LICHENS AND LICHEN. PARASITES

DODGE--LICHEN8 AND LICHEN PARABITE8 211
the Paris specimen] ; cortex 40p thick, outer layer a gel 8-15p thick, below which is a palisade of
dichotomously branched, brownish hyphae, 3/~ in diameter, very dense above, looser below and
passing directly into the medulla without algae; medulla up to 200p thick, arachnoid, hyphae 3;~
in diameter, heavily incrusted with crystals, passing indistinctly be!ow into the chondroid axis
which is 1,250p in diameter, lacerate about the margin with cortex nearly lacking over the
lacerations, the whole lacuna filled with algae with a narrow medullar strand in the centre, connected
with the ecorticate area to provide aeration ; algal cells arranged in rows, forming a palisade
next the cortex, with more spherical colonies scattered in the medullary tissue, cells 4 X 'ip,
angular; hyphae of axis with lumen about lp in diameter ; central cavity brownish, nearly devoid
of algae, asteroid, sth3 with loosely woven hyphae ,&7p in diameter, with lumina lers than 1;~;
no reaction with paraphenylene diamine nor K.
Apothecia abundant on the largedalks, lateral near the tip of a branch, the end of the branch
then bent back and often inconspicuous, up to 20 mm. mostly about 10 mm. in diameter, irregu-
1
larly lobed, disc black, shining, slightly rugose; exciple smooth [except one plant minutely verrucose
as in the stem immediately below], concolorous with the thallus but not maculate even in old
moribund apothecia; cortex 85r thick, fastigiate as in the thallus, without the outer layer of gel;
algal layer continuous, 60-70p thick. cells subspherical 6-7~t in diameter with sheaths 3p thick;
medulla 140p thick, of loosely periclinal hyphae, 4-6p in diameter with very narrow lumina; hypothecium
85p thick, of very slender, densely woven hyphae, more or less periclinal; thecium about
80p tall ; paraphyses slender, fastigiately dichotomously branched above, forming a greenish black
epithecium about 15p thick; asci clavate, thick-walled, 8-spored, 56 X 15p; ascospores short ellipsoidal,
hyaline, relatively thick-walled, 10 Y 5-6p.
Spermogonia immemed in black, irregular swellings, oblately sphaeroidal, 185p tall, 250~ in
diameter, wall thin, hyaline, 20p thick, of slender, periclinal hyphae about 1 .5~ in diameter, easily
separable from the snrrounding tissues ; spennatiophores closely septate and branched ; spermatia
3 X lp, ,dlipsoidal, straight.
'l'hh: above description is based on the type. The B.A.N.Z.A.R.E. material is mustard yellow
'
and more blackened with much smaller apothccia.
Kerguelen : Christmas Harbour, J. D. Hooker (Voy. " Erebus & Terror") type in Taylor 'Herb.
and dnplicate ex Ilerb. Taylor in Tuclrerman Herb.; Mountain, 1,500 ft. above Port Jeanne d'Arc,
R.A.N.Z.A.R.E. B176 ; locality not given, Moseley (" Challenger" Exp.) in Stirton Herb. at the
' Art Galleries, Glasgow.
TJSNEA INWLARIS (Lamb) Dodge, n. comb.
Neuropogon insu!aris Lamb, Jour. Linn. Soc. Bot., 52, 215; pl. 8, fig. 17; 1939.
Type : Prince Edward Group, Marion Island, 46" 49' S., 37" 49' E., Moseley ("Challenger"
Exp.), not seen.
Thallus erect, spreading, 5 cm. tall, forming hemi~phcric t~~fts, rigid, base 4 mm. in diameter,
repeatedly branched just above the base, primary branches about 2 mm. in diameter, dichotomous
above, divergent, ascending, ultimate branches short, tips obtuse, without true ramnli, terete,
smooth, subnitid, some of the larger branches rugose to subfoveolate. ultimate branches black maculate
or black annulate but not cracked, tips black, rest hazel to cinnarnol~ rufous, with lighter, somewhat
irregnlar patches over the young soralia which are slightly elevated, more or less circular aiid
confluent, plane to slightly eroded, naphthalene yellow ; cortex 55-90p thick, K fuscescent, thinning
over the future soralia, a palisade of thick-ralled Ayaline hyphae, without crystals; algal layer
and medillla often laclring over a portiol~ of the older branches, where present about 90p thiclr,