120 OLAF C.ALL0E 



ACAROSPOUACEJ:. 



(Acarospora, Biatorella). 



Acarospora. 



Ac. discreta (Ach.) Th. Fr. 



Pebbles and firm rock near Husavik. X. Ireland, O. (ialloe, 1913. 

 Ne\v to Iceland. 



Ac. fuscata (Schrad.) Th. Fr. (D. B., p. 212, Ac. fuse. v. rufescens). 

 Not found in Greenland. G. Brit. 



Ac. Heppii (Naeg.) Koerb. 



On basalt, Seydisfjord in K. Iceland; on lava, Havnefjord in S\V. 

 Iceland; O. Gall0e, 1913. New to Iceland. 



Biatorella. 



B. Morio Flk. with var. pallescens. (D. B., p. 218). 

 Greenland. G. Brit. 



EPHEBACEJ: 



(Ephebe, Polychidium). 



Ephebe. 



E. pubescens L. (D. B., p. 202). 

 G. Brit. 



Polychidium. 



P. muscicola Sw. (1). B., p. 206). 

 Not found in Greenland. G. Brit. 



LICHINACE^E. 

 (Lichina). 



Lichina. 



L. confinis O. F. Mullcr (I). B., p. 202). 

 Greenland. G. Brit. 



COLLEMACE.E. 



(Collema, Leptogiuni). 



Collema. 



C. crispum L. (1). B., p. 206). 

 Not found in Greenland. G. Brit. 



C. flaccidum Ach. (D. B., p. 206, Synechoblastus). 



Greenland. G. Brit. 



