THE PLANTS OF THE PRIBILOF ISLANDS ' 583 



Thamnolia vermicularis, Fr. 



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

 rocks, St. Paul Island. 



Normandia laetevirens, Turn, and Borr. 



Among tnfts of moss, on St. George Island. ' . 



Heterothecium sanguiiiariuni, (L.), Flot. 

 On rocks on both islands. 



Lecidea sp. (?). 



On rocks, St. George Island. 

 Iiecidea sp. (?). 



On rocks, St. George Island. 



Buellia geograpliica, (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. 

 Pycnothalia cladinoides, Nyl. 

 Cladonia rangiferina, Hoffm. 

 Cladonia papillaria, Hoftm. 

 Theeloschistes lychneus, Nyl. 

 TJmbilioaria hyporea, Hoffm. 

 Stereocaulon ooralloides, Fr. 

 Cladonia fimbriata, Fr. 

 Leoanora 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. 



