28 EXPERIMENTS ON THE COLORIFIC PROPERTIES OF LICHENS. 
tained similar results. Thus a correspondent in Montreal (Mr. A. 
T. Drummond) wrote me, in September, 1869, as follows : — 
“ Parmelia Borreri , which is very common on trees, rails and 
gneiss, yields on ammoniacal maceration a purple dye. The Um- 
bilicarias, which are frequent among the Laurentian rocks, yield 
red by the same process.” 
[The foregoing is but a brief introduction to a voluminous series 
of elaborate tables of details of experiment, which it is not neces- 
sary, even were it easy, to publish in “ Grevillea.”] 
NEW BRITISH LICHENS. 
Communicated by the Rev. J. M. Crombie, F.L.S. 
The following interesting discoveries by Mr. Larbalestier in N. W. 
Ireland, have recently been recorded by Dr. Nylander in the 
“ Flora,” 1879, pp. 201-207, and 220-224:— 
1. Lecanora umbraticula. Nyl . — Thallus greenish, thin, suble- 
prose ; apothecia carneo-luteous or subluteous, somewhat plane, 
biatorine, whitish within ; spores 8 nae, fusiform, usually simple, 
sometimes thinly 1 -septate, 0*008-16 mm. long, 0 002-3 mm. 
thick ; paraphyses submoderate, epithecium and hypothecium 
colourless. Hymenial gelatine, wine-red with iodine. 
On shady calcareous rocks. Kylemore, Galway. Closely 
allied to L. albocarnea. 
2. Lecidea alboxubella. Nyl. — Thallus whitish or greenish- 
white, very thin or evanescent ; apothecia yellow or reddish flesh- 
coloured, somewhat convex, immarginate, colourless within ; 
spores 8 nae, bacilliform or fusiformi -bacillar, 3-septate, 0*014-21 
mm. long, 0*002 mm. thick, paraphyses slender, epithecium and 
hypothecium colourless. Hymenial gelatine, tawny wine-red with 
iodine. 
On calcareous rocks. Kylemore. A peculiar species, belonging 
to the section of Lecidea bacillifera. Nylander observes that hy- 
meniicole gonidia are sometimes present, as is the case with other 
Lecideas. 
3. Lecidea byssoboliza. Nyl. — Thallus greenish or greyish- 
green, opaque, very thin, continuous, indetermediate ; apothecia car- 
neo-luteous, somewhat prominent, the margin at length undulated 
(paler or scarcely distinct), colourless within; the base externally 
circumpubescent (radiating), with a shortish white byssus; spores 
8 nae, fusiform, 3-5 septate, 0 023-27 mm. long, 0*003-4 mm. 
thick, paraphyses slender, epithecium and hypothecium colourless. 
Hymenial gelatine, pale-bluish, and then tawny wine-coloured with 
iodine. 
