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LICHENOLOGY OF ICELAND 12 
CALOPLACACEE. 
(Caloplaca). 
Caloplaca. 
C. aurantiaca Lightf. (D. B., p. 208, Placodium). 
G. Brit. 
C. cerina (Ehrh.) Th. Fr. (D. B., p.207, Placodium cer. f. stilli- 
cidiorum). 
Greenland. G. Brit. 
C. citrina Ach. (D. B., p. 208, Placodium). 
G. Brit. 
C. diphyes Nyl. (D. B., p.208, Placodium). 
Not found in Greenland. 
C. elegans (Link) Th. Fr. (D. B., p. 205, Xanthoria). 
Greenland. G. Brit. 
C. ferruginea (Huds.) Th. Fr. v. obscura Th. Fr. (D. B., p. 208, 
Placodium). 
Greenland. G. Brit. 
C. Jungermanniæ (Vahl) Th. Fr. (D. B., p. 208, Placodium jung. 
and var. leucoraeum). 
Greenland. 
C. murorum Hoffm. with var. miniatum Ach. and obliteratum Pers. 
(D. B., p. 207, Placodium). 
C. nivale Koerb. (D. B., p. 208, Placodium). 
G. Brit. 
C. obscurella Lahm. (D. B., p.208, Placodium). 
Not found in Greenland. 
C. pyracea (Ach.) Th. Fr. (D. B., p. 208, Placodium). 
Greenland. G. Brit. 
C. tetraspora Nyl. (D. B., p.208, Placodium). 
Not found in Greenland. 
C. vitellina (Ehrh.) Th. Fr. (D. B., p.207, Placodium). 
Greenland. G. Brit. 
THELOSCHISTACEE. 
(Xanthoria). 
Xanthoria. 
X. lychnea (Ach.) Th. Fr. (D. B., p. 205, X. par. v. lychnea). 
Greenland. G. Brit. 
X. parietina L. (D.B., p. 205). 
Greenland. G. Brit. 
