84 The Rev. Huen Davızs’s Remarks on Lichen scaber 
nigricans supra sordide albus, ramis patentissimis subulatis." 
Consequently L. sarosus of this author, p. 1578, for which he 
refers to the above-quoted figure, with a concise vague defini- 
tion, * L. niger durus," should be omitted. It is likewise L. bi- 
color of Acharius, Prodr. p. 215, whose description of it is ex- 
cellent, and as follows: E. caulescens solidiusculus erectus rigidus 
fruticulosus ater, summitatibus cinereofuscis, ramis fibrillosis 
diffusis vagis attenuatis." As is also that of Smith, Eng. Bot. 
1853. “ L. bicolor, black and grey shrubby Lichen.” Spec: 
Cuar. Shrubby, solid, erect, rigid, round, black, with numerous, 
spreading, compound, capillary, tapering branches, whose upper 
partsare grey." But it is L. lanatus of Lightfoot, Fl. Scot. p. 892. 
It is likewise n. 1967, Hall. Helv. who refers to this figure, as well 
- as to L. lanatus of Linnzeus: but it is curious to observe how 
Haller omits the word. ** decumbens" in Linnezus's definition, to 
accommodate it to his shrublike plant. The unlucky reference 
of Linnzus to this figure, for his L. lanatus, has propagated an 
error through a series of almost numberless volumes. 
II. Fig. 9. t. xin. and f. 32. t. xvii., as we have proved them 
to be one and the same species, will be the true Licuen lanatus 
of Linneus, of Hudson, of Acharius and of Smith. It is in- 
deed the pubescens of Lightfoot, 893; but which, as a species, 
proves, from what has been said, to be a phantom, and vanishes. 
II. Fig. 31. t. xvii. is var. y of Licnen islandicus Linn. ; but 
is the hispidus of Lightfoot, Gmelin Syst., Smith Eng. Bot., 
Withering, and Sibthorp, but the aculeatus of Acharius, Prodr. 213. 
IV. And lastly, Lıcuen scaber of Hudson, Fl. Ang. 562, 
which is the exilis of Lightfoot, and has been erroneously quoted 
for, or as a variety of L. lanatus, stands firmly as a distinct and 
well defined species, under the following definitions ; * L. (exilis) 
filamentosus ramosissimus ceespitosus, filamentis capillaceis im- 
plexis 
