LICHENS AND LICHEN. PARASITES

DODGE--LICEENS AND LICHEN PARASITES 24 3
[Spermogonia immersed in the thallus; spermatiophores few septate; spermatia short and
slender.-Nylander.] Such spermogonia as I have seen have been rather old, so that I have been
unable to make out details of structure.
One specimen from the Crozet Archipelago has a thicker, lighter thallus with somewhat
smaller spores, but it is otherwise similar.
On rocks with Coccotrema kergden&, Pwinh; Werthii, Encephdographa cerebriltella,
Ionarpis kerguelensk, Steinera Werthii, Leeidea Auberti, L. Eatoni, L. intersita, L. kerguelensis,
L. phaeostoma, Catillaria kerguebewis, Mykobla.stzts perustus, Rhizocarpon candislum,
R. kerguelense, R. urceo!inum, Pertusaria cineraria, P. ochrvlechioides, P. sz~bperrintosa, Aspicilia
&sjungu&a, A. endochlora, L ~amra atrma,aia, Aspin'liopsis macrophthalma, PZacopsis bicolor,
Candelaria parasitico, Bla-stenicc keroplasta v. athc;Ellha and Buellio subplicatcp.
Crozet Archipelago : Possession Island, American Bay, B.A.N.Z.A.R.E. B20-1, B20-15.
Kerguelen : Royal Sound, B.A.N.Z.A.R.E. B126-9, B126-21; Greenland Harbour,
B.A.N.Z.A.R.E. B177-12, B177y21 B177-25, B177-30, B177-37, B177-42, B177-52, B177-58,
B177-63, B177-64; Observatory Bay, B.A.N.Z.A:R.E. B192-11, B192-13, B192-14, B192-19,
B192-23, B192-29, B192-34, B192-36, B192-39, B192-43, B192-46, B192-65; Murray Island,
B.A.N.Z.A.R.E. B210-3, B210-5, B211-2, B530-6 ; Mt. Wyville Thompson, 1,000-1,500
B.A.N.Z.A.R.E. B246-28.
Heard Island : between Atlas Cove and Corinthian Bay, B.A.N.Z.A.R.E. B140-25.
ft.,
BUELLIA MAWSONI Dodge, sp. nov.
Type : Macquarie Island, Featherbed Flat, B.A.N.Z.A.R.E. B533-8.
Thallus albidus vel cinereus, rimoso-areolatns, indeterminatus; cortex ca. 35p crassitudine,
fastigiatus, hyphis verticalibus pachydermeis, cellulis 4 X 2p; stratum algarum ca. 75p crassitn-
dine, filamentis verticalibus, Trelltepohlioideis 9,5p diametro, cellulis cylindricis, ca. 10 X 5p, vel
solitariis magis elliipoideis majoribusque ; medulla ca. 75p crassitudine, hyphis tenuibus compacte ,
contextis, subverticalibm. Apothecia semi-emersis, morgine nigro, non elevato, disco plano dein
convexo, immarginataque; parathecinm ca. 20pcrassitudine ad latera thecii et 180p crassitudine
sub hypothecio, nigrum, carbonaceum; hypothecium ca. 75p crassitudine, hyphis verticalibus,
crassis, brunneis; thecium ca. 75p altitudine; paraphyses tenuissimae, super ascos ramosae, api-
cibus brunneis, clavatis, 10-11 .X5-6p, cellula tc rminali sphaerica pachydermea ; asci cylindrici
vel clavati, ca. 60 X 12p, apicibus juventute incrassatis, protoplastis insuper conicis; ascosporae
monostichae vel subdistichae, brunneae, 2-loculares, 14-16 X 7-8p. Spermogonia non visa.
Thallus white or ashy, rimose-areolate, indeterminate; cortex about 35p thick, a palisade of
thick-walled hyphae, cells about 4 X 2p, decomposing above; algal layer about 75p thick, of ver-
tical filaments of Trentepoh!ia 4 about 5p in diameter, cells about twice as long as the diameter,
dissociated cells ellipsoidal, somewhat larger; medulla about 75p thick, of closely woven, slender,
subvertical hyphae.
Apothecia semi-emersed, black, margin not elevated, disc plane becoming convex and im-
marginate; parathecium about 20p thick on the sides of the thecinm and 180p thick below the
hypothecium, black, carbonaceous; hypothecjum about 75p thick, of coarse, brown, ver-
tical hyphae; thecium about 75p tall; paraphyses very slender, branching abundantly just above
the asci, tips brown, clavate, 10-11 X 5-6p, two celled, the terminal cell spherical, thick-walled ;
asci cylindric to clavate, about 60 X 12p, tip thickened when young, protoplast conic above ;
ascospores monostichous to sub-distichous, brown, 2-locular, walls of uniform thickness, 14-16 X
7-8~. Spermogonia not seen.