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232 NEW BRITISH LICHENS.
non publieatum = Tetroncium Magellanicum,
Willd. (teste Willd. in Ma-
gazin d.Gesellschaft naturforscliender
Freunde in Berlin, 1808, ii. 17).
T. Ecegneri, C. Koch, Beitrage zur Flora
des Orients; Linn. 1849, xxii. 272,
an T. maritimse, var ?
T. salina, Wallr. Scholion zn Hampe's
Prod. Fl. Hercyniae in Linn. 1840,
xiv. 567 = T. maritima, L.
T. striata, E. et P. Fl. Pcriiv. et Chil.
1802, iii. 72.
T. triandra, Michx. Fl. Bor. Amer. 1803,
i. 208.
T. trichopbora, Nees ab Esenb. in PI.
Preiss. 1846-1847, ii. 54.
NEW BRITISH LICHENS.
By the Rev. James Crombie, M.A., F.G.S., E.L.S.
No. III.
Ill addition to those enumerated in the two former papers, there are
now to be described the following new species recently discovered by
me in the New Forest and in Scotland, one of which, however, had
previously been recorded by Mr. Mudd.
1. Lecidea tenera, Nyl. in Flora, 1869, p. 83 ; thallus ciitereous-
green, thin, somewhat subgranulate, indeterminate, everywhere rimu-
lose ; apothecia pale, minute, plane, with paler margin ; spores 8 in
thecse, colourless, oblong or subbacillar, simple or obsoletely 1-sep-
tate, 0-008-0-10 mm. long, 0-0015-00025 mm. thick ; parapliyses
moderately thickish, with clavate apex, epitliecium and hypothecium
colourless ; hymeneal gelatine blue with iodine, spermogones colour-
less, spermatia oblong.
On the smooth face of a granitic rock on tlie coast of Kincardine-
shire, S. of the Bay of Nigg. August, 1868. Though occurring
plentifully in one spot, it was seen by me nowhere else iu the neigh-
bourhood. It is allied to L. globulosa, Flk., from which it is suffi-
ciently distinguished by fiie above characteristics.
2. L. prceeavenda, Nyl. in litt. ; thallus obscure, tliin, scarcely
visible; apothecia black, plane or somewhat concave, margined, small;
spores 8 in thecse, faintly blackish, eUiptical, 1-septate, 0"014-17 mm.
long, 0/006-8 ram. thick ; paraphyses slender, epithecium obscurely
amber-brown, hypothecium somewhat reddish-brown, al)ove more in-
tense in colour ; hymeneal gelatine blue, and then wine-red with
iodine.