402 
80. D. hapalidioides (Crn.) Fosl. 
On a Patella shell. 
Sporangia in May. 
Syd.: Kvanhauge (Ostenfeld). 
81. D. Corallinse (Crn.) Fosl. 
Epiphytic on Corallina officinalis. Sporangia in November. 
Appears to be rather commonly distributed. 
CORALLINA (Tourn.) Lamour. 
82. Corallina officinalis L. Kjellm., N. I., p. 114 (86). 
I think by far the greater part of the Faeroese material may be 
referred to f .typica; only some material from Trangisvaag gathered 
by Ostenfeld seems to correspond fairly closely to f. flexilis 
Kjellm. (l.c.). 
This species grows on rocks and stones near low-water mark 
and often extends thence to a depth of 1—2 fathoms. It is very 
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 algae, especially 
Lomentaria articulata and Gigartina. This does not correspond with 
Kj ell man’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 Faeroes, 
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 fact it is also fairly common 
in sheltered places. 
Luxuriant specimens bearing tetraspores were found in May 
and June. 
This is an extremely common species of the Faeroese coasts. It 
was already found by Landt (p.292). 
HILDENBRANDIA Nardo. 
83. H. rosea Kiitz. Kjellm., N. I., p. 179 (139). 
Along the coasts of the Faeroes it is extremely common in the 
littoral zone, where it is found covering rocks and stones. It often 
