228 DR LAUDER LINDSAY ON THE SPERMOGONES AND PYCNIDES 
W.L.L.; furfuraceous form, with narrow laciniz. The sterile, elongated, ramose 
filaments are here abundant in the spermogones; they usually have a distinctly 
bulging apex, and are frequently distinctly septate, like the paraphyses. 
Speciinen 5.—Storr Rock, Skye, August 1856, W. L. L.; with apothecia. The 
spermogones are here very distinct and characteristic; they are of a deep-brown 
colour, rather than black, however. 
Specimen 6.—On roadside walls, between Percy and the Spittal of Glenshee, 
Perthshire, August 1856, W. L. L. The spermogones are mostly old; in their in- 
terior, nothing is to be seen but the ramose, elongated filaments already described, 
which frequently assume a pale-brown colour at their tips; they are also distinctly 
septate. 
Specimen 7.—On rocks, near Ayton, Cleveland, Yorkshire, 1856, Mupp ; fur- 
furaceous form. The spermogones are abundantly scattered among the isidioid 
growths, which cover the ends of the laciniz. 
Specimen 8.—Croau’s Plants of Braemar, No. 389; on stones, common ; July 
1855. Furfuraceous form ; apothecia plentiful. Dotted over the smooth, shining, 
light-gray ends of the lacinice, are numerous punctiform spermogones,—so minute 
that they can with difficulty be seen even under the lens,—whose ostioles are 
sometimes slightly depressed, though generally flat. 
Specimen 9.—Connemara, Ireland, D. Moore; in Herb. Carroll; apparently 
growing on the ground; no apothecia. Spermogones occur only on one specimen ; 
they are mostly degenerate. The ostiole is seldom quite round, generally less or 
more irregular in outline, and frequently surrounded by a sort of raised, thalline, 
ring-like border. Intermixed, and scarcely distinguishable from these spermo- 
gones except by their slightly greater size, are black punctiform pycnides. The 
stylospores are very irregular in shape, though mostly spherical, oval, or pyriform, 
and frequently curved ; the sterigmata are short, simple, linear bodies. Pycnides 
having a similar site and external characters occur associated with the ordinary 
spermogones in a specimen of P. senwosa from Dunkerron, Ireland. I find no 
spermogones on specimens from Tasmania, Dr Hooker ; Quebec, SHEPHERD; and 
B. de Bigorre, Pyrenees, Spruce ;—all in Herb. Hooker. 
Specimen 10.—Var. sulcata. The Parmelia sulcata, Taylor, “Fl. Hib.” 145, seems 
to me undoubtedly referrible to P. saxatilis, and I therefore place it here as a 
variety, though I do not regard it even as a well-marked variety. It is merely a 
form of what is called var. leucochroa by WALLROTH, ScH4RER, and others of the 
earlier lichenologists, a variety distinguished by large lobes, smooth and white, and 
marked on the upper surface by distinct sulci or lacunee. It is common in Britain 
on trees ; seldom or never on rocks or stones. Van Dieman’s Land, Gunn; in Herb. 
Hooker, Kew. The spermogones are precisely those of P. saxatilis. Here they 
are few and large, scattered about the ends of the lacinize—the ostiole being some- 
times depressed, sometimes surrounded by a black ring or seated in the centre 
