439 



it occurs in the littoral zone, and has been met with near high- 

 water mark, where it mav often be found in a completely dried 

 up state. 



It grows gregariously on rocks. 



It was gathered in May and October, well-developed specimens 

 occurring in both these montiis. 



Fructifying piants were found in Mav. 



In Fær. FL p. 86 Rostrup mentions ;i f. fili formis of Phyllitis fascia, 

 but the specimen in his herbarium bearing this mime has proved to 

 be Ph. zosterifolia. 



It has hitherto been found in the foUowing piaces only: Vid.: 

 Viderejde !); Ost: Solmunde (H. J. ; Str.: The east coast (Rostrup). 



SCYTOSIPHON (Ag.) Thur. 



127. S. lomentarius (Lyngb.) J. Ag. Kjellm., N. I., p. 320 (258); 

 Chorda lomentaria Lyngb., Hydrophyt, p. 74. 



Specimens occurred both with and without constrictions. This 

 species grows on rocks in the littoral zone and is met with in 

 sheltered but more especially in exposed localities. In the latter 

 il can occur fairly near high-water mark (e. g. in much exposed 

 localities near Mjovenæs [Ost.], and on Myggenæs it grew near 

 or even somewhat above high-water mark) where it grows by pre- 

 ference in slight depressions in the rock containing a little water 

 left by the receding tide, but it also occurs on sloping rock surfaces 

 where it is left quite dry. In sheltered localities where tides are 

 not felt it grows in shallow water, especially on stony bottoms. 

 It mav extend far into the fjords and can hear a strong admixture 

 of fresh-water. 



In Vaagfjord it was found epiphytic on Zostera. 



Specimens gathered in April were still sterile. Fructifying piants 

 were found in May, June, July and it doubtless keeps on fruc- 

 tifying till late in autnmn. 



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

 as was pointed out by Lyngbye: — »Habitat in infimo refluxus limite 

 ad littora Færoensia, ut ad Qvivig, copiose«. 



LITOSIPHON Harv. 



128. L. Laminariæ (Lyngb.) Harv., Manual of the Brit. Mar. Alg., 

 p. 43; Bangia Laminariæ Lyngb., Hydrophyt., p. 84. 



This species grows on the leaves of Alarici esculenta, in the 

 tissue of which the creeping filaments occur, and it frequently forms 



