128 Scientific Proceedings^ Royal Dublin Society. 



f. demissa is most often found with L. Hageni f. cakigena, and they usually 

 occur at a lower level on the shore, being associated on Broad Strand 

 with V. maura in some places. 



*Leeanora (R.) subexigua Nyl. — On limestone rocks above high-water 

 mark, Balscadden, and on quartzites on the Broad Strand, associated 

 with BuelUa myriocarpa and L. exigua; rare. The specimens in 

 Crombie's herbarium in the British Museum have a rather more con- 

 tinuous thallus and slightly smaller apotheoia, but the entire thick wall 

 of the apothecium of the Howth specimens and the measurements of 

 the spores, which are consistently 12-15/t x G/n, agree with Crombie's 

 description of the species. Previously known in the British Isles only 

 from S.W. England. 



fL. (R.) confragosa Nyl. — Occasionally on hard quartzites at high levels, Red 

 Rocks ; more frequent on the east coast, but seldom growing inside our 

 area. The Howth specimens agree well with Ournow's plant from the 

 Lizard collected in 1873, which was erroneously recorded as subsp. 

 crassescens, but placed by Crombie under L. confragosa. 



fL. (R.) milvina Ach. — On schistose rocks at base of the earth-banks, Broad 

 Strand, associated with Acarosjwra henedarensis; rare. 



fLecanora galactina Ach. — On walls about Sutton, Balscadden, and Howth 

 Harbour, associated with L. citrina ; very abundant. 

 L. subfusca Nyl. — On old wooden palings, EarlsclifEe; rare. 



var. campestris Nyl. — Frequent on stones and rocks lying at ttie 

 base of the earth-banks, Broad Strand. 



fL. rugosa Nyl., subsp. chlarona Nyl. — On Blackthorns, Earlscliffe ; rare. 



tL. atrynea Nyl. — On rocks amongst Ramalina growths at Sheep Hole ; rare. 

 L. coilocarpa Nyl.— On rocks, Slieep Hole; rare. 



fL. albella Ach. — On Blackthorns, Earlscliffe ; rare. 



fL. angulosa Ach. — On Blackthorns, Earlscliffe; rare. 

 L. glaucoma Ach. — Very widespread on the Howth Peninsula and common 

 inside our area, especially along the east coast. It is usually asso- 

 ciated with Rhizocarpon geographicum, and is frequently infested by 

 Leciographa glaucomaria. 



f, decussata Cromb. — In several places on the east coast, 

 f. complanata Leight. — On slate rocks, Kilrock. 



* var. inflexa Johns. — With the species, but in more shady situations, 



White Water Brook. 



fL. umbrina Nyl. — On rocks about high-water mark. Broad Strand, and at 

 other places on the south coast, also on stones lying level with the soil, 

 Earlscliffe ; frequent. 



I 



