34 CYCLOCARPINEX [SPILONEMA 
Hah. On rocks in maritime and subalpine districts.—Dzistr. Rare 
in N. Wales and §.W. Highlands of Scotland.—B. M. Barmouth, 
Merioneth; Barcaldine, Argyll. 
2. §. revertens Nyl. in Flora xlviii. p. 601 (1865).—Thallus 
of branching filaments, occurring in small compact agglutinate 
black or brownish-black pulvinuli. Apothecia adnate, slightly 
convex, immarginate, black, dark-greyish within ; hypothecium 
not dark-coloured ; paraphyses stoutish, somewhat thicker and 
blackened at the apices ; spores colourless, oblong, simple, 8-11 » 
long, 5-6 » thick ; hymenial gelatine bluish, the tips of the asci 
deep-blue, with iodine.—Cromb. in Journ. Bot. xii. p. 331 (1874) ; 
Leight. Lich. Fl. ed. 3, p. 11. 
Differs from S. paradoxwm in the small compact growth of the 
thallus. In the only British specimen the apothecia are but sparingly 
present, too few for examination, as are also the spermogones, stated 
by Crombie (Monogr. i. p. 21) to be globose, immersed and colourless, 
with somewhat curved spermatia. 
Hab. On moist rocks in subalpine districts.—B. M. Craig Tulloch, 
Blair Athole, Perthshire. 
3. §. scoticum Nyl. in Flora lii. p. 82 (1869).—Thallus 
minutely branched, in small compact somewhat convex agglu- 
tinate black or brownish-black pulvinuli. Apothecia minute, 
black, thinly margined, the disc slightly convex ; hypothecium 
colourless ; paraphyses somewhat slender ; spores ovoid-oblong, 
l-septate, 10-14 » long, 4-5 » thick; hymenial gelatine bluish, 
the asci violet, with iodine—Cromb. in Journ. Bot. vii. p. 105 
(1869) & Lich. Brit. p. 1; Leight. Lich. Fl. p. 12; ed. 3, p. 11. 
Very similar to the preceding in the form of the thallus, but 
distinguished by the internal characters of the apothecia. The latter 
are very rare. 
Hab. On rocks and on dead mosses (also on Stereocaulon con- 
densatum) in subalpine regions.—Distr. Rare, though perhaps over- 
looked, in N. Wales, N. England and the 8. Grampians, Scotland.— 
B. M. Llyn Aran, Dolgelly, Merioneth; Teesdale, Durham; Ben 
Lawers and Craig Calliach, Perthshire. 
15. EPHEBE Fr. Syst. Orb. Veg. i. p. 256 (1825) emend. ; 
Nyl. in Flora lvii. p. 6 (1875). | Girardia 8. F. Gray Nat. Arr. 
i, p. 287 (1821) pro parte. (Pl. 15.) 
Thallus filamentous, in spreading tufts, branched and intricate, 
without a cellular cortex. Algal cells Stigonema, the lichen 
hyphe external to the alga in young stages, forming central 
strands in the older branches, Apothecia minute, solitary or 
aggregate, immersed in swollen portions of the filamentous 
thallus ; paraphyses none ; spores simple or 1—3-septate ; spermo- 
gones with long sterigmata and short cylindrical acrogenous 
spermatia. 
