LICHENS AND LICHEN. PARASITES

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80 B.A.N.Z. ANTARCTIC RESEARCH EXPEDITION linear lobes 3 mm. wide and large, black, marginal apothecia abont 3 mm. in diameter. This is so aberrant from the othrr members that we cau disregard it in selecting the type. Perhaps it is S. homseophylla Nyl. Hooker & Taylor note that the specimens from the Falkland Islands have very wide lobes, and since they consider these specimens aberrant, we can eliminate them, although they happen to be the oiily ones studied by Muller-Argan i11 1887 who referred them to S. Freycinetii. No. 1307 [or 13171 from Van Diemen's Land (= Tasmania) is aberrant from all the others in having a scrobicnlate thallns and much shallower lobing (cf. S. psi!ophylla Miill.- Arg.). The spccimen collected by J. D. Hooker Ang. 24, 1840 in Van Diemen's Land is very close to 8. Delisea as figured by Delise from the type in King Island. The specimens collected bj- Gunn from Tasmania are rather poor and ambiguous but apparently arc S. L)alisea, referred by Muller-Argan to S. Freycinetii var. prolifcra Mull.-Arg. Miiller-Argau refers the Cape Horn material to 8. Freycinelii var. f~dvo-cinerea (Mont.) Nyl. This leaves a residue of specimens from Lord Auckland's group and Campbell Island which are fairly uniform in appearance. Of these, that "from Lord Auclrland's group, J. D. Hooker [Nov. 20-Dec. 12, 1840, sent Taylor in] 1844" may be considered the type as it is the best developed and most fertile. The following description is based on thc broader specimen with notes on two specimens from Campbell Island. Our material from Macquarie Island has the measurements of the material from Campbell Island. R. Freycinetii var. glabrescens was based on duplicate collections from Auckland and Campbell Islands, J. D. Hooker (not the specimens in Taylor's herbarium) and a specimen froni New Zealand, Lyall. Thallus large, lobes very irregnlar, rounded, margins crisped, smooth or crenulate, sometimes minutely so and appearing lacerate, (much less so than in S. Delisea) surface glabrous, smooth or slightly rugose, drying chamois, tinged orange cinnamon to warm sepia, very fragile, proliferating from broken edges and occasionally the margins, as flat isidioid lobules or as continuous bands of small soredia (while i11 P. Delisea the isidia are more terete and coralloid) ; below black in the centre, shading to cinnamon at the margins and tips; pseudocyphellae prominent, white, of medium size; upper cortex 25p thick, of irregular thin-walled pseudoparenchyma, cells abont 7-8~ in diameter; outer cells forming a tomentum at least under the apothecia; algal layer 3510p thick, protococcoid, cells 8-lop in diameter; medulla about 100p thick, of loosely woven, more or less periclinal, thin-walled hyphae about 34p in diameter; lower cortex about 40-50~ thiclr, of brown, thick-walled, more or less periclinal pseudoparenchyma, cells 7-8p in diameter, the outer layer very dark brown, giving rise to tufts and scattered septate rhizinae, 5-6p in diameter, cells 8-llP long. Apothecia 3.54 mm. in diameter, disc concave, chestnut, exciple minutely tomentose, hairs short; amphithecial cortex about 65p thick, of irregular pseudoparenchyma, protoplasts 7-8p in diameter, outermost growing out as a fine short tomentum; algal layer 15-20~ thick, not well developed ; medulla continuous with that of the thallus and of the same texture ; parathecinm blbownish, 3540~ thick, of densely woven periclinal hyphae; hypothecium not differentiated; thecium 80-90p tall ; paraphyses slender, septate, tips slightly clavate, epithecial. gel not well developed nor coloured; asci cylindric, 55 X 35p; ascospores hyaKne, two-celled, ellipsoid, 20-22 X 7-8p, apices obtuse. Spermogonia 8 5 tall, ~ 120p in diameter, wall not well dereloped; spermatiophores typical, spermatia ellipsoid, 1.5 X 2p [in material from Campbell Island in Clinton Herb.]. The material from Campbell Island agrees well with the above, but the thallus is somewhat thicker and all dimensions larger, e.g. upper cortex 354Op thick ; algal layer 35-40p ; medulIa 140-15OP, lower cortex 3540p. Lord hnckland Group : J. D. Hookcr (Vov. " Erebns & Terror ") in Taylor Herb., type.
DODGE-LICHEN8 AND LICHEN PARASITES 81 Campbell Island, J. D. Hooker (Voy. "Erebus & Terror") in Taylor Herb. and Clinton Herb. at Buffalo Mllsellm of Natural History. Macquaric Island : B.A.N.Z.A.R.E. 1658-1, Featherbed Flat, B.A.N.Z.A.R.E. 531-6, 531-7 ; fIigl~lilnds, R.A.N.Z.2Z.R.E. 534-3 ; uorth end, R.A.N.Z.A.R.E. 540-6, 540-7 ; top nf hill, Wind Desert, B. Hamilton, A.A.E. 109. PELTIGERACEAE. Thalhls foliosc, heteromerous, corticate above and usually ecorticate below (except in Neph- ronrn) ; cortex of large-celled pseudoparenchyma, several layers of cells thick; algae either Pc~lnlella or Nostoc; medulla of loosely woven, slender hyphae, veined below, with rhizinae. Apothecia imlate, superficial or on the upper or lower surface of the margins of the lobes; para- thrcium little developed, hypathecium hyaline ; paraphyses unbranched; asci (2-) 8-spored (many spored in Solorinelln) ; ascospores hyaline (or brown in Solorina), ellipsoid, fusiform or acicular, 2 or more celled, thin-walled PELTIGERA Willd. Peltigera Willd., 5'1. Berol. Prodr., 347; 1787. Nyl., Naturaliste, 2, 387; 1884 [annGe 61. Peltidia Ach. [as ssubgenus], I
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phaeospora Hepp, Flecht. Eur., 947
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INDEX. For convenience of reference
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