REV. J. M. CROMBIE ON NEW BRITISH TilCHENS. 4S9 



somewliat doubtful, asNylander observes, to what genus this spe- 

 cies belongs. There is present a white, thin, areolate, diffractate, 

 evanescent, lecidean thallus ; but this seems scarcely proper ; and 

 also another obscure thallus nearly obsolete, adnate, or under the 

 apothecia, with green elliptical gouidia (almost gonima), thickly 

 involute, which would appear to be the real thallus, inasmuch as 



this is constantly present, while the other is frequently absent. 



23, RiMULARiA LiMBORiNA, Nt/L in Flora, 1868, pp. 346, 476. 

 Thallus greyish, thin, rimulose or subareolate: apothecia black or 

 brownish black, rugulose, somewhat depresso-convex, small, roundish, 

 subradiately fissured, greyish within : spores eight in theeaj, colourless, 

 at length brownish, elhptical, simple, •018-'025 millim. long, 'Oll-'Oie 

 niillim, thick; paraphyses slender, irregular, and often branched: 

 peritheclum black above, brownish black below : hymeneal gelatine 

 tawny red with iodine. 



On weathered calcareous stones on Craig Guie, Braemar, 

 August 1865. This new genus and species was described by 

 Nylander in the Flora from a specimen gathered about the same 

 time as my own, by^ Eipart, in Haute Vienne. It is allied to the 

 genus Mycopointm, and along with it maybe regarded as consti- 

 tuting a separate tribe, which Nylander has called Peridiei, inter- 

 mediate between the Graphidei and Pyrenocarpei. 



24. Endocarpon Crombiei, Mudd, Brit, Clad. p. 36. Parasitic on 

 thallus of Thamnolia vermicularis : apothecia verrucaeform, lateral, 

 minute, at length emersed, confluent, each verruca containijig many 

 nuclei : ostiola very minute, punctiform, depressed, pale reddish 

 brown : nucleus subgelatinous in yellowish brown subceraceous tunic : 

 paraphyses slender, discrete; spores 8 in thecae, very minute, elliptical, 

 unilocular, occasionally obscurely bilocular, hyaline. 



Apparently not very rare on the higher Grampians of Scotland, 

 as Ben Lawers, Morrone, Ben-na-boord, on which last mountain 

 it was first discovered by me in August 1862. Though regarded 

 by Mudd, L c, as a true lichen, Nylander considers it a fun- 

 gilhis ; and indeed it seems to be one of those anomalous things 

 of which the systematic place is at present rather doubtful. 



In addition to these, I have also met with the following new 

 forms of other lichens, which I may here briefly notice, viz. : 



1. Parmelia lanata^ var. sulciliata, N'yL, with thallus depressed, 

 suborbicular, the lacinia) and apothecia ciliated at the margins. 

 Rare, on limestone-rocks of Morrone, in Braemar. 2. Lecanora 



umbrinay* prosechoidcs, Nyl., with small black or brown apothecia, 



