50 NEW BRITISH LICHENS. 
On serpentine rocks of the Khoil,in Braemar. July, 1865. This 
species was first distinguished as such by the late Admiral Jones, 
was subsequently gathered by Mr. Carroll, on Mangerton, in Ireland, 
and last autumn was again found by me in pretty fair quantity on the 
Khoil, and also sparingly on schistose boulders in Glen Callater. Its 
systematic place is intermediate between the preceding and L, theiodes, 
Sommerf., which may also occur in the Grampians. 
7. L. postuma, Nyl.; thallus greyish, thin, evanescent; apothecia 
black, minute, plane, margined, concolorous within; spores 6-8 in 
theese colourless or brownish, elliptical-oblong, 3-septate, 0:015—16 
mm. long, 0006-7 mm. thick, epithecium and hypothecium brownish ; 
hymeneal gelatine deep blue with iodine. 
On calcareous stones, in gravelly places near the summit of Mor- 
rone, in Braemar. July, 1865. Probably not very rare, though but 
a single specimen was then gathered. It approaches very closely to 
L. petrea, Flot., of which it perhaps ranks only as a subspecies. 
8. Rimularia limborina, Nyl.; thallus greyish, thin, rimulose or 
subareolate ; apothecia black or brownish-black, rugulose, somewhat 
depresso-convex, roundish, depressed in the centre and radiately 
fissured, greyish within; spores 8 in thecze, colourless, at length brown- 
ish, elliptical, simple, 0-018-25 mm. long, 0:011—16 mm. thick, 
paraphyses slender, irregular and often branched, perithecium black 
above, brownish-black below; hymeneal gelatine tawny-red with 
iodine. 
On weathered calcareous stones on Craig Guie, essa August, 
865. This new genus and species is described by Nylander from a 
specimen gathered, about the same time as my own, by Ripart in 
Haute Vienne. It is allied to the genus Mycoporus, and along with it 
may be considered as constituting a separate tribe, which Nylander 
proposes to call Peridiei. Further research may discover this lichen 
elsewhere in mountainous regions. 
Besides these I have also met with the following new forms of 
other Lichens, viz. :— 
1. Parmelia lanata, var. subciliata, Nyl., ** with the thalline laciniæ 
and apothecia ciliated at margins,"—On limestone rocks of Morrone, 
in Braemar, rare. 2. Lecanora varia, var. symmicta, f. livescens, Nyl., 
with small livid apothecia.— On old trunks of trees, at High Beech, 
Epping Forest, sparingly. 3. Verrucaria cinerella, var. megaspora, 
