4 OTTO VERNON DARBISHIRE, (Schwed. Südpolar-Exp. 
Lecidea agellata nov. spec. 
(Plate! 1, fig. 3.) 
Thallus flori lactis sordide concolor, tenuis sed firmus, continuus, rimoSo-areo- 
latus, K —, saepius sterilis, ut Azsocarpon geographicum geographice margine nigro 
divisus; apothecia non frequentia, nigra, immersa, lecideina, plus minus rotundata, 
0.5 —I.o mm magnae; epithecium carbonaceum; parathecium et hypothecium decolor; 
sporae octonae uni- ad polyseriatim dispositae, hyalinae, unicellulares, 10—14x6—8 u 
magnae; spermogonia et soralia non visa; habitat ad saxa, Falkland Islands, Port 
Louis. 
Notes: This species appears to be not far separated from Zeezdea cyanea (ACH.) 
Tu. Fr. which is known from Kerguelen. A very characteristic feature of our new 
speeies is the frequent absence of apothecia and still more the chart-like division of 
the thallus not unlike that met with in Rzzocarpon geograplicum. When thallus 
meets thallus a thick black margin is formed and growth seems to come to an end. 
“Flori lactis concolor” stands for cream-coloured, “agellata” for divided into small 
fields. 
Lecidea protracta nov. spec. 
(Plate ı, fig. 4.) 
Thallus flori lactis concolor, aut quasi parce flavescens, crassiusculus, continuus 
et glaberrimus, aut rimosus ut limus desiccatus, K externe intense flavescens et interne 
rubescens; hypothallus colori chalybeius; apothecia rara, nigra, lecideina, emergentia, 
marginata et dein quasi immarginata, plana, 0.s—1I.g mm lata; epithecium et para- 
thecium carbonaceum; hypothecium decolor; sporae octonae, polyseriatim dispositae, 
hyalinae, unicellulares, $S—14x4—6 u magnae; spermogonia et soralia non visa; ha- 
bitat ad saxa, Falkland Islands. 
Notes: The greater portion of this cream to yellow coloured thallus is smooth 
and exhibits no areolation. In places the areolation becomes very marked but it 
does not resemble the true areolation met with in most crustaceous plants but it is 
rather like the breaking up into areoles found in dried up mud or clay. Another 
characteristic feature is the steel blue hypothallus or margin. It is so well developed 
that frequently the thallus which is rather thin nearer the margin appears itself steel 
blue owing to the hypothallus below becoming visible through the upper layers. In 
contact with the thallus of another lichen individual a thick dark green ridge is 
formed and growth ceases. 
Lecidea lapillicola nov. spec. 
(Plate ı, fig. 5, 6.) 
Thallus effusus, 0.>—0.7 mm crassus, contiguus vel parce et irregulariter rimoso- 
areolatus, albido-coerulescens aut substrato subconcolor, K flavescens aut —, hyphis 
