65 ANGIOCARPOUS LICHENS. 



as thick and consistent as that of V. umhrina, but dif- 

 fering from the rimulose thallus of that plant, in being 

 perfectly continuous and entire. In very aged and de- 

 caying specimens the thallus becomes blackened, very 

 minutely cracked, rugged and friable. 



The denuded state of this plant must not, however, be 

 confounded with V. codonoidea, in which the denuded 

 or film-like thallus, and apothecia half the size or less, 

 are at first sight similar. The difi*erent sporidia separate 

 them. 



33. V. IRRIGUA, Tai/l. Sporidia in asci 8, fusiform, tri- 



septate, pale yellow. Plate XXIV. figs. 4 & 6. 



Verbucabia IRRIGUA, Tayl. Fl. Hib. p. ii. 95. (183G.) 



Dargle river, Co. Wicklow ! Dr. Taylor, in herb. 

 Borrer. Arddog ! Hev. T. Bahoey, in herb. Borrer. 

 Khaidyr Mowddach ! Bev. T. Salwey, 



Notwithstanding that the perithecium is more spreading 

 at the base than in V. erysiboda, Fl. Hib. 98 (specimen 

 examined from Carig, Kerry 1 Br. Taylor, in herb. Borrer. 

 see Plate XXIV. fig. 6), yet the sporidia being pre- 

 cisely similar, I incline to think that they may be states 

 of tlie same species. V. rubiyi7iosa (PL Hib. 94) is also 

 probably identical, but I have not had an opportunity of 

 examining any specimen. The red coloured perithecium 

 is remarkable in all. I adopt the name irriyua for the 

 species, merely because it stands first in Dr. Taylor's 

 work. 



* * * Berithecium spreading at the base. 

 t Inner tunic black. 



34. V. suBALBiCANS, nov. sp, Sporidia in asci 8, elliptical 



or oblong, margined, pale yellow. Plate XXV. fig. 1 . 



Sussex ! Mr. Borrer. 



