336 



188. P. intepcedens (Nyl.), P. Injperborea Th. Fr. 



On rocks. Stromo: Skjællingfjæld (!), ravine near Vestmanhavn (!); 

 Sydero: Famievatn (!); Vaago: Sorvaagsvatn (!). 



189. Microglena corrosa (Koerb.), Verriicaria gibhosiila Nyl. 



On rocks. Sydero: Famievatn (!). Hardly diflering from M. re- 

 diicla Th. Fr. 



190. Thelocappon epiboloides Nyl. 



On the tiiallus of Sphyridiiim byssoides at Kvalbo on Sydero (R.). 

 »Est tantum formå Th. epibol.' Nyl. 



191. Endococcus erraticus (Mass.). 



On the thailus of various Lecideas (R., !). 



192. E. gemmifer (Tayl.). 



On Buellia badioatra at Thorshavn (R.). 



III. Epiconiaceae. 



193 (a). Sphaerophon coralloides Pers. 



On rocks and ground. Rather common, but seldom vigorous (R., !). 

 The blue reaction of the medulla when treated with iodine is 

 usually faint or dubious. 



194 (b). S. fragile Pers. 



Often with the above, especially on the mountains (R., !). 



When the preceding species — those that are numbered — 

 are summed up, the whole number amounts to 194. About a dozen 

 of the 142 species mentioned in Rostrup's list are excluded from 

 my present list, either because they are parasites or because they 

 must be regarded as varieties. If we follow Th. Fries in his limi- 

 tation of species, the number of Færoese species will amounl to 

 about 220, while if Nylander and Crombie be followed the total 

 sum will amount to about 300. 



GENERAL REMARKS ON THE LICHEN -VEGETATION. 



What strikes us most with regard to the fruticulose and folio- 

 lose species — especialh^ with those growing on the ground — 

 is that they seldom attain their normal size and development; 

 they rarely occur in large tufts, but generally have a rather 

 stunted look as of piants living under unfavourable conditions. 



