272 DUBLIN UNIVERSITY 



(1) Coniops. Lecidea sabuletorum, v. coniops (Schcer., L. H. Exs. 

 193 ! Leight., L. B. Exs. 331 !). L. scabra (Tayl. in Herb. Borr.I). Com- 

 mon on rocks by the coast. 



(2) Crustulata (Flk.). On rocks near Cork. 



(3) Enteroleuca. L. enteroleuca (Schcer., L. H. Exs. 530 !). On 

 trees, frequent ; specimens collected on rocks near Larne, by D. Moore, 

 appear to be the same thing. 



(4). Elaochroma. L. elceochroma (Leight., L. B. Exs. 126!). On 

 trees, very common. 



26. L. atro-alba (FloL). Brandon Mountain, Kerry; D. Moore. 

 Probably frequent. 



• 27. L. badio-atra (Flk.). On rocks by the coast, frequent. 



28. L. stellulata (TayL,Xeight., L. B. Exs. 276 !). Common on rocks. 



29. L. petrcea (Flot.). Very common on rocks. 



Var. concentrica (Dav.). L. petrcea (Schcer., L. H. Exs. 183 !) L. 

 atro-alba, v. concentrica (Leight., L. B. Exs. 17 !) On stones of walls, &c, 

 abundant. 



Var. JEderi. Erequent on high mountains, as in the north of Ire- 

 land (D. Moore), and on Mangerton. This form, Lecidea aderi of 

 authors, appears to be only petraa, having the thallus tinged of a rusty 

 hue with oxide of iron. L. atro-alba, v. atro-albella (Leight., L. B. Exs. 

 184 !) (in my copy) is also petraa. 



30. L. contigua (Fr., Schcer., L. H. Exs. 446 ! Leight., L. B. Exs. 

 155 ! 156 ! 337 !). On rocks, common. 



Var. confiuens (Schcer., L. H. Exs. 187! 188!). 



Var. platycarpa (Kyi., L. P. 141 !). L. platycarpa (Schcer., L. H 

 Exs. 228 !) These vars. also occur, and a third form, resembling L. cal- 

 civora (Ehrh.), occurs on limestone rocks near Glenarm, where it was 

 collected by D. Moore. 



31. L. lapicida (Fr.). North of Ireland; D.Moore, var. silacea, 

 L. silacea (Arch.), frequent on rocks. This lichen is probably common, 

 but is difficult to distinguish from the preceding. 



31*. L. albo-cosrulescen8 (Fr.), var. alpina (Schcer.). Killiney Hill; 

 Admiral Jones. 



32. L. atro-sanguina(Hoffm.). L. immersa, B. atro-sanguinea (Schcer., 

 L. H. Exs. 628 !). Armagh ; Admiral Jones. Erequent near Cork, 

 especially on limestone. 



33. L. calcivora (Ehrh.), (Nyl., L.P. Exs. 138 !). L. immersa, a. calci- 

 vora (Schoer., L. H. Exs. 201 !). On limestone near Blackrock Castle, Cork. 



