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 rnelaxanthus 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 llth, 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 (S. 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 Neuropogon rnelaxanthus Nyl. 



BJNODINA TURFACEA. 

 Rinodina turfacea (Wnbg.J 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 (S. 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 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. 



2 E 2 



