454 



be met with in the interior of bays and fjords. It belongs to the 

 sublittoral zone but grows in shallow water. Lastly, f. grandis 

 grows in tbe sublittoral zone most commonly in deeper water of 

 some 8 to 10 fathoms and occurs both in the open sea and in the 

 interior of fjords. 



Small, young examples of Laminaria saccharina , the so-called 

 formå phyllitis (cfr., e. g. Kuckuck, Bemerkungen 1, p. 250) often 

 occur in rock-pools. 



This species grows both on rocks and stones, and, more rarely, 



epiphytic on larger algæ, e. g. Laminaria hijperborea. Fructifying 



specimens were found in June and July. The change of laminæ 



probably takes place during winter as specimens found in May, 



June and July still had parts of the old lamina attached. 



This is a very common species of the Færoese coasts. It was first 

 reported by Landt, 1. c. p. 230. 



147. L. færoensis nov. spec. Syn. L. longicruris de la Pyl. var. 

 færoensis Børgs., En for Færoerne ny Laminaria (Botanisk Tids- 

 skrift, Vol. 20, p. 403). 



I had previously described the present plant as a variety of 

 L. longicruris , but after having examined the rich material of it 

 which I gathered on my last journeys, I have no hesitation what- 

 ever in reporting it as a distinct species, all the more as it fills a 

 gap between the nearest allied La/mnar/a-species hitherto described, 

 which in my opinion also include besides L. longicruris, L. groen- 

 landica Rosenv., L. Agardhii Kjellm. and L. saccharina (L.) Lamx. 

 These species and L. færoensis resemble each other in habit; their 

 stems are usually comparatively long, their laminæ undivided, most 

 commonly elliptic with waved margin and of a thin consistency. 

 The following table illustrates the occurrence in these species of 

 hollow stems and muciparous canals in the stems: — 



Hollow stem Solid stem 



With muciparous canals ... L. longicruris L. groenlandica 

 Without — — . . . L. færoensis L. Agardhii 



— — L. saccharina 



Thus we see thai L. færoensis resembles L. longicruris in having 

 a hollow stem, but dillers from it in not having muciparous canals; 

 and the absence of the latter character in /.. Agardhii and L. sac- 

 charina distinguisb.es them from L. groenlandica, while all three 

 have solid stems. 



