Bd. IV: il) THE LICHENS. 45 



21. South Shetland Islands, Nelson Island. 



On stone: Lecidea auriculata; Stereocaulon pygmaeum; Diplotomma alboatrum; 

 Placodium murorum, regale; Lecanora badia; Buellia Augusta, Nelsonii; 

 Verrucaria famelica; Mastodia tessellata. 



22. Graham Land, Louis Philippe Peninsula, Hope Harbour. 

 On a feather: Physcia caesia. 



On stone: Bacidia granulosa; Xanthoria lychnea; Placodium elegans, murorum; 

 Lecanora polytropa; Neuropogon melaxanthum; Rinodina crassa; Buellia 

 frigida; Acarospora macrocyclos, molybdina. 



23. Graham Land, Louis Philippe Peninsula, Small Lslet off the coast. 

 On stone: Acarospora molybdina; Mastodia tessellata. 



24. Graham Laud, Louis Philippe Peninsula, Astrolabe Island. 



On stone: Stereocaulon pygmaeum; Acarospora convoluta; Mastodia tessellata. 



25. Graham Land, Gerlache Channel, Cape Flora. 

 Over earth: Cladonia pyxidata. 



On stone: Gyrophora Dillenii; Xanthoria lychnea; Lecanora polytropa; Parmelia 

 saxatilis; Neuropogon melaxanthum. 



26. Graham Laud, Gerlache Channel, AIoss Island. 



Over earth and moss: Sphaerophoron coralloides; Stereocaulon magellanicum; 

 Cladonia coccifera, gracilis, pyxidata, rangiferina, sylvatica; Ochrolechia tar- 

 tarea; Neuropogon melaxanthum; Physcia stellaris; Rinodina turfacea. 



On stone: Xanthoria lychnea. 



27. Graham Land, Gerlache Channel, Challenger Island. 

 Over earth and moss: Physcia stellaris; Rinodina turfacea. 



28. Graham Land, Erebus and Terror Gulf, Paulet Island. 



Over earth and moss: Cladonia pyxidata; Blastenia leucoraea; Caloplaca athel- 

 lina; Neuropogon melaxanthum. 



On stone: Biatora lavae; Gyrophora anthracina, Dillenii; Stereocaulon pygmaeum; 

 Xanthoria lychnea; Placodium elegans, miniatum, murorum, regale; Calo- 

 placa aurantiaca; Lecanora polytropa; Ramalina terebrata; Physcia caesia; 

 Buellia Augusta, frigida, latemarginata, protothallina; Mastodia tessellata. 



Parasitic on Placodium elegans: Didymosphaeria placodiorum. 



