LICHENES. 7 
running at right angles to the surface of the thallus. The plant appears as a small 
dark convolute lichen on a grey background of solidified volcanic ash, the most bleak 
substratum one can imagine. 
NEUROPOGON MELAXANTHUS. 
Neuropogon melaxanthus Nyl. Nyl. Syn., p. 272. 
Localities.—From Mount Terror, October 21st, 1903, collected by Dr. Wilson’s 
party. The same box contains a second label with “ Mount Terror, October 27th—-28th, 
1903, collected by E. A. Wilson,” on it. ‘‘ Cape Royds, on rocks at altitude 1500 feet 
(Erebus), January 11th, 1904, H. T. F.” In both cases the substratum was basic 
scoriaceous lava. 
Notes.—This plant is common in the Arctic and Antarctic regions, and also in 
New Zealand. It is recorded for the Antarctic continent by MM. Fries (Borchgrevink, 
p- 208), Wainio (Belgica, p. 11), Hue (Charcot, no. 5), and by myself (8. Orkneys, p. 2). 
Prof. Blackman (‘Southern Cross,’ p. 320) mentions Neuropogon Taylori Nyl. as 
occurring on Geikie Land. Through the kindness of Dr. Rendle, I was enabled to 
examine the specimens, on the strength of which this determination has been made. 
I have no doubt that they belong to Mewropogon melazanthus Nyl. 
RINODINA TURFACEA. 
Rinodina turfacea (Wnbg.) Th. Fr. Th. Fries, Lich. Scand., p. 195. 
Locality.—Land close about Winter Quarters, December 15th, 1903, over moss 
on earth. 
Notes.—This species occurs in northern America and Europe. It has been 
recorded for the Antarctic by myself (8. Orkneys, p. 2). 
BUELLIA FRIGIDA. 
(Plate I., fig. 4.) 
Localities. —Granite Harbour, McMurdo Bay, January 20th, 1902, on dark basic 
tuff. Some other specimens (localities not recorded) were found on felspar porphyry. 
Diagnosis.—Crusta crassa, fusco-cinerea, continua aut saepius discontinua, et 
macula formans minuta, rimoso-diffracta, et saepius quasi tuberculoso-granulosa, 
margine obscuriori et effigurato distincto, hypothallo discreto ; apothecia nigra, primum 
thallo immersa, marginata, demum emergentia, immarginata, plana vel convexa, 
-5-1°0 mm. lata; epithecium carbonaceum aut rarius (in eadem specimine) decolor ; 
hypothecium obscure fuscescens aut rarius decolor vel carbonaceum ; apothecia rarius 
amphithecio (Rinodinae speciei simili) gonidia continenti instructa ; sed maturiora 
semper amphithecio non cincta ; sporae octonae, fuscae, bicellulares, ‘009-°015 mm. 
2b 2 
