365 



exposed localities where their close growth protects thera from the 

 violence of the sea. 



Tetraspore-bearing piants were found in April, May, .hine and 

 November. 



This is a very common species of the Færoese coasts, as was 

 pointe«! out by Lyngbye (1. c), who writes: -■ »Ad insulas Færoenses 

 co])iosissime, tam lapidibus ad superficiem maris agglutinata, quam stipiti 

 Laminariæ digitatæ aliarumque parasitice insidens.« 



Formå tgpica is most common on rocks, and subforma cæspitosa 

 in exposed piaces on rocks between tide-marks; Simmons mentions 

 having found it near Ejde (Ost.) and Fanden Syd. . Specimens which 

 correspond fairly closely to f. sarniensis occurred between tide-marks in 

 the neighbourhood of Gliversnæs (Str.); f. prolifera and f.typica margini- 

 fera are common as epiphytes; lastly subforma nana was found in a 

 small, low cave near Hojvig (Str.). 



LOMENTARIA Lyngbye. 



27. L. articulata (Huds.) Lyngb., Hydrophyt., p. 101, tab. 30 A.; 

 Hauptfleisch, Die Fruchtentwickelung der Gatungen Chylocladia, 

 Champia und Lomentaria (Flora 1892); Chylocladia articulata (Huds.) 

 Grev., Kjellm., N. I., p. 193 (151). 



A littoral species, generally grows gregariously, and commonly 

 near low-water mark in the Corallina-belt. It prefers exposed 

 coasts, but mav also be met with in sheltered localities, where it 

 does not, however, seem to thrive. It grows attached to rocks and 

 stones and has not been found as an epiphyte. Tetrasporic spe- 

 cimens occurred in May, June, July and November. 



Lyngbye, who first found this species in the Færoes, writes in 

 Hydrophyt., p. 10, with reference to its habitat: -- »Habitat pulchra 

 hæc species ad rupes insularum Færoensium in summo refluxus limite 

 hic et illic eopiose.« The species is also very common, especially along 

 the more exposed coasts. 



28. L. clavellosa (Turn.) Thur. Hauptfleisch, Die Frucht- 

 entvickelung der Gattungen Chylocladia, Champia und Lomentaria 

 (Flora 1892); Chylocladia clavellosa (Turn.) J. Ag., Spec. Alg., Vol. 3, 

 p. 297. 



Var. sedifolia (Turn.) J. Ag., Spec. Alg., vol. 2, p. 366; Gastri- 

 dium purpurascens Lyngb., Hydrophyt., p. 69, tab. 17. 



Almost all the L. clavellosa- specimens from the Færoes belong 

 to the variety 1 , but they vary considerably. In some specimens 



1 I fully agree with Foslie (New or Critical Norwegian Algæ, Kgl. norske 

 Videnskab. Selsk. Skrifter 1894) when he savs that he cannot follow Stromfelt in 

 regarding var. sedifolia as a distinct species. 



