PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 7 



Ijecidea enteroleuca, Fr. var. latypea (Ach.) Nyl. 



Lecidea spMota, Fr. 



Cape Lisbarne, Arctic Ocean. 



Spores simple, ellipsoid or oblong 9-11 mic. long x 4-6 wide. 



Ijecidea fuscoatra, Fr. 



Lecidea panaeola (Ach.) Fr. 



Cheruofski Bay, Unalashka Island. 



Spores large, in one instance as much as 27 mic. long by 22 broad, 

 simjile, colorless, or slightly tinged with dark, somewhat smoky-hued. 

 In Mr. Willey'S notes I find he gives spores 23-30 mic. long x 11-16 

 wide. The epispore is very large and distinct. 



BueUia atro-alba (Fr.)- 



St. Paul's Island. Unalashka Island. Plover Bay, Siberia. 



Spores 16-23 mic. long x 11-13 wide, blackish-brown, (among them 

 were a number of well-formed and colored spores api^arently of this 

 species only 12 x 7 mic). 



Buellia atro-alba, Fr. var. chlorospora, Nyl. 

 Chamisso Island in Arctic Ocean. 

 Spores uniseptate, colorless, 18-23 mic. long x 11-13 wide. 



Buellia parasema (Ach.) Khr. 



Port Clarence, Alaska. Plover Bay, Siberia. 



Spores 16-19 mic. x o-S, brown, uniseptate, 2-nucleated. 



Buellia myriocarpa (DC), Mudd. 



Port Clarence, Alaska. 



Spores 9-16 mic. long x 4-8 wide, oblong, brownish, uniseptate and 

 with a distinct epispore. 



Buellia albo-atra (Hoffm., Nyl.) Th. Fr. 



Unalashka. 



Tuckerman (Gen. Lich., p. 188) writes of this species that it '• mediates 

 satisfactorily between the bi-quadrilocular B. parasema and papiUata^ 



and the distinctly uniform-multiloculari?. oidalea." B. albo-atra, ''the 



regularly quadrilocular spores of which soon exhibit plain indications of 

 the next or muriform moditication, is not uncommon." Spores brown, 

 usually 4-celled, sometimes 3-, or even 2-celled, oval to oblong, 11-19 

 mic. long x 8 mic. wide. 



Buellia alpicola (Nyl.) Anz. 



Head of Plover Bay, East Siberia. 



The solitary satisfactory spore I have been able to obtain was 25 

 mic. long x 10 mic. wide, brown and uniseptate. I had supposed it 



