Type: Kerguelen, Observatory Bay, A. E. Eaton (Venus Transit Exp.). Thallus ashy, rimose areolate, thin, R-; ecor ticate; algae protococcoicl, hypl~ae very slelltler, densely woven, including crystals of roclrs. Apothecia about 0.1 mm. in diameter, crowded, angular, coalescent ; parathecium carbonaceous, 30-35p thiclr, extending about 75p under the hypothecium, then narrowing to about 20p and extending inward and downward as fuliginous periclinal hyphae about 2p in diameter and disappearing in the medulla; hypothecium of slightly brownish subvertical loosely woven hyphae, becoming hyaline and periclinal in a compact layer abont 8p thick below the thecium; thecium about 58p tall; parapliyscs flexuous, slciicler, iiot ~ulnieroils, bralichii~g t~vice or thrice in the upper portioii, ultimate braliches terniiiiati~ig in a cla~atc, bl~ish~black cell which cuts off a spherical black cell; asci broadly clavate, 3540 X 9-12p, tip thickened, protoplast truncate, umbonate at first, 8-spored ; ascospores distichous, ellipsoidal, 10-15 X 4-6,u, nucleus central with dense strands of protoplasm, giving the spore a %celled appearance, so that this species might be mistaken for n Catillr1,rk without careful examination. On rocks with Rhizocarpcm. kerguelense R. Mawsoni. Aspicilia. d:sjwnguenda, A. endochlara, Lecanora atrocaesiu, Blmtenia Aziberti and Buellia subplicata; also on old timber of Transit Venus Expedition hut, where the thallus is mostly inside the weathered wool cells, showing oiily as whitish patches. Kergnelen: Observatory Bay, Sta. 56 B.A.N.Z.A.R.E. B192-26, B195-1; Murray Island, B.A.N.Z.A.R.E. B2104 ; Royal Sound, R90-S. Heard Island : between Atlas Cove and Corinthian Bay, B.A.N.Z.A.R.E. B140-24. LFXIDEA URBANSKYANA Zahlbr. Lecdm Urbanskyam Zahlbr., Deutsche Sudpolar Exp., 8, 38; 1906. Type: Kerguelen, plateau of Stationberg, strand of Penguin Bay and valley between Station aiid Mittelberg, Werth (Deutsche Siidpolar Exp.). Thallus up to 100p thick, subareolate rimulose, leaden ashy (often stained by iron), I
DODGE-<strong><strong>LICHEN</strong>S</strong> <strong>AND</strong> <strong>LICHEN</strong> <strong>PARASITES</strong> 89 Type : Kerguelen, Royal Sound, 0bservator)- Ray, A. E. Eaton (Venus TI-ansit Exp.). Thallus thin, 160-190p thick, white, limited by a black hypothallus, determinate, margins slightly lobate, surface smooth or nearly so, mi~~utely rimosc; cortcx about lop thick of pcriclinal, gelified hyphac; algal layer 75-100p thick of protococcoicl cells about 6-lop in diameter with thick gclified walls; medulla of slender, densely wove11 hyphae. Apothecia semi-immerscd to sessile, black, 0-6-0-7t( mm. in diameter, margin prominent, disc plane to slightly concave, black; parathecium carbonaceous, 10&120p thick cstel~ding about onc third the distance under the hypothecium, the central third under the hypothecium thinner, pale brown to almost hyalii~e and merging with the mcdulla below and thc hypotlleciunl above; hypotheci~~m hyaline, 35-50p thick, of periclinal, loosely woven hgphac, passing into subvertical hyphae above and not sharply differentiated from the thecium ; thccium 50-60p tall ; epithecium bluish ; paraphyses slender, hyaline, once or twice branched in the upper third, tips uot enlarged, imbedded in the thecial gel; asci clavate, 50 X 10-12p, tip thickened, protoplast umbonate; ascospores ellipsoid, hyaline, wall rather thick, nucleus and protoplasmic strands staining deeply and simulating a septum, 10-12 X 6-7p. On rock with 17errzicaria obfzucata. The above description is based on B.A.N.X.A.R.E. B2069. The thallus of B177-2 appears somewhat thicker bnt the surface is badly eroded and the marginal lobules appear somewhat more prominent. Zahlrbuckner, Deutsche Siidpolar Esp., 8, 27; 1906, describes spermogonia from Station lake, Urbansky, as immersed, spherical with black apex, wall fuliginons, dimidiate; spermatiophores densely fasciculate, subfiliform 17-18p long; spermatia nearly straight to moderately or strongly curved and hamate, 17-23 X 1p. Kerguelen : Greenland Harbour, B.A.N.Z.A. R.E. B177-2, B204-9. Heard Island : between Atlas Cove and Corinthian Bay, B.A.N.Z.A.R.E. B140-22. LECIDEA SUBAWENTIENS var. BRACIIYBASIDIA Zahlbr. L, subusse~ttiens var. brachybasidia Zahlbr., Deutsche Siidpolar Exp., 8, 37; 1906. Type : Kerguelen, cliff wall on the Siidmire, Werth (Deutsche Siidpolar Exp.) . Apothecia larger up to 1 mm. broad, epitheciurn olive, blackening. Spermogonia as in the typical species, spermatiophores short, 8-9 X 2-3p, ampullaceo-cylindric; spermatia variously curved or hamate. As we have not seen either type of spermogonia in this species we have not been able to identify this variety in our material. The description of the epithecium and the illustration suggest L. Aubsrti Bonly de Lesdain (see below). LECJDEA AUBERTI Rouly de Lesdain. Lecidea ~ubdrti Bouly de Lesdain, Ann. Cryptog. Exot. 4: 99. 1931. Type: ICerguelen, Port Jeanne d'Arc, AuberC de la Riie 18. Thallus white, uniform, indeterminate, very thin and continuous near the margin, centre areolate diffract and thicker, K yellow; cortex 65p thick of subspherical cells and many crystals; algae protococcoid, cells up to 8p in diameter in rounded groups just under the cortex, more scattered and ellipsoidal below; medullary hyphae slender, closely woven, mostly vertical. Apothecia 0.5-0.6 mm. in diameter, scattered or sometimes crowded, then somewhat angular, margin slightly crenate, disc plane, covered with an ochraceous pruina (somewhat lighter than that of L. phaeostoma) when young, becoming black when old, occasionally with sterile papillae or almost gyrose ; parathecium carbonaceous, marbled with lighter veins, 180p thick, not ex- tending much below the hypothecium and only to the cortex of the thallus; lower portion of the hypothecium about 20OP thick of closely woven subvertical medullary tissue with scattered algal