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80 B.A.N.Z. ANTARCTIC RESEARCH EXPEDITION<br />
linear lobes 3 mm. wide and large, black, marginal apothecia abont 3 mm. in diameter. This is so<br />
aberrant from the othrr members that we cau disregard it in selecting the type. Perhaps it is<br />
S. homseophylla Nyl. Hooker & Taylor note that the specimens from the Falkland Islands have<br />
very wide lobes, and since they consider these specimens aberrant, we can eliminate them,<br />
although they happen to be the oiily ones studied by Muller-Argan i11 1887 who referred them to<br />
S. Freycinetii. No. 1307 [or 13171 from Van Diemen's Land (= Tasmania) is aberrant from all<br />
the others in having a scrobicnlate thallns and much shallower lobing (cf. S. psi!ophylla Miill.-<br />
Arg.). The spccimen collected by J. D. Hooker Ang. 24, 1840 in Van Diemen's Land is very<br />
close to 8. Delisea as figured by Delise from the type in King Island. The specimens collected bj-<br />
Gunn from Tasmania are rather poor and ambiguous but apparently arc S. L)alisea, referred by<br />
Muller-Argan to S. Freycinetii var. prolifcra Mull.-Arg. Miiller-Argau refers the Cape Horn<br />
material to 8. Freycinelii var. f~dvo-cinerea (Mont.) Nyl. This leaves a residue of specimens<br />
from Lord Auckland's group and Campbell Island which are fairly uniform in appearance. Of<br />
these, that "from Lord Auclrland's group, J. D. Hooker [Nov. 20-Dec. 12, 1840, sent Taylor in]<br />
1844" may be considered the type as it is the best developed and most fertile. The following description<br />
is based on thc broader specimen with notes on two specimens from Campbell Island.<br />
Our material from Macquarie Island has the measurements of the material from Campbell<br />
Island. R. Freycinetii var. glabrescens was based on duplicate collections from Auckland and<br />
Campbell Islands, J. D. Hooker (not the specimens in Taylor's herbarium) and a specimen froni<br />
New Zealand, Lyall.<br />
Thallus large, lobes very irregnlar, rounded, margins crisped, smooth or crenulate, sometimes<br />
minutely so and appearing lacerate, (much less so than in S. Delisea) surface glabrous,<br />
smooth or slightly rugose, drying chamois, tinged orange cinnamon to warm sepia, very fragile,<br />
proliferating from broken edges and occasionally the margins, as flat isidioid lobules or as continuous<br />
bands of small soredia (while i11 P. Delisea the isidia are more terete and coralloid) ;<br />
below black in the centre, shading to cinnamon at the margins and tips; pseudocyphellae<br />
prominent, white, of medium size; upper cortex 25p thick, of irregular thin-walled pseudoparenchyma,<br />
cells abont 7-8~ in diameter; outer cells forming a tomentum at least under the<br />
apothecia; algal layer 3510p thick, protococcoid, cells 8-lop in diameter; medulla about 100p<br />
thick, of loosely woven, more or less periclinal, thin-walled hyphae about 34p in diameter; lower<br />
cortex about 40-50~ thiclr, of brown, thick-walled, more or less periclinal pseudoparenchyma, cells<br />
7-8p in diameter, the outer layer very dark brown, giving rise to tufts and scattered septate rhizinae,<br />
5-6p in diameter, cells 8-llP long.<br />
Apothecia 3.54 mm. in diameter, disc concave, chestnut, exciple minutely tomentose, hairs<br />
short; amphithecial cortex about 65p thick, of irregular pseudoparenchyma, protoplasts 7-8p in<br />
diameter, outermost growing out as a fine short tomentum; algal layer 15-20~ thick, not well<br />
developed ; medulla continuous with that of the thallus and of the same texture ; parathecinm<br />
blbownish, 3540~ thick, of densely woven periclinal hyphae; hypothecium not differentiated;<br />
thecium 80-90p tall ; paraphyses slender, septate, tips slightly clavate, epithecial. gel not well<br />
developed nor coloured; asci cylindric, 55 X 35p; ascospores hyaKne, two-celled, ellipsoid,<br />
20-22 X 7-8p, apices obtuse.<br />
Spermogonia 8 5 tall, ~ 120p in diameter, wall not well dereloped; spermatiophores typical,<br />
spermatia ellipsoid, 1.5 X 2p [in material from Campbell Island in Clinton Herb.].<br />
The material from Campbell Island agrees well with the above, but the thallus is somewhat<br />
thicker and all dimensions larger, e.g. upper cortex 354Op thick ; algal layer 35-40p ; medulIa<br />
140-15OP, lower cortex 3540p.<br />
Lord hnckland Group : J. D. Hookcr (Vov. " Erebns & Terror ") in Taylor Herb., type.
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