NEW BIUTISH LICHENS. 37 



Tliallus indicated by brownish black detaclied well defined spots ; 

 apotliecia black almost innate and hemispherical, many being 

 closely congregated in each spot, epithecium dimidiate ; spores 4 

 to 8 colourless, at length brown oblong, 1- septate rather large ; 

 paraphyses numerous, branching not very distinct. Gel. hym. tinted 

 blue or violet, with iodine. 



Verrucaria peltophora. St?-/i. — Thallus squamulosus, squamulis 

 tenuibus viridibus lajvibus appositis vel sejunctis margine recurvis ; 

 apotliecia nigra mediocria vel majuscula prominula hemisphwrica, 

 }ieritliecio dimidiato ; sporte Snaj, fuscai ellipsoidese muralidiviste, 

 •U35-'048 X •02--03 m.m. ; paraphyses parcee graciles, guttalis 

 oleosis inspersae, filamentis osteolariis numerosis. Gel. hym. iodo 

 vinose riibens. 



Supra terram apud, Ben Lawers. 



Thallus squamulose, squamules thin green, smooth, either ap- 

 proximated or scattered ; apothecia black, large, prominent peri- 

 tliecium dimidiati ; spores 8, fuscous elliptical, muralilocular, 

 rather large ; paraphyses few, filiform, interspersed with oily 

 globules, osteolar filaments numerous. Gel. hym. wine red with 

 iodine. 



Verxucairia coUeta. .S"?;?';*.— Thallus niger tenuis continuus ; apo- 

 tliecia nigra parva, latit. (•1--2 m.m.), sphaerica interdum fere 

 aggi-egata, perithecio integro, epithecio poriformii ; sporae, 8nse, in- 

 colores fusiformes constrictaj, l-septata3 interdum curvul^e, •032"-045 

 X "Ol-'Olo m.m. ; paraphyses valde indistincta^ fere couglutinatse. 

 Gel. hym. intra thecas iodo vinose rubens. 



Supra Gymnomitrium concinnatum apud, Ben Lawers. 



Gonidia are seen interspersed, having, in many instances, a dia- 

 meter from "016 to "02 m.m., but it is questionable whether they 

 belong to the thallus of this lichen. 



Thallus black, thin, continuous ; apothecia black, small, diameter 

 from •! to '2 m.m., sphgerical, at times almost aggregate, perithe- 

 cium entire ; spores 8, colourless, fusiform, often constricted at the 

 middle, 1-septate, large; paraphyses very indistinct. Gel. hym. 

 within the asci, wine-red with iodine, the restuntinted. 



Lecidea alpicola. Schm\ Ben Lawers.— Mr. Leighton adduces 

 this lichen, in his " Lichen Flora," as having been gathered by 

 Mr. Crombie on Ben Nevis, but as the latter omits it in his " Lich. 

 Brit.," and inserts in its place, L. galbula, there is evidently some 

 mistake. Mr. Leighton, besides, speaks of the spores as colourless; 

 now it is only at an early stage they are so ; when mature, they are 

 of a beautiful green colour, merging ultimately to brown. 



