1 30 NATTTEAL HISTORY SOCIETY OF DUBLIN - . 



Opegbapha (HumbX 

 No. 144. — Opegrapha atra (Pers.). Demesne, Armagh. T. J. 

 A state. 



No. 159. — Demesne, Armagh. T.J. 

 No. 171 Demesne, Armagh. T. J. 



No. 282. — Opegrapha atra, var. paralella (LeightX Castle Barnard. 

 T.J. 



No. 12. — Opegrapha Chevalieri (Leight). Barclay's Bock, Co. Down. 

 T.J. 



No. 112. — Opegrapha epiphega (AchX Curraghmore. T. J. 



It seems generally agreed that this plant 

 is not a true Lichen ; there are no go- 

 nidia ; both forms of fructification are 

 present. The plant in its young state 

 exteriorly resembles Hysterium. 



*No. 342. — Opegrapha herpetica (AchX Demesne, Armagh. On birch. 

 T.J. 

 See 206. This plant was named by Mr. 

 Carroll. 



*No. 235. — Opegrapha involuta (WallrX Castle Barnard. T. J. 



Named by Nylander.* 



No. 340. — Opegrapha Persoonii (AchX On rocks, Sheepwalk, Armagh. 

 T.J. 

 See my Nos. 1232, 1591. 



No. 166.— Opegrapha rupestris (PersX Sheepwalk, Armagh. T. J. 



No. 341. — Glenarm, on chalk rock. T. J. 



See No. 1548. There are slight external 

 differences between this and the last 

 plant ; but they must be taken as forms 

 of the same plant. 



No. 89. — Opegrapha varia (PersX Demesne, Armagh. T. J. 



No. 99. — Form. Demesne, Armagh. T. J. 

 These two pieces (No. 99) have on them a 

 mixture of Lichens; two of Opegrapha — 

 0. varia and 0. herpetica, and second 

 forms of fructification; but all mixed 

 and confused. 0. varia is the object, 

 and it is best displayed in the smaller 

 piece. 



See Korber, p. 286. 



