150 
3rd Ed.; in having a lighter-coloured thallus, with a ferruginous 
tinge, and reaction K— C—. 
. leucospeirea, Nyl. On sandstone rocks, St. Bees. 1879. 
. erysibe, Ach. On walls and rocks. Not common. Asby. 1879. 
Forma obscurata, Nyl. Thallus nigro-fuscous, or black, leproso- 
gravulose, diffract. Onan old wall, Asby. 1880. 
L. ralfsii, Salw. MS. On maritime rocks. Said to be rare, but very 
plentiful on the rocks about Barrowmouth, and east of St. Bees. 
It covers the light surfaces in thin, dark masses, with a slightly 
green or bluish-green cast. 1879. 
LD. hematomma, Ehrh. Keswick (Mrs. Stanger) ; on the walls, road side, 
between Skelton and Catterlen. 
L. ventosa, Ll. On hard rocks, in mountainous regions ; easily recognised 
by its thick dark sulphur-green thallus and its large deep-red 
apothecia. Not common. Keswick (Mrs. Stanger); Ullock Pike, 
Bassenthwaite ; Bowness Knot; and the fell sides, Ennerdale. 1879. 
Sw 
Pertusaria, 
P. multipunctata, Turn. On trees, and bark which still covers a decaying 
trunk. Moor End Wood, Asby. 1880. Distinguished from 
P. velata by different reaction. 
P. dealbata, Ach. On rocks. Herdhouse Fell, Ennerdale. 1880. Not 
common. 
P. communis, D.C. On trees, very common. Keswick (Mrs. Stanger) ; 
Braithwaite ; Calder Abbey ; Hale; Lamplugh. General. 
Forma rupestris, D.C. On rocks, common. On walls about Calder 
Bridge. 1879. 
P. fallax, Pers. On trees. Common about Whitehaven ; Greenbank ; 
Asby ; Calder Abbey ; Keswick. 1879. 
P. velata, Turn, On trees. Braithwaite and Keswick. 1879. 
P. faginea, L. Ontrees. Asby ; Keswick ; in a barren state. 1879. 
P. pustulata, Ach. On trees. Catterlen ; Keswick. 1879. 
P. leioplaca, Ach. Thallus pale yellowish or creamy, smooth, pustules or 
verrucz larger, but less prominent, than those of P. pustulata, and 
not quite so scattered. On trees, frequent. Keswick ; Asby ; 
Calder Abbey. 1879. 
P. spilomanthodes, Ny]. A new lichen, found upon the syenite rock, some- 
where about the foot of Bowness Knot, Ennerdale, 1880. I obtained 
a good specimen, but regret that, after twice carefully searching, I 
have not again been able to meet with it. Thallus cinereous, 
thickish, rimoso-diffract, surface much and deeply wrinkled, very 
