LICHENS AND LICHEN. PARASITES

254 B.A.N.Z. ANTARCTIC RESEARCH EXPEDITION
Apothecia up to 0.6 mm. in diameter, flattened to almost spherical, sometimes marginate,
sessile to substipitate, scattered to gregarious, black ; parathecium pseudoparenchymatous about
2OP thick on the sides of the thecium becoming about 5OP thiclr below ; hypothecium not well
differentiated; thecium up to 8OP tall; paraphyses 1-5-2r. in diameter, branched, heads in a group
of 7-8, suggesting a candelabrum, individual heads about 5p in diameter, walls darlrelled, with a
brown cap, epithecium up to lop thick, dark brown, rough; asci 31-50 (-57) X 11-15 (-17)r.,
8-spored, clavate, wall thick ; ascospores 2-locular, not constricted at the septum, ends acute, nearly
distichous when young, irregularly arranged when mature, 11-15 (-17) X 4-5.7r..
Our material differs from that from King Edward VII Land and Marie Byrd Land in having
somewhat larger apothecia and thicker assimilative areoles, up to 18OP thiclr with a single dark
brown rhizinal hypha attaching the areole to the dead most below. Numerous minute colonier, of
Nostoc are found in the moss, but without apparent connection to the lichen thallus. A.A.E. 36
with very old proliferating apothecia and bulbils is intimately associated with Alectoria congesta.
A.A.E. 61 is intimately associated with the thallus of Parmelia leucoblephara, also growing over
dead moss but I have been unable to decide whether it is epiphytic or parasitic. A.A.E. 12 is
parasitized by Orbicula Buelliae.
Queen Mary Land : David Island, C. T. Harrisson, A.A.E. 56-3 ; Possesion Nunatalr, C. T.
I-Iarrisson, A.A.E. 12, 36, 61.
BUELLIA PO~ARPA Dodge, sp. nov.
Type: Queen Mary Land, Possession Nunatak, C. T. Harrisson, A.A.E. 76.
Thallus hyphis obscure bruniieis in funiculos reticulatos aut radiantes; areolae assimilantes
ad 0.7 mm. diametro, irregulares, planae, albidre, sparsae vel aggregatae; cortex ca. 15,~ crassitudine,
hyphis pachydermeis, irregularibus, laxe contextis, cellulis exteris obscuris, sub strato
amorpho gelifacto, 20-3OP crassitudine (ex hyphis periclinalibus 7) ; algae protococcoideae,
cellulis ad 12r. diametro, in strato compacto, etiam sub hypothecio; medulla hyphis irregularibus,
subverticalibus, pachydermeis, laxissilhe contexta. Apothecia conglomerata in capitulis ad
0.5 mm. diametro, disco nigro, convexo; parathecium ca. 40p crassitudine ad latera thecii non
sub hypothecio, carbonaceum ; hypothecium 40-45r. crassitudine, dilute brunneum, pse~l(lnparencymaticum
ex hyphis plus minnsve periclinalibus conglutinatis obscurascens; thecium ca. 90r
altitudine; paraphyses tenues, dichotomae, apicibus inflatis, cellulis terminalibus sphaericis, nigris ;
epithecium 8-lor. crassitudine, obscure fuligineum; asci cylindrici, apicibus incrassatis,
evanescentes ; ascosporae obscure brunneae, nigricantes, biloculares, late ellipsoideae, non vel rare
septo constrictae, 9-11 X 6-7r..
Non-assimilative thallus of delicate strands of dark brownish hyphae, reticulate or irregularly
radiating, covering areas of a few mm. over quartz crystals; assimilative areoles up to 0.7
mm. in diameter, irregular in outline, flat, whitish scattered or closely aggregated, or reduced to
a small stalk bearing conglomerate apothecia ; cortex about 15r. thick, of thiclr-walled, very irregular
hyphae, loosely woven, outer cells blackened overlaid by a gelified layer 20-3OP thick, of
apparently periclinal hyphae; algae protococcoid, cells up to 12!~, mostly much smaller, formii~g
a compact layer under the hypothecium as well as the cortex, becoming scattered and disappearing
in the older thalli; medulla of irregular, thick-IT alled hyphae, very loosely woven, more or less
vertical.
Apothecia conglomerate in heads up to O.Smm. in diameter, disc black, convex; parathecium
about 40r. thick at the sides of the thecium, carbonaceous, not extending below the hypothecinm;
hypothecium 40-45r. thiclr, light brown, darkelling, pseudoparenchymato~is from conglntinatc,