REV, W. A. LETGIITON ON A XEW UMBinCAKTA. 83 



7. Lecanoua pyreniospoka, Nyl. Scand. 151, tab. 1. fig. 6; van 

 pauperculoy Nyl.!, ibid. Thallus evanescens; apothecia parva ailpressa, 

 fusca vel fusco-nigia, margine thallino tenui pallido inconspicuo 

 cincta; sporai 8, fusca?, magna?, elongato-oblonga?, l-septatajj qua- 

 driloculares; loculis fere spha?roideis ; paraphyses distiucta;. 



Ad lignum vetustura. New Zealand {Colenso, no. 63G9,inherb, Hooker.). 



The pale lamina proligera rests iu a pale tlialline receptacle 

 filled with gonidia. Solution of iodine turns the gelatina hy- 

 mcuea and the entire lamina proligera of a deep blue, but does 

 not affect the spores. The apothecia resemble old dark sub- 

 lecideine ones of Lecanora varia \ and the spores, both in size and 

 in their cells, liave an approximate resemblance to the spores of 

 Verritcaria nitida^ Schrad. The septum was rather indistinct. 

 The New-Zealand plant is identical with the var. paupercula^ 

 Nyl. ! Lich. Scand. p. 152, of which I possess, and have examined, 

 a specimen received from Dr. Nylandcr himself. 



Plate IV. Fig. 15, section of apothecium, niagn, ; fig. 16, spores, magn. 

 GOO. 



On a new Species of Umhilicarin. 

 By Rev. W. A. LeigHton, B.A., F.L.S. 



(PUITE IV.) 



1 



[Bead May 2, 1867.] 



Amongst a large mass of unarranged lichens belonging to tlie 

 Hookerian herbarium at Kew, collected by Dr. W. J. Burchell 

 in various parts of the globe, and which, by the courtesy of Dr. 

 Hooker, I have been permitted to examine, I have detected a 

 very remarkable and hitherto undescribed species of Umhilicaria, 

 of a very peculiar citrine or flavo-virescent colour, and with spores 

 unusual in this genus. Some few of the specimens were still 

 attached umbilicately to a compact reddish-coloured granitic (?) 

 rock. Unfortunately, very few of Dr. Burchell's specimens had 

 the localities in which they had been collected indicated on their 

 labels or envelopes ; and it has therefore become difficult, if not 

 impossible, to assign them accurately to their proper countries. 



plac 



MS 



LINN. PROC. BOTANY, YOL. X. I> 



