ; G. S. West, 

 Alg. Third Tanganyika Expedit. 1907, p. 121. 



Ursinella Blyttii Knntze, Eevis. gen. plant. 1891, p. 924. 



VOL. III. 15 



