MCIIENES. 7 



ruDoing at riglit iiugle.s to tlie surface of the tliallus. The phiiit appears as a .small 

 dark convolute lichen on a grey background of solidified volcanic ash, tlie most bleak 

 substratum one can imagine. 



NeUROPOGON MELAXANTHUvS. 

 Neiiropogoii melaxanthun 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 

 (Erebu.s), January 11th, 1904,11. T. F." In both cases the substratum was basic 

 scoriaceous lava. 



Notes. — This plant is common in the Ar<;tic and Antarctic regions, and also in 

 New Zealand. It is recorded for the Antarctic continent by MM. Fries (Borchgreviiik, 

 p. 208), Wainio (Belgica, p. 11), Hue (Charcot, no. 5), and by myself (S. Orkneys, p. 2). 

 Prof. Blackman (' Southern Cross,^ p. 320) mentions NeurojHxjon 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 melaxantkus Nyl. 



RiNODINA TURFACEA. 

 Rinodina turfacea (Wnbg.) Th. Fr. Th. Fries, Lich. Scand., p. 195. 



Locality. — Land close about Winter Quarters, Deceml)er 15th, 1903, over mo.ss 

 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 L, fig. 4.) 



Localities.— (ir&nite Harboui-, McMurdo Bay, January 20th, 1902, on dark basic 

 tuff. Some other specimens (localities not recorded) were found (ju felspar porphyry. 



Diagnosis. — Crusta crassa, fi^sco-cinerea, continua aut saepius discontinua, et 

 macula formans minuta, rimo.so-diffracta, et saopius (juasi tuborculo.so-granulosa, 

 margiue ob.scuriori et ctKgurato distincto, hypothallo discrcto ; apotliccia nigra, priraum 

 thallo immersa, marginata, demum emergentia, immarginata, plana vel convexa, 

 •5-1 "0 mm. lata; epithccium carbonaceum aut rarius (in eadem .spccimine) decolor ; 

 hypothecium obscure fu.sce.scens aut rarius decolor vel carbonaceum ; apothecia rarius 

 amphithecio (Rinodinac speciei simili) gonidia continenti instructa ; sed maturiora 

 semper amphithecio non cincta ; sporae octonac, fuscac, bicellulares, •009-'015 mm. 



2 K 2 



