LICHENS AND LICHEN. PARASITES

DODGE--LICHEN8 AND LIUHEN PARASITEB 141
in diameter, 125p tall, wall dark brown, lop thick, inner portion folded to form a labyrinthine cavity
at maturity; spermatiophores 15-1gp long, very slender, cutting off 'bacilliform spermatia
5-6 X 0.5~.
Our Macquarie Island material agrees well with this species 'but the apothecia are very
immature.
Macquarie Tsland : Highlands, B.A.N.Z.A.R.E. 534-6.
STI~EOCAUDDN LASERQNI Dodge, sp. nov.
Type: George V Land, Nadigan Nunatalr, ca. 2,400 ft., 30 miles east of Winter Quarters,
C. F. Laseron, A.A.E. 25-3.
Podetia cribrosa, subtomentosa, 4-5 mm. altitudine subapplanata, ramis teretibus, 0.2--0.5 mm.
diametro, corymbis apotheciorum 0.3 mm. diametro terminatis; phyllocladia verrucis parvis in
ramis fertilibus reducta, olivacea ; cortex verus non evolutus; algae protococcoideae, 7-8p diametro,
pachydermeae; hyphae medullares ca. 3p diametro, pachydermeae; hyphae chondroideae, 4-5p
diametro pachydermeae, conglutinatae, centre parallelae, sub medulla hypothecioque laxius con-
textae. Apothecia convexa, hemisphericave, ca. 0.3 mm. diametro, concrescentia, vinaceo-
cinnemomea, mox nigricantia; amphithecium deest; parathecium 18-20p crassitudine, hyphis
periclinalibus subbrunneis, 2-3p diametro, ex hyphis medullaribus oriundis et sub hypothecio
parathecium deest; hypothecium 40-50p crassitudine, hyphis subverticalibus, hyalinis, ex hyphis
chondroideis oriundis ; thecium 36-40p altitudine ; paraphyses tenues, apicibus ramosi, epithecio
hyalino dein obscure brunneo ut apothecium nigrescit; asci clavati, primum protoplasto sub-
truncato 3640 X 7-8p; ascosporae hyalinae. 8-loculares, rectae vel leviter curvatae, fasciculatim
dispositae, 16-18 X 2p.
Thallus compact masses, 4-5 mm. tall, of flattened, ascending, cribrose, subtomentose, warm
buff podetia, with marginal round branches, 0.2-0-5 mm. in diameter, ending in short corymbs of
apothecia about 0.3 mm. in diameter ; &yllocladia reduced to small verrucae on the fertile branches,
dark olive buff or darker; cortex reduced to the medullary hyphae which surround the algal cells
in the verrucae; algae protococcoid, 7-8p in diameter, with conspicuoudy thickened walls;
medullary hyphae about 3p in diameter, with moderately thickened walls; chondroid hyphae,
4-5p in diameter, thick-walled, conglutinate, parallel in the centre, more loosely woven next the
medulla and under the hypothecium.
Apothecia convex to hempisheric, about 0.3 mm. in diameter, sometimes concrescent,
vinaceous, cinnamon, soon darkening to black ; amphithecium absent ; parathecium 18-20p thick, of
periclinal, slightly brownish hyphae 2-3cr in diameter, springing from the medullary hyphae and
not continued under the hypothecium; hypothecium 40-SOP thick, of compact, subvertical hyphae
arising from the chondroid hyphae, hyaline ; thecium 3640p tall ; paraphyses slender, branched
near the tips, epithecium hyaline becoming dark brown as the apothecium blackens; asci clavate,
wall moderately thickened, protoplast somewhat truncate above at first, 36-40 X 7-8p ; sscospores
hyaline, about 8-celled, straight or slightly curved, fasciculately arranged, 16-18 X 3p.
In habit and microscopic characters of the thallus, this species is suggestive of the sterile
Alectoria covymbosa Hue. Apparently growing on a disintegrating, reddish granite or quartz,
but mostly scraped from the surface of the rock. In habit it is also suggestive of Naophyllis
Wilson from Australia and Cfymnoderma Nyl. from the Himalayas, from 50th of which it differs
in the spores.
George V Land, Madigan Nunatak, ca. 2,40Oft., 30 miles east of Winter Quarters, C. F. Laseron
A.A.E. 2, 25-3 ; Cape Denison, B.A.N.Z.A.R.E. 536-12.
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