THE PLANTS OF THE PRIBILOF ISLANDS 583 



Thamnolia vermicularis, Fr. 



Common on earth on both islands. The form gracilescens is rare on earth on 

 rocks, St. Paul Island. 



Noimandia laetevirens, Turn, and Borr. 



Among tufts of moss, on St. George Island. 



Heterothecium sanguinarium, (L.), Flot. 



On rocks on both islands. 



Lecidea sp. (?). 



On rocks, St. George Island. 



Lecidea sp. ( '. |. 



On rocks, St. George Island. 



Buellia geographica, (L.), Tuck. 



On rocks, St. George Island. 



Buellia alpicola, Wahl. 



On rocks, St. George Island. 



Buellia sp. (•). 



On rocks, St. George Island. 



Verucarria sp. (?). 



On rocks, St. George Island. 



Note. — The chemical reactions, measurements of spores, etc., are by Mr. J. S. D. 

 Branth, of Sneptrup, Denmark. 



LICHENS COLLECTED ON ST. PAUL ISLAND IN 1891 BY WILLIAM PALMER AND 

 DETERMINED BY MR. W. "W. CALKINS. 



Cladonia furcata, Fr. 

 Fycnothalia cladinoides, Nyl. 

 Cladonia rangiferina, Hoffm. 

 Cladonia papillaria, Hoffm. 

 Theeloschistes lychneus, Nyl. 

 TJmbilicaria hyporea, Hoffm. 

 Stereocaulon coralloides, Fr. 

 Cladonia nmbriata, Fr. 

 Lecanora thamnites, Tuck. 



FUNGI. 

 Clitocybe cyathiformis, Fr. 



On earth, St. Paul Island. 

 Clitocybe diatreta, Fr. 



On earth, St. Paul Island. 

 Clitocybe laccata, Scop. 



On earth, St. Paul Island. 

 Russula nigrodisca, Pk. New species. 



Pileus thin, convex or nearly plane, viscid when young and moist, black or black- 

 ish on the disk, purplish-red or dark-red on the even margin; lamellae thin, entire, 

 subdistant, narrowed toward the stem, whitish; stem nearly equal, white or whitish; 

 spores white, subglobose, 0.00035 to 0.00045 inch long; cystidia 0.002 to 0.0024 inch 

 long, pointed at the apex. 



Pileus 1 to 1.5 inches broad ; stem 1 to 1.5 inches long, 2 to 4 lines thick. 



