Dec, 1917] Second List of Lichens 63 



Lecidea contigua convextella (Wainio) Fink. On granite 

 boulder: C. 



Lecidea lactea (Flot.) Schaer. On sandstone: C. 



Lecidea myriocarpoides Nyl. On old wood: L. 



Lecidea pycnocarpa Koerb. On rock (conglomerate) : G, L. 



Placodium pyraceum (Ach.) Fink. On old wood and sand- 

 stone: C. 



Rhizocarpon alboatrum (Hoffm.) Th. Fr. On bark (maple) : O. 



Theloschistes polycarpus (Hoffm.) Tuck. On bark: C. 



