244 DR LAUDER LINDSAY ON THE SPERMOGONES AND PYCNIDES 
Specimen 5.—On trees, Morchone, Braemar, August 1856, W. L. L. This is the 
broad-lobed form—the P. aipolia of older authors. The spermogones are minute, 
black papillee; their envelope light brown; the spermatia from goth to apth long, 
and the sterigmata short and distinct. On roadside walls, between the Spittal of 
Glenshee and Braemar, August 1856, W. L.L. The spermogones are few; the 
spermatia about sath long; the sterigmata very distinct, irregular, composed of 
elongated, cylindrical, thick-walled cells, varying, however, considerably in size. 
Specimen 6.—On trees, Kinmundy, Aberdeen, Professor Dickiz. The disk of 
the apothecium is brown, instead of black, and the apothecia have consequently 
the appearance of those of Lecanora subfusca. The spermogones are abundant as 
black papillee or cones. The spermatia are rod-shaped, about sath long, and 
sath broad, on sterigmata which measure jth to zath long, and which are com- 
posed of short, roundish or oblong irregular cells. 
Specimen 7.—On basalt, near the Giant’s Causeway, County Antrim; Dr 
Moorg, in Herb. Carroll; no apothecia. The spermogones are plentiful; the 
spermatia about janth long, and sth broad. 
Specimen 8.—ScHAHRER exs. 350 (sub a. aipolia); on the bark of trees about 
Belp. The spermogones are of the papillar type, as is usual in the broad-lobed 
form of the plant. 
Specimen 9.—Hepp. exs. 4733; associated with Lecidea exilis; a form passing 
into var. tenella. The spermogones are distinct black cones, scattered in groups 
over the broadish lacinie. 
Specimen 10.—Var. tenella, Sch.; a variety characterised chiefly by the 
presence of marginal and terminal cilia, varying inlength. The lacinie are gene- 
rally narrow; convex above, occasionally almost sub-fistulose, with frequently 
bullose or sorediiferous extremities. With var. tenella, it appears to me that 
ScH2RER’s var. hispida should also be associated; at least, I know of no valid 
reason for dissociating them. In this variety, which has usually a very pale 
thallus, the spermogones are more abundant and distinct than in the ordinary 
type of the plant. Walls on the hills above Innerleithen, August 1855, W. L. L.; 
with apothecia. The centre of the thallus is abundantly sorediiferous. The sper- 
mogones are plentiful, and very distinct as prominent, elevated, roundish deep 
blackish-brown or black warts, in many of which the ostiole may be seen as a 
minute, round, or slightly irregular pore or foramen. The spermatia are rod- 
shaped, about sath long; the sterigmata very slender. Similar spermogones 
occur in specimens growing on walls at the Grange, Edinburgh, 1851, W. L. L. 
Specimen 11.—Var, tenella ; Blaeberry Hill, Perth; on trees and stones, plenti- 
ful; April 1856, W. L. L. The spermogones are plentiful on specimens destitute 
of apothecia; the ostiole is frequently distinct, usually triangular or stellate. On 
an old wall, Rossie Moor, Forfarshire; coll. Croat. Specimens bear both apo- 
thecia and spermogones. 
