Bd. IV: ır) THE LICHENS. 9 
Caloplaca athallina nov. spec. 
(Plate 2, fig. 14.) 
Thallus obsoletus; apothecia solitaria aut quasi contigua, flavescentia, margine 
instructa pallidiori, ad ı.ı mm lata, K sanguineo-rubescens; parathecium et hypo- 
thecium decolor; sporae octonae, hyalinae, polari-bicellulares, 107 — 12x 7—9 u magnae; 
spermogonia nulla visa; habitat ad muscos vetustiores, Graham Land, Paulet Island. 
Notes: This species, apart from its habitat, is characterised by a practically 
complete absence of any thallus. The spores are rather small, and the apothecia 
stand up fairly high from the moss plants on which the plant grows. 
Lecanora mons-nivis nov. spec. 
(Plate 2, fig. 15.) 
Thallus nullus aut tenuissimus, albido-flavescens, granuloso-crustaceus, saepius 
apotheciis solis constructus, K —; apothecia dense disposita et saepius lineas de- 
pressionis substrati occupantia, nigricantia, 0.s—I.o mm lata, irregulariter difformia, 
margine instructa pallidiori aut quasi albido et semper distincto; epithecium pruino- 
sum; parathecium et hypothecium hyalinum; paraphyses simplices, 2—3 u latae; 
asci 86—15 u magni; sporae octonae, hyalinae, unicellulares, 12—14x 5—7 u magnae; 
spermogonia nulla visa; habitat ad saxa, Graham Land, Seymour Island and Snow 
Hill Island. 
Notes: The most characteristic feature of this species which seems to be a very 
common object on the sand stone collected at Snow Hill Island is that it does not 
spread in all directions but mainly along the depressions in the surface of the sub- 
stratum. Long rows up to r cm and more in length are met with, being simply 
rows of apothecia, the row not being more than I mm in breadth, generally only 
0.5 mm. This method of growth and the marked white margin of the fruit gives 
the species a very distinctive appearance. The white margin (due to the amphi- 
thecium) is of course more marked in the younger than the older apothecia. 
Lecanora Skottsbergii nov. spec. 
(Plate 2 fig. 16, 17.) 
Thallus bene evolutus, crassus, albidus, K flavescens, profunde rimoso-areolatus 
et diffractus, margine in lacinias ecurrenti bene sed minute areolato-diffracto aut 
quasi granuloso-tuberculato-diffracto, hypothallo instructus nigro sed non bene viso; 
apothecia rotundata, nigra, ad 3 mm lata, primitus urceolata, deinde elevata, aperta, 
2—112865. Schwedische Südpolar- Expedition 1901—1903. 
