LICHENS AND LICHEN. PARASITES

DODGE--LICHENS AND LICHEN PARASITES 61
12126-9; Greenland Harbour, R.A.N.Z.A.R.E. I3177-14, l3177-15 ; Murray Tslancl, B.A.N.Z.A.R.E.
12211-1, B530-2, B530-3; Mt. Wyville Tholllpson, B.A.N.Z.A.R.E. B246-2; Observatol-y Bay,
R.A.N.Z.A.R.E. B192-3 1, B192-67 ; JIolloy Point, J. XI. Kidder (U.S. Transit of Venns Exp. in
T~lcl;. IIerb. 3273).
IIetlrtl Tslaild : Atlas Cove and Corinthian Bay, G.A.N.Z.A.R.E. B140-9.
LECANACTIDACEAE.
Thallus crustose, ~uliforin, ecorticate, usually homoeomerous, algae Trenfepolilia. Apothecia
circular, sessile or immersed, parathecinm poorly developed, or well developed and carbonaceons,
sonletimes with an amphithecinin ; paraphyses branched and anastomosing; ascospores fusifor111
to acicular, septate, hyaline, cells approxi~llately cylindric, thin-walled ; spermatia exobasidial.
.Leccrna.ctis Eschw., Syst. Lich., 14; 1824.
ScoEecactG Clements, Gen. Fung., 76; 1909.
Type: None designated. A. lobnta Eschw. was figured, Lichen lylacen Sm. and Sow., Engl.
Rot., 12, pl. 809; 1801: and Opegrapha asfroiden Sm. and Sow., Engl. Bot., 26, pl. 1847; 1808 are
~n~ntioned. L. lobata was referred to Phneogva.phis sect. Leiogramma by hfiiller-Argau and
T,ichen lyncea to Opegrapho,. The type of Scolecactis is Lecidea myrkdea FCe.
Thallns crustose, uniform, mostly homoeonierous, ecorticate, without rhizinae, algae Trentepoklin.
Apothecia immersed, appressed or sessile, single or crowded, circular, lecideine with a
carbonaceous parathecium continuous below the hypothecium; no amphithecium; paraphyses
branched and anastomosing, slender; asci 4-8-spored; ascospores hyaline, fusiform to acicular,
4-16-celled, cells cylindric. Spermogonia spherical with a hemispheric carbonaceous 1~7all; spermatia
exobasidial, ovoid elongate to cylindrical.
LECANACTIS KERCUELENSIS Dodge, sp. nov.
? Leeidea, nnaylacen Crombie, Jonr. Linn. Soc. Bot., 15, 188; 1876. Jour. Bot. Brit. For., 15, 104;
1877. Phil. Trans. Roy. Soc. [London], 168.50; 1879. Rept. Sci. Results Voy. "Challenger"
Rot., 1, 2, 237; 1885. 1
Type: Kerguelen, Greenland Harbour, R.A.N.Z.A.R.E. B177-16.
Thallus indeterminatus, minute areolatus, vel etiam subgranulosus, niger, ad 200~ crassitudine
; ecorticatus ; homoeomerus, algae Trentepohlia, cellulis angularibus, filamentis brevibns, 7-8~
diametro, cellulis ad lop longitudine. Apothecia 0.13 mm. diametro; parathecium nigrum,
n~wop crassitudine, carbonacenm; hypothecium 3540~ crassitudine brunneum, hyphis dense
contexturn ; thecium 3540~ altitudine ; paraphyses pertenues, anastomosantes, apicibus submonilifol-mibus
ad 4~ diametro, obscure brunneis ; asci cylindrici, 30 X 7-8~, apicibns incrassatis, protoplasto
truncato, 22 X 4 ~ ascosporae ; octonae, aciculares, quadriloculares, hyalinae, 10-12 X 2-3~.
Thallus indeterminate, minutely areolate, at times appearing almost granulose, black, dull,
about 200~ thick, ecorticate, homoeomerous ; algae TrenteipohJia, cells angular, filaments short, 7-8~
ill diameter, cells up to lop long. Apothecia 0.13 mm. in diameter; parathecium black, 3540~
thick, carbonaceous; hypothecium 3540P thick, brownish, of densely woven hyphae; thecium
3540~ tall; paraphyses very slender, anastomosing, imbedded in the thecial gel, ending above in
short, Moniliform chains of swollen cells about 4~ in diameter; dark brown, forming the epithecium;
asci cylindric, 30 X 7-8~, tip rounded, thickened, protoplast truncate, 8-spored, 22 X 4 ~ ;
ascospores acieular 4-celled, hyaline, 10-12 X 2-3~.