447 
from East-Finmarken to f. typica , so I am of opinion that all the 
Fseroese specimens may be referred to this form. 
This species grows both on fairly exposed shores and in 
sheltered localities, but is most common in the latter. It generally 
occurs in the sublittoral zone, but not at any considerable depth; 
where the tide is not felt it is common in 1 to 2 feet of water. 
Most frequently it is found attached to stones, but may also occur 
epiphytic on larger algae. 
Sporangia-bearing plants were found in November and De¬ 
cember, but the summer specimens which I have examined were 
sterile. 
This species is quite common along the Faeroese coasts and was 
already found by Lyngbye. 
CASTAGNEA Derb. et Sol. 
140. C. virescens (Carm.) Thur. Le Jobs, Alg. mar. de Cherb., 
p. 85; Eudesme virescens J. G. Ag., Kjellm., N. I., p. 312 (251). 
Found in a sheltered situation in quite shallow water growing 
on stones. It had sporangia in July. 
It appears to be very rare along the coasts of the Faeroes as it 
has been found once only, and in a small quantity, in Sundene on the 
coast of Stromo between Thorsvig and Kvalvig (!). 
LEATHESIA (Gray) J. G. Ag. 
141. L. difformis (L.) Aresch. Kjellm., N. I., p. 313 (252). 
It belongs to the littoral zone and has been mostly met with 
in sheltered localities. It generally occurs as an epiphyte on Co- 
rallina officinalis , but also grows on rocky bottoms. It was found 
bearing plurilocular sporangia in July. 
Found in the following localities: fiost.: Ejde (H.S.), Selletrae (H.S.); 
Str.: Kollefjord (H. S.), Kalbakfjord (!), Thorshavn (H. S.); Syd.: Trangis- 
vaagfjord (H. S.). Simmons, 1. c. p. 270, mentions it on the whole as 
common: — »als Epiphyt in der Corallinaformation, wo sie selten zu 
fehlen scheint«. The reason why Simmons found it so frequently is 
doubtless that it is most luxuriantly developed at the end of summer. 
Order CHORDACEAE. 
CHORDA (Stackh.) Lamour. 
142. Ch. filum (L.) Stackh. Lyngb., Hydrophyt., p. 72; Kjellm., 
N. I., p. 307 (245); Reinke, Atlas, tab. 26—28. 
