482 EET. J. M. CEOMBIE OIS' NEW BRITISH LICHEXS. 



would bring to light many additions and novelties to our Lichen- 

 flora. 



1. Spilonema scoticum, Nyh in Flora, 1869, p. 82. Thallus black, 

 forming small^ compact, convex, pulvinate patches : apothecia black, 

 very minute, the epithecium impressed or convex; spores 8 In thecae, 

 colourless, oviform-oblong, 1-septate, ■010--014 miUim. long, about 

 •0045 millim. thick: paraphyses discrete, slender : epithecium vaguely 

 obscure, hypothecium colourless : hymeneal gelatine blue with iodine. 



On damp micaceous rocks of Ben Lawers above Loch-na-Cat, 

 August 1867. Eare, and but very sparingly fertile, though, 

 from the small size of the apothecia, almost invisible to the naked 

 eye, these are very apt to be overlooked. It is allied to S. re- 

 verfenSj Nyh, from which, however, it is sufficiently distinguished 

 by the size of the apothecia and the character of the spores. 



V 



2. Pyrenopsis homceopsis, NyL in Flora^ 1868, p. 342. Thallus 

 brown, thin, effuse, subgranulose : apothecia concolorous, lecanorine, 

 small, epithecium colourless, paraphyses slender: spores '011-'018 

 millim. long, *007-'OlO millim. thick: hymeneal gelatine reddish 

 wine-coloured, or yellowish wine-coloured with iodine. 



On micaceous boulders on the summit of Ben Lawers, August, 

 1867. Apparently very rare, and seen only in small c^uantity, 

 growing along with Zecanora frmtulosa, Dcks. It is most nearly 

 allied to P. grumtclifera^ a Scandinavian species, but differs from 

 this, amongst other characters, in its larger spores and gonima. 



3. Lecanora hypoph^a, Nyl. in Flora,^870, p. 34. Thallus inde- 

 terminate, greyish or greyish-green, thin, granulate, unequal ; apo- 

 thecia reddish black, lecidean, at first plane, margined, the proper 

 margin black, subcrenulate or undulated, then somewhat convex, 

 with excluded margin : spores innumerable, oblong, '005-'U06 milUna- 

 long, '0015 miUim. thick : paraphyses of about medium thickness, 

 articulated : hypothecium colourless, beneath slightly dark brownish : 

 hymeneal gelatine wine- or tawny-red with iodme. 



On granitic stones of a wall near old Machar Cathedral, Aber- 

 deen, August 1869. Not unfrequent in one or two spots in 

 that locality, and often athalline, though, from the nature of the 

 stone, only a single good specimen was obtained. It is allied to 

 i, jprivigena^ Ach., from which it is separated by the above 

 characters. 



4. Lecidea lithophiliza, Nyl, in Flora, 1868, p. 473. Thallus 

 greyish white, firm, unequally deplanate, areolate-difi^ractate or areo- 

 late-rimose, thin : apothecia brownish black, brown when moist. 



