380 - DR. LINDSAY ON THE SPERMOGONES AND 
maturescence 1-3-septate, being normally 3-septate in maturity. Their usual size is 
soso X radoo- Their colour is olive green of various shades, becoming brown with age. 
In the mature state they are oblong, with rounded ends, passing from oval or pyriform 
through ellipsoid-oblong, their outline being frequently in addition irregular. In stages 
intermediate between youth and maturity the loculi form 1-4 spherical nuclei (some- 
times of unequal size) about 3555 long. These peculiar stylospores, when mature, fre- 
quently resemble, though on a smaller scale, the sporidia of Lecidea alboatra. The 
basidia are very short, simple, filiform, and very inconspicuous. The pycnides above 
described have all the characters that would have placed them, only a few years ago, in 
the now obsolete genus Pyrenothea among lichens, or in the genus Septoria among 
fungi. 
odd 2. Woods about Berne, Switzerland: Scher. Exs. No. 16, sub 4. vulgaris, 
var. astroidea; associated with Verrucaria epidermidis. The spermogones are small, 
black, punctiform conceptacles, scattered among the apothecia. Spermatia oval or 
spherical, atomic in size, on very short, linear, simple sterigmata. Cavity simple; enve- 
lope of deep-brown cellular tissue. 
Specimen 3. Var. Swartziana, Ach. Malham, Yorkshire : Dr. Carrington. Spermo- 
gones are minute, brown, punctiform, containing spermatia about 44355 long when fully 
formed; some straight, others curved or twisted; many of them in segments. Sterig- 
mata simple. 
Specimen 4. Var. Swartziana. On tree-barks about Cork : Carroll, March 1858. Out- 
side of those parts of the thallus occupied by apothecia are scattered numerous very 
minute, brown, punctiform spermogones, scarcely visible even under the lens after mois- 
ture. The constituent internal tissues are also so minute as to be scarcely distinguishable 
under power 380 of Nachet's microscope. They are simple, spherical vesicles, full of 
atomic spermatia, given off by very short, simple sterigmata. 
Specimen 5. Var. Swartziana. On trees, Yester House, Haddingtonshire, July 1856: 
Dr. Murray Lindsay. Accompanying spermogones and spermatia of the type are pyc- 
nides, containing stylospores that are oblong, linear or ellipsoid, straight or slightly curved, 
simple or sometimes with two polar nuclei. Basal cellular tissue, the matrix of the 
basidia, brown *. 
Species 2. A. CINEREO-PRUINOSA, Sch. (Nyl. Prodr. p. 165). 
Specimen 1. On Pinus picea, Mount Gurnigel, Switzerland: Scher. Exs. No. 251, 
sub A. biformis. A few lirellæ of Opegrapha vulgata are associated. The plant does not 
appear to me properly separable from A. impolita. The sporidia are essentially the same. 
Two forms of spermogone occur. In the first the conceptacle is small, black, conoid or 
tuberculiform, containing linear spermatia, about 3455 X 55-450 With rounded ends, 
straight or slightly curved, on longish, simple sterigmata, which, with the spermatia 
attached, are sickle-like. These spermatia and sterigmata thus resemble those of Ope- 
grapha vulgata, to which they may here be really referable, though the spermogones con- 
* Vide also description and figures of pyenides and spermogones of this species in my paper on Arth. melaspermella, 
p. 272, and plate vi. figs. 9, 10, 11. 
