262 DR. LINDSAY ON THE SPERMOGONES AND 
These spermogones differ both. externally and internally from those described as 
belonging to this species by Mudd; nor do their characters agree with those assigned to 
the spermogones of his Bilimbia anomala, Ach. (p. 187), which, he says, is often con- 
founded with L. Griffithii, and which he separates, apparently mainly on account of the 
very different spermatia in the two species here contrasted. Both Griffithii and anomala, 
however, are rather to be regarded as belonging to a single, very protean and compre- 
hensive type, whose apothecia and sporidia, spermogones and spermatia, pycnides and 
stylospores, are polymorphous and puzzling in the extreme, by reason of their wonderful 
variability. 
Specimen 2. On birch, Fritton wood, 1805: Borrer; in the Kew herb. The sper- 
mogones have here, again, the peculiar character of those of L. Ehrhartiana, though they 
are neither so large nor so irregular in surface. "They are scattered among the apothecia, 
perched on papillar elevations of the thallus, to the buff colour of which they form a 
striking contrast. They are abundant, black, irregular, flattened, and subdiscoid, con- 
taining ellipsoid spermatia, 5565 X 50-000 on very short, simple sterigmata, about 
50600 — 6000 long. Projecting from among and beyond the ordinary sterigmata, es- 
pecially in the old state of the spermogone, are ramose, delicate filaments, about 545 
zoo long. | 
Specimen 3. On rails, Caistor, 1805, in Kew herb., fastened on the same sheet with 
Lecanora badia, Ach. The thallus is buff-coloured, very rugged, thick and tartareous. 
The apothecia are large, convex, and irregular; the sporidia ellipsoid, 1-septate, colourless, 
5000 X 5000. Here the spermogones are immersed—the ostiole being deep-brown, 
roundish or irregular, flattened, distinct. The spermatia are ellipsoid, soyo X 15-450» 
on ramose sterigmata with linear segments, about 1555 — 1359 X r500: 
Specimen 4. Gopsall, Leicestershire: Leight. Exs. No. 60, sub Biatora Griffithii, Sm. 
The spermogones are scattered among the young apothecia as small, black, round, irre- 
gular, sometimes flattened or subdiscoid bodies, generally inconspicuous, occasionally 
subprominent, and sometimes with a subdistinct, raised, thalline border. 
The lower specimen in my copy consists wholly of spermogones of quite a different 
character, referable possibly to a different species, or to a different variety or form of 
L. Griffith. They are here numerous, very minute, black, immersed and punctiform, 
scattered over the whitish, indistinct, filmy thallus. The spermatia are numerous, 
thickish, rod-shaped, 5555 long; the sterigmata delicate and linear, resembling those of 
Ramalina, about 1355 long, sometimes apparently composed of a few linear articulations, 
or branching at the base. 
Specimen 5. On ash trees about Belp, Switzerland : Scher. Exs. No. 473, sub ZL. ano- 
mala, var. cyrtella. On the left-hand side of the specimen in my copy the spermogones 
are small thalline warts, scattered about the apothecia, each tipped with a minute, brown; 
punctiform ostiole. The spermatia are very abundant, large and distinct, crescentic, 
3369 X 56:000 on simple linear sterigmata 541 long. The basal cellular tissue is 
brown. 
On the right-hand side of specimen, spermogones are also numerous as minute, brown, 
grain-like, scattered conceptacles, superficial, distinctly circumscribed, having an enve- 
