252 OSCILLATOREiE. 



12. OSCILLATORIA MUSCORUM A^. 



Plate LXXII. Fig. 12. 



CJiar. Stratum dark cBruginous green, shortly radiating^ creep- 

 ing over mosses. Filaments thickish, pale blue green. 

 Striae distant. 



O. muscorum Ag. Syst. p. 375.; Harv. Hook. Br. Flor. 

 365. ; Manual, p. 164. 



Hab. On Hypnum ruscifolium in rapid streams : Captain 

 ^^^-tn-^ Carmichael. 



^ / " Stratum three or four inches in extent, closely inter- 

 woven with the branches and leaves of mosses, of a bluish 

 green colour, and slightly lubricous. Filaments a line or two 

 in length, variously curved, and radiating. Stri^ at the 

 distance of a diameter from each other." — Carm. MS. Fila- 

 ments brittle, about equal in diameter to those of O. turfosa, 

 and when examined in the dried state, usually found to be 

 much broken up, with the strijB all but invisible. 



b. Filaments^ea;M0M5, coriaceous, 

 13. OSCILLATORIA CORIUM Ag. 



t 



-Char. " Stratum thick, sub coriaceous, opaque, dull broicnish, 

 streaked with pale green. Filaments yellowish, slender. 

 Striae indistinct, distant.''"' — Harv. 



O. corium Grev. Flor. Edin., p. 303. ; Harv. Hook. Br. Fl. 

 p. 377. ; Harv. Manual, p. 166. 



Hab. On the rocky bottoms of alj)ine rivulets. 



" Stratum thick, tough, dull brownish ; occasionally 

 streaked Avith pale green, which in some varieties is the pre- 

 vailing colour, slightly glossy when dry; filaments slender. 

 In some situations it radiates in fascicles from its whole upper 

 surface ; in others, it is found almost denuded of radii, and 

 forming a compact leathery stratum." — Harv, 



