LICHENS AND LICHEN. PARASITES

106 D.A.N.Z. LINTARCTIC EESEARCII EXPEDITION
about 4 X lP in a clavate mass of gel about 7 X llp; asci 50-55 X 0-lop, cylindric clavate, thinwalled,
8-spored ; ascospores hyaline, 2-celled, somewhat constricted at the relatively thick septum,
ellipsoidal, 12-15 X 5-6p.
On roclrs with Lecidea intersita, Rhizocarpon kergzbelense, Lecanora atrocaesia, Buellia subplicata
and B. tristit~scula.
Kergueleii: Greenland Harbour, B.A.N.Z.A.R.E. B177-38; Murray Island, B.A.N.Z.A.R.E.
B210-3.
Our material is very fragmentary and in poor condition for identification, but such characters
as are observable suggest the following species, whose descriptions are based on the types.
CATILLARIA CREMEA Dodge & Baker.
Catillaria crentea Dodge & Baker, Ann. Mo. Bot. Gard. 25, 544; 1938.
Type: Marie Byrd Land, Edsel Ford Range, Skua Gull Peak, P. Siple & S. Corey, 72W-8.
Assimilative thallus thinly diffused over 1 cm., slightly arachnoid to areolate and deeply
cracked, gelified when moist, white to cream colour, often rusty and discoloured from the substratum;
cortex poorly developed, sometimes with a few darker fastigiate cells appearing in the
craclrs and on the sides of the areoles, amorphous over the tops of the areoles; algal layer 65p
thick, cells protococcoid, up to 7p in diameter, in more or less spherical colonies; medulla of
loosely reticulate strands, basal cortex 50-75p thick, of more compact cells, darker brown, irregularly
arranged (not fastigiate).
Apothecia up to 0.35 mm. in diameter, irregular in outline, flattened, scattered, immarginate,
sometimes slightly concave, sessile on the areoles, black; parathecium up to 50p thick, carbonaceous,
merging with the hypothecium which is up to 75p thick, light to dark brown and carbonaceous
; thecium about 50p tall ; paraphyses 0 ~75-1 -0p, expanding to 1 -5-2. 5p at the heads,
mostly unbranched, somewhat flexuous, slender, epithecium about lop thick, dark; asci
31-37 X 12-15p, short and broadly clavate, especially when mature, 8-spored ; sscospores fasciculatly
arranged, 11-14 X 34p, uniseptate, slender-ellipsoidal with truncate ends.
MacRobertson Land, Cape Bruce, 67" 26' S., 60" 40' E., B.A.N.Z.A.R.E. B108-6.
CATILLARIA noccosA Dodge & Baker
Catillariu floccosa Dodge & Baker, Ann. Mo. Bot. Gard., 25, 545 ; 1038.
Type: Marie Byrd Land, Edsel Ford Range, Skua Gull Peak, P. Siple & S. Corey 72W-2.
Assimilative portions well developed covering areas of several square centimetres,. floccose to
calcareous when dry, gelified and pustular when moist, white to greenish from the abundance of
included algae; cortex evanescent, represented by groups of dark, fastigiate cells, variable in size,
scattered over individual pustules; algal layer about 15OP thick, of scattered colonies, cells 6-7p
in diameter; medulla up to 300u thick, of very slender hyphae, very loosely woven, more compact
about the algal colonies; basal layer identical with the scattered dark cortical cells but continuous,
about 15p thick. Cephalodia with Nostoc abundant under the basal layer.
Apothecia up to 0.35 mm. in diameter, usually about 0.20 mm., sessile covering the pillars of
the assimilative portions, irregular, convex, scattered, black, shining; parathecium 10-12p thick,
black; hypothecium up to 20p thick, of dark, compact cells, more or less reticulately arranged;
thecium 50-70p talli paraphyses 1.5-2p in diameter, of short, brownish cells, tips scarcely
enlarged, epithecium 4-5p thick, dark; asci 29-48 X 12-16p, 8-spored, tip thickened; ascospores
11.5-15 X 3.5-6.5p, uniseptate, not constricted, one cell usually obtuse, the other more acute.
King George V Land : Cape Denison, D. Mawson 1051, A.A.E.