DR. LINDSAY ON NEW-ZEALAND LICHENS. 499 
ragged, from irregular submarginal erosions or perforations; at other times their 
margins are fringed with squamulose growths. The general colour is dirty brown, some- 
times lurid ; occasionally there is a greenish hue, one which can be produced artificially 
at any time by steeping herbarium specimens in water. By destruction, in irregular 
patches, of the cortical layer, the subjacent white medullary tissue is occasionally ex- 
posed. The thallus is liable to be infested with a parasitic Celidium*. 
2, Specimen in my herbarium, sent me by Dr. Müller of Melbourne, labelled only 
“New Zealand," probably from the Wellington district: in fruit and spermogoniferous 
(ig.2). Spores brown, 1- to 3-septate; the former in the young, the latter in the old 
state; more oval-ellipsoid and with more rounded ends than in my Otago specimens ; 
0008” to 0009” long, and :0004” broad. Thecæ :0030” long, 0006” broad. Paraphyses 
agglutinated at their tips, which are sometimes obscured in the older apothecia by a 
considerable amount of granular brown colouring-matter. 
Spermogones are best seen on the ruge which occur towards the tips of the thalline 
laciniæ, beyond the region occupied by the apothecia ; they are extremely minute, brown, 
and punctiform, as seen on the thalline surface; but the body is immersed as a solid and 
comparatively large, hard, whitish kernel, easily enucleated. 
A. Var. Richardii, Mont. (Fig.8). Sticta Richardii, Bab. L. N. Z.18. [Linds. Mem. 
Spermog. 197. | 
3. On trees, East Taeri bush, Otago, N. Z.: W.L.L.: in fruit, and spermogoniferous. 
Spores have the characters of the type, broadly ellipsoid, 1-septate, in young state 
sometimes polari-bilocular (a), with a connecting longitudinal tubule, olive or brown 
according to age, 0006” to 0009” long, and +0003” to :00045^ broad. Thecæ :0024 to 
0030” long, and -0006” broad. Paraphyses subdiscrete, with very dark-brown tubercu- 
liform heads. Hymenium (including thecæ) gives a beautiful blue with iodine. Apo- 
thecia large and sparingly scattered, marginal. Spermogones seated on the thalline 
ruge, abundant and very distinct, punctiform, deep brown or blackish. Thallus large 
and handsome, sometimes 6 to 8 inches across; colour varies from grey or glaucous to 
buff or lurid, greenish or olive: occasionally it is covered with a slate-coloured or black- 
ish bloom; rug: and fossæ enerally very prominent. ‚ge 
4. Pein: Dr. os in my herbarium: in fruit and — 2. 
Mogones partly old and degenerate, irregularly stellate, deep brown. Corti — 
us frequently eroded, exposing subjacent green gonidia and white medullary tissue. 
B. Var. linearis, Hook. & Tayl. 
3 On trees, East Taeri bush, Otago, 
res mn. 
pores and thecæ have the characters 0 yP lits parts; but it passes, E 
plant differs only in its size, being smaller in al 
epti : say ith few fosse or ruge. 
“ptible gradations, into both. Thallus comparatively smooth, with te 
i i iferous. 
N.Z.: W.L.L.: in fruit, and spermogon 
à and of var. Richardii. From these 
* li ! | » Trans. Royal Soc. Edin. p. 449, plate xxx. 
Linds. * Observations on New Lichens and Fungi from Otago, N. Z^ Trans. 10y 
figs, 48, 49, 91, 59. 
