LICHENS AND LICHEN. PARASITES

DODGE-LIUHENS AND LICHEN PARASITES 109
Laseroni, cortex abont 20p thick, highly gelified, appareiitly of pel.icliiia! hyphae ; algae in spheri-
cal colonies, abont 35-55p in diameter, occasionally confluent, of densely packed cells, abont 8p in
diameter, protococcoid; mednlla of strands of densely woven, slender hyphae; no lower cortex
seen.
Apothecia abont 0.15 mm in diameter, stipitate, stipe about 75p in diameter and abont the
same height, with scattered algal colonies which do not penetrate the apothecium groper, disc very
convex, inmarginate, dark rnfons, blackening; parathecinm absent or at least not differentiated
from the paraphyses; hppothecinm abont 90p thick, not difl'erentiated frcnl the mednllary hyphae
of the stipe; thecinm 75p tall; paraphyses 2-3p in diameter, abont thrice dichotomons in thc
npper portion, tips not inflated, ending in the epithecial gel which is abont lop thick; asci clavate
at first, then expanding above as the spores develop in the upper half, abont 35 X 8-lop; aseo-
spores snbfnsiform, hyaline, 4-celled, ends rounded, fascicnlately disposed in the ascns, about
15 X 3p.
Only three small groups of apothecia seen.
King George V. Land, Madigan Nnnatak, 2,400 ft., 30 mile? east of Winter Qnarters, C. F.
Laseron, A.A.E. 2.
BACIDIA (EUBACIDIA) HARRISSONI Dodge, sp. nov.
Type : Qneen 'Mary Land, Mt. Barr-Smith, ca. 4,000 ft., C. T. I-Iarrisson, A.A.E. 75-1.
Thallns 1-2 mm. diametro, continuns, superficie minnte granulosa, albns ; cortex non bene distinctus
; stratum algarnm 200p crassitudine, coloniis subsphaericis, cellnlis protococcoideis, 5-6p
diametro ; medulla hyphis ramosis laxe contexta. Apothecia convexa, nigra, 0 1-0 5 mm. basi
constricts, sessilia, ant breviter stipitata; paratheeium 125p crassitndine, cortice 50p, fastigiate
hyphis bis dichotomis, mednlla 75p medullae thalli similis sed compactins eontexta; hypothecium
circiter 20u crassitndine, hyphis subverticalibns non bene distinctum ; thecium 50p altitndine ; paraphyses
tennes, septatae, repetito-dichotomae super ascos, ramis nltimis moniliformibus, non incrassntis;
asci cylindrici vel subclavati, apicibus incrassatis, 25 X lop; ascosporae acicula~es,
hyaline, mnltiseptatae, 22-25 X 2-2.5p, subcurvatae in ascis sed non contortae.
Thallne 1-2 mm. in diameter, conthuous, surface ininutely granular, white ; cortex scarcely
differentiated from the medulla; algal layer about 200p thick of subspherical colonies, with
smaller ones deep in the medulla, eells protococcoid, 5-6p in diameter, not closely packed, extending
under the apothecinm ; medulla of loosely woven, branched hyphae in a gel.
Apothecia convex, black, 0.1-0.5 mm., constricted at the base, sessile, or short stipitate; parathecium
consisting of a cortex about 50p thick, fastigiate, of widely spaced, twice dichotomous
hyphae in a gel and a medulla 75r. thick, similar in structnre to that of the thalline medulla but
more closely woven; hypothecium about 20p thick, of vertical hyphae not well differentiated from
the thecium but more deeply staining; thecium 50p tall; paraphyses slender, septate, repeatedly
dichotomous in the upper portion, ultimate branches moniliform, not enlarged, imbedded in the
brownish epithecial gel; asci cylindric to slightly clavate, tip thickened, end of protoplast round,
25 X lop; ascospores acicnlar, hyaiine, m~~ltiseptate, 22-25 X 2-2.5p snmewhat cnrved, especially
in the ascns, but not contorted.
Qaeen Mary Land : Mt. Barr Smith, ca. 4,000 ft., A.A.E. 75-1.
BACIDIA JOHNSTONI Dodge, sp. nov.
Type: King George V Land, Cape Denison, B.A.N.Z.A.R.E. B536-6.
Thallus albus, granulosus, vel subsquamnlosus ; cortex circiter 15p crassitudine, densius con-
textus, partim decompositus, ab hyphis rnedullaribus non aliter distinctus; stratnm algarum ad
loop crassitndine, aellnlis protococcoideis, sinellis, sphaericis vel subangulosis, ca. lop diametro;