294 The Scottish Naturalist. 



fibrillis fere evanescentibus ; axis centralis crassus pallidus, 

 fibrillce medullares compactae alboe I — : K — . 



Prope Somerset Africse australis (Prof. P. MacOwan et J. H. 

 M'Lea). 



Similis et arete affinis U. subluridce. 



Usnea spilota sp. nov. — Similis praecedenti sed fibrillae medul- 

 lares I vinoso-violaceae, K fl. dein rubentes. 



King's Island, Queensland (coll. E. Spong, No. 193). 



This is one of the extensive collections of lichens sent by 

 Baron Ferd. von Miiller of the Colonial Museum, Melbourne. 



On the supposition that U. plicata (of which I possess speci- 

 mens) gives negative reactions on the axis and medullary fibres 

 by means of K and I, there is another from Ben Lawers which 

 has different reactions, &c. 



Usnea comosa sp. nov. — Similis U. plicate et longit. interdum 

 fere sesquipedalis, sed fibrillar medullares K fl. dein auran- 

 tiaco-rubentes vel etiam rubentes. Axis mediocris pallidus, 

 fibrillae medullares minus compactae, interdum fere arach- 

 noideae. 



Ben Lawers Scotiae et prope Moffat (Rev. G. MacConochie). 



Usnea nitida sp. nov. — Thallus elongatus (longit. usque 7 polli- 

 cum attingens) acute et longe ramosus, pendulus sed firmus, 

 nitidtis, cylindricus, creberriter nigro-articulatus ; axis medi- 

 ocris vel crassiusculus, fibrillae medullares K fl. ; I — . 



In monte Lawers Scotiae. 



The habit of this lichen is that of U. plicata, although more 

 rigid. The articulations are frequent, while the stems and 

 branches are always blackened at the articulations ; elsewhere 

 they are smooth, even somewhat glistening, and cylindrical, not 

 inflated as in U. articulata. 



Usnea subfloridana sp. nov. — Similis omnino U. florida sed 

 fibrillae medullares K flaventes : I — . Soredia K fl. 



A pud Ben Lawers Scotiae. 



Usnea Pinkertoni (Strn.) — Similis floridce, sed pendula et densis- 

 sime et intricate ramosa (ramulis longis, filiformibus un- 

 dulatis); receptacula apotheciorum dense et longe fibrillosa, 

 fibrillis intricate ramosis, longitudine interdum sesquipolli- 



