LICHENOLOGY OF ICELAND 117 
L. uliginosa Schrad. (D. B., p. 213). 
Greenland. G. Brit. 
L. vernalis (L.) Ach. (D. B., p. 213). 
Greenland. G. Brit. 
Rhizocarpon. 
R. alboatrum Th. Fr. v. epipolia Ach. (D. B., p.218, Buellia). 
Not found in Greenland. G. Brit. 
R. calcareum Weis. (D. B., p. 218, Buellia). 
Greenland. G. Brit. 
R. geminatum (Fw.) Th. Fr. (D. B., p.218, Buellia). 
Greenland. G. Brit. 
R. geographicum (L.) D.C. (D. B., p. 218, Buellia). 
Greenland. G. Brit. 
R. petraeum Wulfen. (D. B., p. 218, Buellia, including the species 
R. grande Arn., distinctum Th. Fr., obscuratum Th. Fr.). 
R. viridiatrum Flik. (D. B., p. 218, Buellia). 
Not found in Greenland. G. Brit. 
Catillaria. 
C. athallina (Hepp.) Hellb. 
On earth near Einarstadir parsonage, N. Iceland, O. Gallge, 1913. 
New to Iceland. 
C. cumulata Sommerf. (D. B., p. 216, Gyalecta). 
Greenland. G. Brit. 
C. Jemtlandica Th. Fr. (D. B., p. 216, Gyalecta). 
C. tenticularis Ach. (D. B., p. 216, Gyalecta). 
Not found in Greenland. G. Brit. 
Lopadium. 
L. fuscoluteum Dicks. (D. B., p. 218, Buellia). 
Greenland. G. Brit. 
L. pezizoideum (Ach.) Koerb. (D. B., p. 218, Buellia). 
Greenland. G. Brit. 
Toninia. 
T. squalida (Ach.) Nyl. (D. B., p. 216, Gyalecta squarrosa). 
Greenland. G. Brit. 
T. syncomista (Flk.) Th. Fr. (D. B., Gyalecta). 
Greenland. G. Brit. 
T. vesicularis Hoffm. (D. B., p.215, Gyalecta). 
G. Brit. 
