M13-1914.] g 5 



B. verruculosa Mudd. On rocks, Causeway headlands. 



B. stellulata Mudd. On rocks, Causeway headlands. 



Rhizocarpon alboatrum Th. Fr. On rocks, Benevenagh. 



R, geograpkicum DC. On coarse basalts, Fair Head. 



R. petraeum Massal. On the chalk, Whitepark Bay. 



R. petraeum Massal., var. excentricum A. L. Sm. On basalt 

 at Fair Head and the Causeway. 



R. confervoidcs DC. On basalt, Benevenagh. 



Arthonia gregaria Koerb. On Hazel, Benevenagh. 



A. lapidicola Tayl. On the chalk, Whitepark Bay; a very 

 rare species. 



Opegrapha betulina Sm. On Birch, Benevenagh. 



O. calcarea Turn. On the chalk, Whitepark Bay. 



O. Leightonii Cromb. On the chalk, N. Antrim (Glover). 



Verrucaria maura Wahlenb. On rocks about high water- 

 mark, Causeway. 



V. maura Wahlenb., var. memnonia Koerb. On shady rocks 

 about high water-mark, Causeway. 



V. mucosa Wahlenb. On rocks between neap tide-marks, 

 Causeway. 



V. microspora Nyl. On rocks with V. mucosa, Causeway, 

 and on Carboniferous sandstones with Lichina pygmaea, 

 on the shore at Fair Head. 



V. prominula Nyl., var. minor Nyl. On maritime rocks, 

 Whitepark Bay. 



V. muralis Ach. On stones on the sandhills, Whitepark 

 Bay. 



Polyblastia Schraderi A. L. Sm. On chalk pebbles, White- 

 park Bay (Praeger). 



P. deminuta Am. On chalk pebbles, Whitepark Bay, 

 (Praeger). 



Acrocordia epipolaea A. L. Sm. On the chalk, Whitepark 

 Bay (Glover). 



Arthopyrenia epidermidis Mudd. On Birch, Benevenagh. 



