124 Scientific Proceedings, Royal Dublin Society. 



P. omphalodes Ach. — Rocks, Tare on west coast, common on the east coast in 



the Ramalina belt. 

 P, caperata Ach. — On rocks chiefly in shade, Worn Hole, Drumleck and 



Casana ; not common in our area. 

 P. conspersa Aeli. — Abundant all round the headland, descending to sea- 

 level on the east and north coasts. 

 fP. Mougeotii Schaer. — On Red Rocks and occasionally on rocks by the 



Cliff-walk on the east coast ; rare in our area. 

 fP. exasperata Nyl. — On Blackthorns, Earlscliffe ; rare. 

 P. prolixa Nyl. — General round the coast. 



fsubsp. Delisei Nyl. var. isidiascens Nyl. — On shady rocks with the 

 species, Grienaveena. 

 fP. fuliginosa Nyl. — Frequent all round the coast. 

 P. physodes Ach. — Occasionally found along the upper edge of the cliffs on 

 heather stems and on rocks ; tliough abundant on the peninsula, it is not 

 often found inside our area. 



f. labrosa Ach. — Drumleck Point, and at several places on the east 

 coast. 



Tribe Peltigerei. 



Peltigera canina Hoffm. — Grassy slopes, Casana ; very scarce in our area. 

 P. rufeseens Hoffm. — Wliite Water Brook, on rocks in shady situations ; 

 rare in our area. 



Tribe Physciei. 



Physcia parietina De Not. — General and abundant on rocks all round the 

 coast. Tliis species was seen growing on the root-stalks of Thrift at 

 Old Boat-house, and over the stems and leaves of the same plant at 

 Glenaveena. 



f. virescens Nyl. — On rocks in shady situations, Gaskin's Leap, and 

 at several other places on east coast ; frequent and usually barren. 

 *var. aureola Nyl. — On rocks v^ith the species, Lion's Head. 

 fvar. ectanea Nyl. — Abundant on dry sunny rocks near the Needles. 

 Ph. lychnea Nyl. — Abundant on Blackthorns between Hippy Hole and 

 Lion's Head ; fertile except in deep shade. 

 fPh. leucomela Mich. — On the ground, associated with Cladonia cerviconiis 

 and various mosses, Earlscliffe ; rare. 

 Ph. pulverulenta Nyl. — On Blackthorns, Earlscliffe; rare. 

 Ph. aquila Nyl. — On rocks, chiefly in shade, in the Ramalina belt; very 

 common. 



