Pe ee 
84 CYCLOCARPINEX [PARMELIELLA 
The genus Coccocarpia, in which this lichen has been included by 
Nylander and others, was based on species from which P. plwmbea 
differs in the structure of the thallus and in the algal constituents. 
As already remarked by Nylander (1. c.), var. myriocarpa is scarcely 
to be distinguished from the species. It is marked by crowded 
tubercles, especially towards the centre of the thallus, and is evidently 
a growth form, as there are all gradations from the tuberculose to the 
smooth thallus even on one specimen. The rhizinose hypothallus is 
sometimes very luxuriant (panniform). The apothecia are normally 
bright-coloured, but may become dark-brown. 
Hab. On the trunks of old trees, on mossy boulders and walls in 
maritime and inland wooded regions.—Distr. General and common 
throughout the British Isles—B. M. La Coupe, Jersey; Guernsey ; 
Alderney ; near Penzance, Bodmin, Pentire, Bocconoe and Respring, 
Cornwall; Clovelly, South Brent, Bolt Head, Throwleigh, Totnes, 
near Slapton, Lidford, Okehampton and Torquay, Devon; Appuldur- 
comb, I. of Wight; Danny Wood, Tilgate and Eridge Rocks, Sussex ; 
Romney Marsh, Kent; Aberdovey, near Dolgelly and near Barmouth, 
Merioneth; Bettws-y-Coed, Denbighshire; I. of Anglesea; Eggle- 
stone and Teesdale, Durham; Windermere, Westmoreland ; Keswick 
and Ennerdale Lake, Cumberland; Maxwelton, Dumfriesshire ; New 
Galloway, Kirkeudbrightshire; near Campsie, Stirlingshire; near 
Inverary, Barcaldine, Appin, Oban and Head of Loch Awe, Argyll; 
Glen Falloch, Glen Lochay, The Trossachs, Aberfeldy, Rannoch and 
Killin, Perthshire; Clova, Forfarshire; Craig Coinnoch, Braemar, 
Aberdeenshire; S. of Fort William and Glen Nevis, Invernessshire ; 
Cawdor Castle, Nairnshire; Applecross, Rossshire; Castlebernard, 
Cork; Cromaglown and Blackwater Bridge, Kerry; Connemara, 
Galway; Achill and Louisburgh, Mayo. 
5. P. melantera A. L. Sm.—Thallus effuse, squamulose, 
cracked into areole, black, the squamules thickish, minutely 
papillose, bluish-black beneath. Apothecia small, sessile, plane 
or somewhat shining ; hypothecium brownish ; paraphyses septate, 
rather stout; spores elongate, simple or 1—3-septate, 30-45 p 
long, 4-5 p thick; hymenial gelatine bluish, the asci tawny, 
with iodine-—Pannaria melantera Stirt. Scott. Nat. v. p. 16 
(1879); Leight. Lich. Fl. ed. 3, p. 544. Pannularia melantera 
Cromb. in Grevillea xviii. p. 44 (1889) & Monogr. i. p. 344. 
Specimen not seen. 
A doubtful Parmeliella, but impossible to classify with certainty 
in the absence of data as to the gonidia contained in the squamules. 
Hab. On mica-schist rocks, Ben Lawers, Perthshire. 
29. PANNARIA Del. ex Duby Bot. Gall. p. 606 (1830); 
emend. Nyl. in Flora Ixii. p. 360 (1879). (PI. 29.) 
Thallus granular, squamulose, or almost foliose, with a dark 
hypothallus of felted hyphe on the under surface, the upper 
cortex a plectenchyma of vertical cell rows. Algal cells Nostoc. 
Apothecia becoming superficial, disciform with a thalline margin ; 
hypothecium colourless or pale-coloured ; spores 8 in the ascus, 
elongate-ellipsoid, or almost fusiform, simple, colourless. Spermo- 
