LICHENS AND LICHEN. PARASITES

16U B.A.N.Z. ANTARCTIC RESEARCH EXPEDITION
protococcoid, of large, ellipsoidal colonies, cells 7-9p in diameter; medulla 250-300p thick, of
densely woven, slender, more or less vertical hyphae imbedded in a gel. Apothecia immersed in low
thalline warts, mostly 2 per wart but having a single dark brown disc, surrounded by a thiclc.
slightly elevated, more or less crenate margin; parathecium 2WOp thiclc, hyaline, of very slender,
~~riclinal hyphae, not extending below the hypothecium ; hypothecium a deeply staining mass of
medullary tissue common to both thecia, of densely woven slender hyphae ; thecium 200-350p tall ;
paraphyses slender, sparingly septate, dichotomously branched, tips acuminate, ending in the
thecial gel ; asci ablong to clavate, walls 7-8p thick, 6 8 spored, about 330 X 110p ; ascospores hyaline
to pale olive, unicellular, ellipsoidal, 90-115 X 50-53p, sheath 9-12p thick. [Spermogonia
immersed in the thallus or apothecial warts, tip black, semi-emersed ; wall hyaline ; spermatiophores
lageniform cylindric, shorter than the spermatia; spermatia bacilliform, ends obtuse, nearly
straight to moderately curved, 12-18 X lp. Zahlbr.]
The specimen from Murray Island agrees in thalline characters, but the ascospores are
110-125 X 25-35p with a thin sheath only 4p thick, although the protoplast is already beginning
to stain less deeply.
Growing with Verrucarh Werthii, Lecidea Eatoni, Aspicilia. Eygontma, Lecmora atrocaesia and
R?lellia subplicata.
Kerguelen: Observatory Bay, B.A.N.Z.A.R.E. B192-5; Murray Island, 0-100 ft. Sta. 60,
B.A.N.Z.A.R.E. B530-9 ; Greenland Harbour, BA.N.Z.A.R.E. B177-29.
PERTUSARIA WERTHII Zahlbr.
Pertusaria Werthii Zahlbr., Deutsche Siidpolar Exp., 8,46 ; 1906.
? Lecanora tartarea Hook. f. & Tayl., London Jour. Bot., 3,644 ; 1884 : Cryptog. Antarct., 230 ; 1845.
Type : Kerg~~elea, Siidmire, E. Werth (Deutsche Siidpolar Exp.)
Thallus tartareous, thin, unequally rugose and rimulose, white or whitish, opaque, K- above,
slightly yellow within, C-. Apothecial warts sessile, hemispheric or depressed hemispheric, not
constricted at the base, somewhat constricted and irregular at the margin, solitary or 24 growing
together, monocarpic, up to 2 mm. broad, white, disc white, farinose, ostioles slightly depressed at
first, punctiform then broader, irregular and blackening; thecium subspherical, hyaline; hypothecium
rather thick, of densely woven hyphae, flesh-coloured, fuscescent ; paraphyses slender,
1.5p in diameter, flaccid, branched and anastomosing, longer than the asci, I-; asci cylindric clavate,
tip rounded, wall moderately thickened, straight, 200-210 X 3540p, normally 4-, rarely 6-8-spored ;
ascospores uniseriatc, hyaline, simple, variable in the same ascus, oblong, oblong-ovoid or broad
navicular, ends rounded or shortly and obtusely apiculate, sheath thick, 44-65 X 23-30p, K
violet when mature. Spermogonia immersed in the thallus or in apothecial warts, minute, ostiole
punctiform, blackened; spermatiophores fasciculate, lageniform-subulate, shorter than the spermatia
which are acicnlar-fusiform, slightly curved, 12-15 X lp.
We have seen no material referable here.
PERTUSARIA OCHRQLECHIOIDES Zahlbr.
~ertusw& ochrolechioides Zahlbr., Deutsche Siidpolar Exp., 8,46; 1906.
Type : Kerguelen, Penguin Bay and plateau of Stationsberg,' Werth, (Deutsche Siidpolar
Exp.) .
Thallus thin, about 100p thick, somewhat wrinkled and areolate rimulose, cartridge buff, some-
times stained ferrugineous, K yellowing not bounded by a dark margin; ecorticate; algae