Fink : LICHENS OF THE LAKE SUPERIOR REGION. 223 



19. Urceolaria scruposa (L.) NYL. 



20. Placodium vitellinum (EHRH.) NAEG. and HEPP. 



21. Lecanora rubina (ViLL.) ACH. 



22. Lecanora cinerea (L. ) SOM.MERF. 



23. Buellia petraea (FLOT., KOERB.) TUCK. 



Island number two is in Snowbank lake, 50 feet from the 

 shore, in the N. W. ^ N. E. ^ of Sec. 29, T. 64 N., R. 8 W. 

 near the outlet of the lake. The size of the island is about 

 80 x 100 feet, and it is thickly covered with trees and shrubs 

 except in a few spots where Cladonia rangiferina (L.) Hoffm. 

 persists. The species listed below for this island are excepting 

 the Cladonia ) confined to a circle of rock extending around the 

 island and up from the water three inches to one foot. The 

 species are as follows : 



1. Cladonia rangiferina (L.) HOFFM. 



2. Endocarpon fluviatile DC. 



3. Parmelia conspersa (EHRH.) ACH. 



4. Parmelia caperata (L.) ACH. 



5. Physcia obscura (EHRH.) NYL. 



6. Leptogium lacerum (Sw.) Fr. 



7. Placodium aurantiacum (LIGHT.) NAEG. and HEPP. 



8. Lecanora subfusca (L.) ACH. 



9. Lecanora cinerea (L.) SOMMERF. 



Island number three is in Disappointment lake, about 200 feet 

 from the shore, in the N. E. ^ of the S. E. ^ of S. E. ^ of 

 Sec. 33, T. 64 N., R. 8 W. The size is 50x75 feet. The 

 surface is rocky, with a few small shrubs growing in crevices, 

 and is literally covered with rock lichens, and a few Cladonias 

 and Stereocaulons growing along crevices and beginning to 

 spread in one or two places. The following species were easily 

 detected. 



1. Cladonia rangiferina (L.) HOFFM. 



2. Cladonia rangiferina (L.) HOFFM. var. sylvatica L. 



3. Cladonia pyxidata (L.) FR. 



4. Cladonia uncialis (L.) FR. 



5. Cladonia furcata (Huos.) FR. 



