NEW BRITISH LICHENS. 49 
thecze, colourless, elliptical, simple, 0:007-8 mm. long, 0:0025-35 mm. 
thick, paraphyses not discrete, epithecium colourless or obscure, hypo- 
thecium obscurely brown throughout; hymeneal gelatine wine-red 
"with iodine. 
n old rails in the New Forest, near Lyndhurst, on the road to 
Menstrie. September, 1866. Abundant, and likely to occur else- 
where in that neighbourhood. It is allied to L. myriocarpoides, Nyl., 
and approaches also to L. dispansa, Nyl., and L. turgidula, Fries. 
4. L. leptostigma, Nyl. ; thallus (if proper) dirty white, rimulose ; 
apotheeia brownish-black, innate, small, gregarious ; spores 8 in thee, 
globose or ellipsoid, uniseriate, 0005-9 mm. in diameter, paraphyses 
of medium thickness, hypothecium scarcely yellowish; hymeneal gela- 
tine not coloured 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 Z. resine, Fries, and Z. 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 thecze, ellipsoid, 0009-13 mm. 
long, 0-005-6 mm. thick ; paraphyses slender, usually not discrete, 
apothecium brownish, bypothaeium colourless ; hymeneal gelatine blue 
with iodine. 
On a gneissie boulder ou the descent from Ben Lomond to Loch 
Ards 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 areolz ; 
apothecia black, of medium size, innate, somewhat convex, immargi- 
nate, obscurely greyish within ; spores S in thecze, colourless, elliptical, 
0:010—12 mm. long, 0:006—7 mm. thick, apothecium bluish-black, pa- 
raphyses not well discrete, hypothecium colourless or faintly reddish ; 
hymeneal gelatine blue with iodine. 
VOL. VII. [FEBRUARY 1, 1869.] - E 
