402 



80. D. hapalidioides (Crn.) Fosl. 

 On a Pafella shell. 

 Sporangia in Mav. 



Syd.: Kvanhauge Ostenfeld). 



81. D. Coralliriæ (Crn.) Fosl. 



Epiphytic on Corallina officinalis. Sporangia in November. 

 Appears to be rather commonly distrihuted. 



CORALLINA (Tourn.) Lamour. 



82. Corallina officinalis L. Kjellm., N. I., p. 114 (86). 



I think by far the greater part of the Færoese material may be 

 referred to f. typica ; only some material from Trangisvaag gathered 

 by Ostenfeld seems to correspond fairly closely to f. flexilis 

 Kjellm. (1. c). 



This species gro\vs on rocks and stones near low-water mark 

 and often extends thence to a depth of 1 — 2 fathoms. It is verv 

 common in rock-pools between tide-marks. On low-lying, gently 

 inclined surfaces of rocks it often forms extensive growths which 

 are characterized by the intermixture of certain algæ, especially 

 Lomentaria articulata and Gigartina. This does not correspond with 

 Kjellman's statement that it mostly grows »dispersed or in small, 

 close groups.« Neither does his statement that »it prefers sheltered 

 localities« apply to the actual conditions on the shores of the Færoes, 

 where the species grows and attains to its highest development in the 

 most exposed localities; as an example I may mention »Muletangen« 

 (tongue of land resembling a muzzle) near Vaags Ejde on Syd., a 

 peculiarly exposed point. Corallina forms here a vast growth which 

 extends some distance out of the sea up on the gently sloping 

 rocks. Of course I do not say that Corallina officinalis grows 

 exclusively in exposed localities, in faet it is also fairly common 

 in sheltered piaces. 



Luxuriant specimens bearing tetraspores were found in May 



and June. 



This is an extremely common species of the Færoese coasts. It 

 was already found by Landt (p. 292). 



IIILDENBRANDIA Nardo. 



83. H. rosea Kiitz. Kjellm., N. I., p. 179 (139). 

 Along the coasts of the Færoes it is extremely common in the 

 littoral zone, where it is found covering rocks and stones. It often 



