24 ANGIOCARPOUS LICHENS. 



5. S. AGGREGATA, Fries. Sporidia in asci 8, narrow, 



elongated, fusiform, 5-septate, pale. Plate VIII. 



%. 1. 



Lichen obsctjrus, Sm. E. Bot. 1752, (1807.) 

 Sagedia AGGREGATA, Fries. L. Reform. 416. (1831.) 

 Pertusaria crassa, Hook. Br. Fl. ii. 160. (1833.) 

 Verrtjcaria obscura, Ta^l. Fl. Hib. pt. ii. 96. (1836.) 



Sussex ! 3fr. Borrer. On an old yew-tree in Cheriton 

 Churchyard, Pembrokeshire I Bev. 2\ Salwey. 



The tunic of the apothecium is pale, the nucleus white, 

 the ostiolum dark brown, or black. 



6. S. CIRCUMSCRIPTA. Sporidia in asci 8, narrow, clavate, 



5-septate, dark brown. Plate VIII. fig. 2. 



Verrucaria circumscripta, Tayl. Fl. Hib. pt. ii. 96. (1836.) 

 Shaded rocks, Kerry ! Br. Taylor, in herb. Borrer, 



The fJiallus of this singular plant seems formed of 

 anastomosing articulated entangled fibres, with globular 

 bodies, containing granules interspersed. The apothecia 

 are without any true perithecium, that which they possess 

 being fibrous, of an obovate or clavate shape, darkish olive- 

 green towards the summit, paler, and yellow beneath. 

 Though it has most certainly no affinity with Verrucaria, 

 yet it may be questioned whether the present genus is its 

 true arrangement. 



Genus 3. Chiodecton, Fee. 



Apothecium verrucseform, formed of the erumpent me- 

 dullary layer, pulverulent. Nuclei many, aggregated, 

 and immersed in the thallodal warts, ceraceo-gelatinose, 

 supported on the vertical processes or divisions of an 

 opaque blackish-brown torus ; ostiola sub-disciform, dis- 

 tinct, prominent, not perforated ; thallus crustaceous. 



