OSCILLATORIA. 259 



Scytonema Bangii Lyngb. Dan. t. 28. Oscillatoria Bangii 

 Carm. MS.; Grev. Edin. p. 303. O. Friesii Harv. 

 Hook. Brit. Fl. 373.; Harv. in Manual, 162. 



Hob. On mosses in shady subalpine situations, near Edin- 

 burgh : Dr. Greville. Appin : Capt. CarmichaeL Kil- 

 larney : W. H. Harvey. Co. Kerry : Mr. Andrews. 



" Stratum two or three inches broad, bright aeruginous 

 green. Filaments closely interwoven into -erect, elongated, 

 tooth-like fascicles, an inch or more in height, pale green ; 

 under the microscope annulated within, with a broad limb or 

 border. Well marked by its erect spinulose habit." Harv 

 The filaments in the dried state are flaccid, long, and apparently 

 of equal diameter. Striae scarcely conspicuous, rather close. 



26. OSCILLATORIA LUCIFUGA Harv. 



Plate LXV. Figs. 5, 6. 



Char. Stratum blackish green, bristling with minute tooth- 

 like fascicles of filaments. Filaments subulate. 



Calothrix lucifuga Carm. MSS. ; Harv. Hook. Br. Flor. 

 p. 373. ; Harv. Manual, p. 162. 



Hob. " On the decayed trunk of an alder, lying in a ravine, 

 and buried under a heap of rubbish," at Appin : Capt. 

 CarmichaeL 



" Stratum spreading, dull, blackish green, bristling all over 

 with minute erect fascicles about one-third of a line high. 

 Filaments thickish, flexuous, strongly agglutinated together, 

 annulated within, pale yellowish. Almost like the last species 

 in miniature " (Harv.), of which it may be but a variety. 



27. OSCILLATORIA TENUISSIMA Ag. 



Char. " Dark green, ascending, tufted. Filaments simple, 

 cylindrical, even, without any visible joints ." Harv. 



O. tenuissima Sm., Eng. Bot. t. 2584. ; Harv. in Hook. Br. 

 FL 373.; Harv. in Manual, p. 162. 



6 2 



