403 



extends far above high-water mark on sloping rock faces in much 

 exposed localities, where it occurs as an undergrowth under other 

 algæ, e. g. Porphyra, Fucaceæ, etc. ; at sucb bigb Ievels it is only 

 reached by the spray. Near Bosdalafos on Vaago it has been found 

 growing some 80 feet above sea-level. It is also very often found 

 covering the sides of rock-pools in association with Ralfsia verrucosa 

 and different species of I Achens. It is always of a fine, dark crimson 

 colour, even when growing in broad daylight, and such bleached, 

 yellowish examples as those which occur along the Danish shores 

 I never met with in the Færoes, owing of course to the sky being 

 so often overcast and perhaps more particularly to the period of 

 sunshine being always so short in the latter place. Rosenvinge 

 (Grønl. Havalg., p. 820) has noticed the same to be the case in 

 Greenland. 



Tetraspore-bearing specimens were found in March, May, June, 

 July, November, December, and it is doubtless able to fructify all 

 the year round. 



This species is extremely common along the coasts of the Færoes. 



B. Phaeophyceae. 



Order ECTOCARPACEAE. 



ECTOCARPUS Lyngb. 



Subgen. Euectocarpus Hauck. 



84. E. confervoides (Roth) Le Jol. Kuckuck, Beitråge zur Kenntnis 

 einiger Ectocarpus-Arten der Kieler Fohrde; Ectocarpus siliculosus 

 Lyngb., Hydrophyt., pp. 131—2, tab. 43 B. 



f. typica Kuckuck, 1. c. 



f. pygmæa (Aresch.) Kjellm., Handb., p. 77. 



The specimens referred to f. typica usually agree fairly well 

 with Kuckuck's figure 3, 1. c. The thickness of the main filaments 

 varies with an average of 27 p. In fig. 60 is shown one of the 

 specimens — gathered at Thorshavn — which I have referred to 

 i. pygmæa; it occurred as a short, densely matted growth on the 

 stem of Laminaria digitata. The erect filaments, which are about 

 12 — 13 (i thick, are sometimes found bearing only one terminal 



Botany of the Færoes. 26 



