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NETV BRITISH LICHENS. 49
thecfe, colourless, elliptical, simple, 0'007-8 mm. loug, 00025-35 mm.
thick, parapliyses not discrete, epitheciura colourless or obscure, liypo-
thecium obscurely brown throughout ; hymeneal gelatine wine-red
with iodine.
On old rails in the New Porest, near Lyndhurst, on the road to
Menstrie. September, 1866. Abundant, and likely to occur else-
where in that neighbourhood. It is allied to L. wyriocarpcAdes, Nyl.,
and approaches also to L. dhpanm, Nyl., and L. turgidula, Fries.
4. L. leptostigmo, Nyl. ; thallus (if proper) dirty^ white, rimulose ;
apothecia brownish-black, innate, small, gregarious ;
spores 8 in thecse,
globose or ellipsoid, uniseriate, 0"005-9 mm. in diameter, parapliyses
of medium thickness, hypothecium scarcely yellowish ; hymeneal gela-
tine not colouied with iodine.
On a micaceous weathered boulder, near Loch-na-Cat, on Ben
Lawers. August, 1867. Apparently extremely rare, and gathered
only very sparingly. It is allied to L. resinix, Fries, and L. tantilla,
Nyl. ; all three British species being with difficulty separated from
the Fungi.
5. L. mesotropa, Nyl. in Flora, 1867, p. 328 ; thallus greyish, verru-
coso-areolate, indeterminate, of medium thickness ; apothecia brownish-
black or black, opaque, somewhat plane, adnate, the margin obtuse or
evanescent, white within; spores 8 in thecje, ellipsoid, 0'009-13 nun.
long, 0'005-6 mm. thick ; paraphyses slender, usually not discrete,
apothecium brownish, hypothecium colourless ; hymeneal gelatine blue
with iodine.
On a gneissic boulder on the descent from Ben Lom,ond to Loch
Ard. August, 1865. Probably not unfrequent in Highland dis-
tricts, though not found by me since. It belongs to L. contigua. Fries,
and its allies, with which, unless the spores are examined, it may
readily be confounded.
6. L. Crombiei, Jones ; thallus greenish sulphur-coloured, of me-
dium thickness, unequal, rimoso-diffractate or subareolate, limited by
the black hypothallus, which is everywhere visible between the areolae ;
apothecia black, of medium size, innate, somewhat convex, imraargi-
nate, obscurely gi'cyish within ; spores 8 in thecfe, colourless, elliptical,
0-010-12 mm. long, 006-7 ram. thick, apothecium bluish-black, pa-
raphyses not well discrete, hypothecium colourless or faintly reddish
hvmeneal gelatine blue with iodine.
VOL. VII. [FEBRUARY 1, ISfiS.] E
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