LICHENOLOGICAL MEMORABILIA, No. 9. 

 By The Rev. W. A. Leiguton, B.A, Camb., F.L.S., &c. 



NEW IRISH LICHENS. 



In June, 1875, Mr. Larbalestier sent me collections of Lichens 

 made by liim in Connemara, a district of the west of Ireland, which 

 has been hitherto scarcely at all examined with respect to Lichens. 

 Mr. Larbalestier has most kindly included even the commoner 

 species, which renders his communications still more valuable, as 

 enabling us to add to our knowledge of their geographical dis- 

 tribution. Amongst them I detected the following, which I 

 believe are new species, and communicated my determinations to 

 Mr. Larbalestier (in litt.) the same month : — 



1. Verrucaria succina, Leiglit. 



Thallus fuscescent, thin, effuse, scarcely, if at all, surrounding 

 the base of the apothecia ; apothecia numerous, large, amber- 

 colour, hemispherico-conical, papillate ; perithecium amber-colour 

 throughout, dimidiate, spreading at the base ; epithecium minute, 

 poriform ; paraphyses very delicate and slender; asci lineari- 

 clavate ; spores 8, colourless, broadly fusiform. 7-septate, large. 



On rocks near the lake, Kylemore, county Galway (1875). Air. 

 Larbalestier. Very rare. 



The apothecia when wet become of a beautiful tr^insparent 

 amber-colour. Iodine has very slight, if any, reaction on the asci 

 and spores. Its nearest ally would seem to be V. illinita, NyL.,but 

 that species differs in having a whitisb thallus, nigricant apothecia, 

 the perithecium colourless in lower i)art and fuscous in the upper 

 part, and iodine turning the asci and spores of a dirty deep brown, 

 and is also a corticolar lichen. Our lichen differs also in the size and 

 colour of the apothecia from V. chlorotica, which is associated on 

 the same rock, and which has also smaller 3-septatefusiform spores. 



2. Iiecidea excelsa, LeigJit. 



Thallus whitish, slightly shining, thin, effuse, areolato rimulose, 

 subdiffiact, areolae plane and flat (K yellow, C yellow) •, apothecia 

 bluish-black, large, innato-sessile or sessile, plane or slightly 

 concave, very slightly pruinose ; margin thickish, prominent, 

 darker; hypothecium nigro- fuscous ; paraphyses indistinct ; spores 

 8, fuligineo-fuscous, oblong, 1-septate, small. 



On the summit of Kylemore Mountains, county Galway. 3Ir. 

 Larbalestier (June, 1875), rare. 



3. Lecidea livescens, Leight. 



Thallus white, granulose or granulato-verrucose ; granules 



scattered and dispersed (K — C pale reddish) ; hypothallus very 



. black and predominating ; apothecia scattered, arising from the 



