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124 B.A.N.Z. ANTARCTIC RESEARCH EXPEDITION<br />
Apothecia solitary or concrescent in lines ; podetial axis not lacerate.<br />
Proliferating from the centre of the cup; corticate areolate, then verrucose and<br />
squamulose, finally decorticate ; cortex of primary thallus composed of conglutinate,<br />
gelified vertical hyphae ; chondroid axis 30-100p ; hypothecium 70-75p ; Macquarie<br />
Island . . . . . . . . . . . . . . C. Mawsoni<br />
Proliferating only from the margin of the cup or not proliferating.<br />
Podetia very slender, corticate below, then areolate and sorediate between the<br />
areoles and finally decorticate above; very rarely scyphiferous and then cups<br />
small, poorly developed ; axis 35p thick ; Auckland and Macquarie Islands<br />
C. sarmentosa<br />
Podetia stouter, usaually scyphiferous; cortex usually absent from podetia in<br />
all stages, usually farinose sorediore very rorely somewhat areolate corticate<br />
at the base.<br />
Primary thallus corticate on all sides, surface verrucose to almost cerebri-<br />
form ; Kerguelen . . . . . . . . C. kerguelensis<br />
Primary thallus not corticate below.<br />
Cortex of whitish primary thallus a mixture of periclinal and vertical<br />
hyphae conglutinate but not gelified, suggesting a pseudoparenchyma ;<br />
cups abruptly dilated above; chondroid axis 75-110p; hypothecium<br />
85-110p ; Kerguelen . . . . . . C, phyllophora<br />
Cortex of greenish primary thallus of vertical hyphae conglutinate and<br />
often highly gelified above.<br />
Cups gradually dilated upward, impellucid, splitting into lobes, not<br />
corticate below when young; axis 100-110p ; Macquarie Island.<br />
C. %orif ornzis<br />
Cups gradually dilated upward at first, then abruptly so, pellucid,<br />
margin not sp1:tting into lobes, areolate corticate below wheu<br />
young ; axis 210-15Op thick ; hypothecium 120p tall ; Kerguelen<br />
C. Johnstoni<br />
CLADCNIA SUBDIQITATA Nyl.<br />
Cladonia subdigitata Nyl., C. R. Acad Sci., 83, 88; 1876.<br />
Type : Campbell Island, Filhol.<br />
All of our material of this species belongs in thc following variety.<br />
CLADONIA SUBDIQITATA var. ALBINEA ~od~e, var. nov.<br />
Type : Macquarie Island, north end, Sta. 82, B.A.N.Z.A.R.E. B540-11.<br />
Thallus primarius orbicularis, 4-5 mm. diametro, verrucosus subisidiosuwe, marginibus verrucosis<br />
sublaceratis, imbricatus, concrescens circiter 300~ crassitudine, snperne pallide brnnneoolivacens<br />
vel glaucus, inferne sorediosus glaucescens vel albidus ; cortex fastigiatus mox gelifactus<br />
25-35~ crassitudine brunneo-olivaceus ; stratum a!garurn circiter 90-120p crassitudine, cellulis pro-<br />
tococcoideis circiter lop diametro coloniis parvis et cellulis singulis in medulla sparsis, soredia<br />
snperficiei inferae formantibus ; medulla laxe coiltexta hyphis pachyderrnaticis circiter 4p diametro.<br />
Podetia circiter 3 em. altitudine, 1-2 mm. diametro ad 5-6 mm. sensim dilatata, scyphifera,<br />
scyphis non dilatatis, marginibus integris sublaceratisve sed non proliferantibus inferne dense
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