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146 B.A.N.Z. ANTARCTIC RESEAFEH EXPEDITION<br />
Apothecia lecideine, disc smooth or papillate, or gyrose plicate; asci 1, 2 or 8-cel1ed;'ascospores 1,<br />
2-celled or muriform, hyaline or brown. Spermogonia papillate, immersed, with black tips,<br />
spermatiophores branclied ; spermatia short, cylindric.<br />
With rhizinae below ; monophyllous<br />
With marginal rhizinae ; ashy pruinose above<br />
Pale below, rhizinae of under side flattened<br />
Buscous below ; rhizisae of under side cylindric<br />
Without marginal rhizinae; black below<br />
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U. cylindrica<br />
U. cristata<br />
Rhizinae flattened and concrescent into trabeculae ; medulla very dense throughout<br />
U. Dillenii v. solida<br />
Rhizinae cylilidric (at least not flattened and cohcrescent) ; medulla very loose above,<br />
more dense and hyphae more periclinal below; lower cortex of irregularly arranged<br />
sphericil dark brown cells, 10-20p thick<br />
TJpper surface rimose areolate<br />
Upper surface bay, upper cortex 20-.35,~, cells 4-7p; S. Orkneys U. antarctica<br />
Upper surface mouse grey, upper cortex 25-50p, cells Up; S. Victoria Land<br />
Ui spongiosa v. subvirginis<br />
Upper surface slightly rimnlose in the centre, rest smooth, mummy brown to light<br />
buff; upper cortex 20-25p, cells 2-3,u ; Marie Byrd Land . . U. spongiosa<br />
Without rhizinae below<br />
Areolate-verrucose below ; monophyllous<br />
Glabrous or rarely white granulate below<br />
. . . . . . U. rigidu<br />
Upper cortex rimulose areolate, ashy pruinose; below black with pale margins; Ile<br />
-,<br />
Brabant . . . . . . . . . . U. leiocarpa v. nana<br />
Upper surface reticulate rugose<br />
Upper cortex 150,u, with fine rimose areolae, dark grey or brown; below black<br />
with pale margins . . . . ... . . . . U. .deczcsspta<br />
Upper cortex 50-100p<br />
Upper cortex 8OP, decomposed, medulla of loose periclinal hyphae, algal<br />
layer 50-80p, lower cortex 60-70,~; Booth-Wandel Island U. eximia<br />
I<br />
Upper cortex fasigiate to pseudoparenchymatous; upper medulla loose,<br />
lower 35,~ of conglutinate hyphae more or less perpendicular to the upper<br />
medullary hyphae, algal layer 35p, lower cortex 1220p ; George V Land<br />
U. Hunteri<br />
Upper cortex usually less than 40p thick<br />
Lower part of upper cortex periclinal to irregular, upper half brown, fastigiate;<br />
lower portion of medulla compact subfastigiate; lower cortex lop,<br />
pseudoparenchymatous dark brown ; King George V Land<br />
Chmcotia cerebriformis<br />
Upper cortex wholly fastigiate.<br />
Medulla dense, of periclinal hyphae, lower 40-50p intricate ; Jenny Island<br />
U. parvula<br />
Medulla loose throughout, upper cortex 10-15p, lower cortex up to 40p both<br />
pseudoparenchymatous ; Marie Byrd Land to Queen Mary Land<br />
U. rugosa<br />
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