LICHENS AND LICHEN. PARASITES

DODGE-LICHENS AND LICHEN PARASITE8 41
tlleciulll 25p crassitndine, basim lateraqne peritheciorum tegens, hyphis tenuibus dense contextnm ;
paraphyses sparsim septatae. perpendiculariter ramosae, flexuosae, circa lp diametro; asci
cq']jndrici-clavati, 140 X 20p, leptodermei ; ascosporae octonae, snbdistichae, hyalinae, ellipsoideae,
luliccllulares, 15-18 X 7-9p.
Thallns more than 240p thick, cartridge bnff, staincd greenish where bruiscd, continuous,
Inillutdy pitted, snrfacc dull, margins irre~~~larly lobed, thick; ecorticate, algae exteltdiilg
tllrongliont tlic thallus except for sonie periclinal hyphac at the base where tori1 from the roclr for
st-ctioning, palmelloid, cells subspherical 7-8p in diameter, hyphac more or less vertical between the
i~lgae. 13crithec:a immersed in the thallus, 0.4-0.5 mm. in diameter ; involncrellum carbonaceous,
75p tl~ick, extending about 250-400p from the ostiole, about half covered by the thallus; ostiole
40p io diameter, not depressed; perithecial wall hyaline, of slender, thick-walled hyphae merging
wit11 the involucrellum above; periphyses about lp in diameter, sparingly branched, cutting off
1)acilliform microconidia (spermatia?) at the tips; hypothecium 25p thick, extending up the
sides of the perithecial wall, of slender, densely woven hyphae; paraphyses sparingly septate,
branched at nearly right angles, flexuous, not abundant, about lp in diameter; asci cylindric
clavate, 140 X 2OP, thin-walled; ascospores subdistichous, 8 per ascus, hyaline, thin-walled, ellip-
soidal, niiicellular, 15-18 X 7-9p. I-.
Growing with Ph yllopyrenia t~scssllata and Placopsis bicolor.
The thallus contains irregular masses of carbonaceous material similar in texture to the
iii~~olncre!lum, mostly on the upper surface, sometimes deeply imbedded. This species may belong
ill Euvcrrucaria as the thallus does not cover the perithecia as much as in most species referred to
the subgenus Lithoicea.
Hcard Island, vicinity of Coriilthian Ray and Atlas Cove, B.A.N.Z.A.R.N. 13140-2, B140-3.
VERKUCARIA (LITHOICEA) TESSELLATULA Nyl.
1-o-lawa,riu (L:thoictm) tesse!latda Nyl. apud Crombie Journ. Bot. Brit. For., 13, 335, 1875.
Journ. Linn. Soc. Bot., 15, 191; 1876. Phil. Trans. Roy. Soc. [London], 168, 52; 1879. Rept.
Sci. Results Voy. "Challenger" Bot., 1,2, 240; 1885.
Type : IZergnelen, Swain's and Volage Bay, Royal Sound, A. E. Eaton (Veni~s Trailsit Exp.).
Thallns smooth, rimose areolate, 75-100p thick, pale smolry grey to deep greyish olive,
ccorticate but covered by a thin gelified layer; algae probably palmelloid cells cyliiidrical 7-8p in
diameter in sliort filaments of 34 cells of varying length (cells remaining cylindrical even when the
filan~eiit has diehtegrated). Perithecia 0.124.5 mm. in diameter mostly about 250p in diameter
alld 300p tall, semi-emersed but covered by a layer gf thallus about 2OP thick, thinning near the
csiiole; involncrellum carbonaceous, 75-90p thick coiiilate with the perithecial wall above and
extending about 250p from the ostiole, somewhat thickened outward and eildiilg abruptly ; perithccial
wall 15-20p thick, carbonaceous of compact periclinal hyphae, completely surrouilding
the tllecium except the ostiole which is about 30p in diameter; periphyses 30-35p tall, slender,
brallclled above, closely septate with gelified walls, about lp ip diameter, cutting of sinall bacillifor111
lllicrocoilidia (spermatia ?) at their tips; hypothecium 30p thick of densely woven slender
llypllae, not hliarply differentiated from the perithccial wall; paraphyses early cleliqnescing, lp
in diameter, branched, appareiltly not septate; asci ellipsoidal to cylindric clavate 8-spored
40 X 10-12p (immature) early disappearing ; a;cospores loiig ellipsoidal, unicellular, hyaline,
thin-wallecl, minutely gnttulate, filling the perithecial cavity, 11-15 X 9-llp.
Our material agrees are11 with the descriptiotis by Nylandcr except the size of the algal cells
(16-22,r in the type) and spores 10-15 x 7-gp, 1 n one of onr collectioils with seeming immature