LICHENS AND LICHEN. PARASITES

in groups, simplc or sonlewhat forltecl, disc slender, irregular in width; paratheciuln thick, car-
bonaceous, more or less flexuous; hypothecium thick, usually carbonaceous, rarely only dara
brown; paraphyses branched, anastomosi~lg, without septa; asci wlth 3-+spores; ascospores
brown, 2-celled, collstricted at the septum, cells of sonlewhat unequal size. Sperlilogollia spherical,
simple to somewhat coalesccd, more or less superficial ; spermatia. long, slender, straight.
This snlall Old World genus contains a few, widely-scattered species.
ENCEIJIIALGGRAIJ~~A
CEREBRINELLA (Nyl.) Zahlbr.
E~iccphnlogru.phu ccrcbri~iclla (Nyl.) Zahlbr. in Engler aid Prantl, Die Natiirlich. Pflaiuenfan~.
I, l', 94; 1903. Deutsche Siidpolar Exp., 8, 51; 1906.
Lccitlea cwobrinella Nyl. in Crombie, Jour. Bot. Brit. For., 14, 22; 1875. JOII~. Linn. Soc. Bot.,
15, 191 ; 1876. Phil. Trans. Roy. Soc. [London], 168, 52; 1879. Rept. Sci. Itesults Voy.
"Challe~lger" 13ot., 1, 2, 239; 1885.
B Lccidea stellzilata Tayl. in Hook. f. & Tayl., Lonclorl Jour. Bat., 3, 636; 1844. Crypt. Antarct.,
233; 1845. F1. Antarct., 2, 539; 1847. Crombie, Jour. Bot. Brit. For., 15, 105; 1877. Phil.
Trans. Roy. Soc. [London], 168, 52 ; 1879. Hept. Sci. Res111ts Voy. " Challenger" Bot., 1, 2,
240 ; 1885. non Tayl. in Macltay, F1. Hibern., 2, 118 ; 1836.
Blbcllia stelluluta Tuck., Enll. Torrey Bot. Club, 6, 59; 1875. Bull. lJ.S. Nat. blus., 3, 30; 1876
lion alio loco.
Type : Kerguelen, Observatory Bay, A. E. Eaton (Venus Transit Exp.).
Thallus very thin, greyish ashy aiid darkening to almost black, continuous, with very fine
wrinkles, IL yellowiilg [jide Nyl.] ; algae Palmella, cells about ~ Jin A diameter. Lirellae crowded
in cerebriform groups, somewhat elongate. immersed in the thallus (i.e. sections show thallilie
tissue between contiguous lirellae nearly to the top of the parathecium) ; paratheciuni carbonaceous,
upper surface minutely ridged (but not split as in some sections of Graphis), about 60-75~~
thick and extending about 20OP below the hypothccium; hypothecium not clearly differelltiated;
theeinm about 75~ tall and wide; paraphyses dichotomously branched, very slender, imbedded
in the thecial gel and apparently disappearing ; asci 8-spored, cylindric, early disappearing ; asco- '
spores monostichous, brown, 2-celled, 9-11 x 6-7.5~~, thin-walled, often one cell larger thau the
other, septum thin.
This species might easily be mirstaken for a Huellia with crowded apothecia, since occasioiial
solitary apothecia are not conspicnously elongate. The spores are more like those of Rinoclina
sect. Placothallia (Trev.) Vainio. The species is closely related to E. otagensis (Linds.) lIiil1.-Arg.
from New Zealand, from which it differs in the smaller spores and thinner thallus.
Hooker's specimen from Christmas Harbour was not found by Crombie (loc. cit. 1877) and
Kidder's specimen in the Tuckerman herbarium at the Farlow herbarium is not labelled as B. stellulata.
As Tuckerman did not recognize E. cerebrinella, which might easily be taken for Buellia by
the techniques common in Tuckerman's time, it seems likely that reports of Buellia stellcclata listed
above, belong here. I failed to find IIooker's specimen in Taylor's herbarium although specinlella
labelled L. stel1ula.ta from other localities collected on the same expedition are present.
Growing on roclts with Leeidea asbolodes, L. intersita, L. Werthii, Rhizocarpon keryuelense,
Pertusaria subperrimosa, Aspicilia disjunguenda, A. endochlora, Lecanora ~~troc~esia, Aspicilwpsis
macrophthalma, Kutttinyeria crozetiw, Pyrenodesmiu vitellinella, Buellia subplicata, and
B. tristiuscda.
Crozet Archipelago : Possessioll Island, American Bay, 6 m., B.A.N.Z.A.R.E. B20-4.
Kerguelen: Royal Sound, B.A.N.Z.A.R.E. B90-1, B90-2, B90-3, B90-4, B126-7, B126-8,