LICHENS AND LICHEN. PARASITES

DODGE--LICHENS AND LICHEN PARASITE8 179
more interwoven and deeply staining just below the thecium, with scattered algal cells in the lower
portion; thecium 160p tall; paraphyses flexuous, dichotomously branched and anastomosing, tips
free, extending to unequal heights above the thecinnl, septate but not conspicllously moililiform ;
asci thin-walled, 8-spored, cylindric, 140-145 X 15p; ascospores nlonosticl~ons, ellipsoidal, thin-
walled, 15 X lop.
Ss I have been nilable to see the type of Lecnrlora ge!irla v. tlifellinn nor Eouly de Lesdain's
interpretation of this name, I am uncertain of its identity with the prexent species. Babington
described his variety as "thallo vitellino." I have seen no spores free from the ascus, so the
measurements given above may be too small for mature spores. While macroscopically this paler
species with lighter disc, even in nloribund apothecia, might be referred to P. bicolor, its internal
structure is clearly distinct.
Kerguelen: near Port Jeanne d'Arc, 1,400 ft., B.A.N.Z.A.R.E. B200-8; Royal Sound,
R. Hall, Nat. Herb. Melbourne Bot. Card., sub. Lmidea sificej-zila.
LECANIA Mass.
Lecanie Massalongo, A!cun. Gen. Lich., 12; 1855.
The type species is Lecania fwcella Mass.
Thallus crustose, uniform, effigurate or somen-hat squamose, attached to the substrate by
hyphae of the prothallus or of the medillla, without rhizinae, heteroinerous ; ecorticate or corticate ;
algae protococcoid; medulla loosely woven of thin-walled hyphae. Apothecia sessile, round,
lecanorine; parathecium not well developed; hypothecium hyaliile with algae below; paraphyses
slender ; asci cyliildric nornlally 8-, exceptionally 16-32-spored ; ascospores hyaline, ellipsoid to
elongate, straight or curved, 2- or more celled, thin-walled with cgliiidric cells.
LECANIA HEARDENSIS Dodge, sp. nov.
Type : Heard Island, between Atlas Cove and Corinthian Bag, B.A.N.Z.A.R.E. B140-27.
Thallus 25Op crassitudine, rimuloso-areolntus, cinerens, indeterminatns; ecorticatus,
llomoeomerus ; ~lgae protococcoicleae, cellulis 7-lop diametro, subpolyhedricis, hyphis medullaribus
parois cum cryqtallis. Apothecia solitaria, 0.3-0.4 mm. diametro, immersa dein subelevata, disco
convexo, flnvo, prninoso; amphithecium non bene evolutum; parathecinm hyalinum, 35p crassitudine
hyphis pachydermeis gelifactis, non sub hypothecio ; hypothecinm 100p altitndine, obconicurn,
hyphis verticalibns leptodermeis; thecium circiter 90p altitndine; parapfiyses tennes, super ascos
dichotome ramosae, apicibus non incramatis; asci cylindrici apicibi~s incrassatis, papillatis,
55 X 6-7p dein late clavati aut snbspherici, leptodermei, 15-18p diametro; ascosporae hyalinae,
uniseptatae, ellipsoideae, leptodermae, 10-12 X 4-5p.
Thallus 250p thick, rimulose areolate, ashy, indeterminate; ecorticate, homoeomerous; algae
protococcoid, cells 7-lop n diameter, somewhat polyhedral, separated by mednllar hyphae with
very mall crystals in the upper portion and rock crystals below. Apothecia solitary, 0.3-0.4 mm.
in diameter, immersed at first, then slightly elevated, disc convex, bright chalcedony yellow,
pruinose, amphithecium not differentiated from the thallus; parathecinm hyaline, 35p thick.
covered by a layer of yellowish brown crystals about 20p thick, composed of thick-walled,
periclinal, gelified hyphae with nearly spherical protoplasts, not extending below the thecium;
hypothecium about 100p tall, obconic, of vertical thin-walled hyphae not sharply differentiated
from the thecinm above and resting on the algal layer ; thecium about 90p tall ; paraphyses slender,
dichotomously branched above tlie asci, tips not enlarged, ending in the epithecial gel, which is