SCHIZOMA| EPHEBACEX! 33 
somewhat prominent, spermatia minute, cylindrical, slightly 
wider at the ends, acrogenous on sparingly branched sterigmata. 
The genus is placed along with others containing Scytonema, 
though the systematic position is uncertain so long as the fructifica- 
tion is unknown. The Scytonema filaments are occasionally intact 
towards the centre of the thallus; as a rule they are broken up into 
groups, as in the genus Heppia. They are massed under the cortex, 
and the medulla is formed of crowded thin-walled branching hyphe, 
mostly parallel with the long axis. 
1. §. lichenodeum Nyl. ex Cromb. in Grevillea v. p. 108 
(1877).—Thallus of ligulate cylindrical-angular dichotomously 
branched lobes flattened when dry and canaliculate, about 
5-10 mm. in length and about $ mm. wide, occasionally sprinkled 
with isidiose granules dark-brown. Apothecia not yet seen.— 
Collema lichenodeum Nyl. ex Carroll in Journ. Bot. iii. p. 287 
(1865) ; Cromb. Lich. Brit. p. 3; Leight. Lich. Fl. p. 18; ed. 3, 
p- 15; Cromb. in Journ. Bot. xii. p. 332 (1874). 
Confusion has arisen in the rendering of the specific name, but 
Carroll’s is the first published. The fronds bear a considerable 
resemblance to those of Lichina. 
Hab. On decayed mosses and on the ground in crevices of rocks in 
alpine places.—&. W. Summit of Ben Lawers (the only locality). 
14, SPILONEMA Bornet in Mém. Soc. Sci. Nat. Cherb. iv. 
p. 226 (1856). (Pl. 14.) 
Thallus minutely shrubby with branching filaments. Algal 
cells Stigonema, in rows of several series of cells. Apothecia 
small, lenticular ; paraphyses usually thickish, septate ; spores 
simple or l-septate, colourless. Spermogones like small tubercles, 
the sterigmata septate with pleurogenous oblong spermatia. 
The thallus is well distinguished from the preceding genera by the 
algal constituent. As in the genus Thermutis, many of the fila- 
ments of the various species are algoid in our specimens. 
1. §. paradoxum Bornet 1. c. tt. 1 & 2.—Thallus dark-brown 
or brownish-black, of slender cylindrical branches, intricate and 
felted, the secondary branchlets generally unilateral. Apothecia 
small, terminal on the main stalks, hemispherical, black ; hypo- 
thecium dark-coloured ; paraphyses clavate ; asci clavate, arising 
from the lowest cell of a paraphysis ; spores oblong-ellipsoid, 
simple, 9 » long, 4 » thick; hymenial gelatine deep-blue, then 
dark-violet with iodine.-—Mudd Man. p. 35; Leight. in Ann. 
Mag. Nat. Hist. ser. 3, xvi. p. 9, t. 4, tigs. 7-11 (1865) & Lich. 
Fl. p. 11; ed. 3, p. 10; Cromb. Lich. Brit. p. 1 & in Journ. Bot. 
xii. p. 331 (1874). 
Exsice. Leight. n. 347. 
The thallus bears a considerable resemblance to that of the more 
common Hphebe pubescens, but it is altogether smaller, and the 
fructification is different. I 
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