fi O. V. DARBISHIRE. 



Notes. — This new species was found in tlie smallest interstices of lava. The 

 specimens arc hardly visil>le, and they owe their discovery to the presence of a yellow 

 lichen, which has however remained undetermined. The thallu.s consists mainly of a 

 few granular masses of sterile tissue containing gonidia, which arc overshadowed by 

 the apothecia which are almost stalked. These act also as assimilators, as they possess 

 a- dense layer of gonidia underneath the hypothecium, 



Lecanora polytropa* 



Leranora pnhjtropa (Ehrli.) Nyl. Th. Fries. Licli. Scand., p. 2.')9. 



Localiti,'s.—i\mn\iG Harbour, January 20th, 1902, on dark ])asic tufV. Summit 

 of Observation Hill, Winter Harliour, December 27th, 1902, on light acid volcanic a.sh. 



Notefi.—Tha specimens from Observation Hill are just a bit doubtful. This 

 species is almost cosmopolitan, and has been recorded from the Antarctic by M. Waiuio 

 (Belgicii, p. 19). 



Lecanora subfusca. 



Lecanora subfusca (L.) Acli. Th. Fries, Licb. Scan<l., p. 2-^X. 



Locality. — " Lichen from ridge of West Mountains at highest point we reached, 

 5000 feet, December 15th, 1902, Western Sledge Journey, collected by Skeltou," 

 on granite. 



Notes. — I am not at all certain that the specimens before me really l)elong to 

 Lecanora suhfusca. The material from this locality included some lichens that were 

 quite indeterminable. It is however of first importance to find lichens at all in such 

 a locality. The species is widely distributed and almost cosmopolit^m. 



Parmelia quarta. 



(Plate L, fig. 5.) 



LocalitT/.—Gramtc Harbour, McMurdo Bay, January 20th. 1902. on dark l)asic 

 volcanic ash. 



Z)/«///((w/.s-.— Thallus 5-10 mm. latus, 3-4 mm. altus, peltatus-affixus, convolutus, 

 superne apotheciis nigricans vcl coeruleo-nigricans, sed partibus apotheciis desti tutus et 

 marginc pallidior, inferne pallidior nudus et albidus, superne et inferne plentendiy- 

 matice corticatus ; medulla laxe stupposa, .sed ad umbilicum firma ; gonidia proto- 

 coccoidea ; apothecia parmeleina ; epithecium coeruleo-nigricans ; parathecium decolor ; 

 hypothecium decok)r sed gonidiis instructum nufherosis ; asci vcntrico.si ; .sporac 

 4-8nac, hyalinae, .simplices, octonae, -0075- -008 mm. longae et -0065- -0075 mm. 

 lative, <iuaternae, -010 mm. longae et -0075 mm. latae. Hal>itat ad saxa vulcanica. 



iV(»/(>-.— I think there can be no doubt that this is a new species, and tliat it 

 belongs to Parmdia. The well-developed cortex above and below .separate it from 

 any species of Squamaria. The cortex in each case consists of laanchiug cell-rows 



