370 



sometimes deeply sinuate. The greater part of the specimens col- 

 lected belongs to f. typica; f. lingulata was met with in several of 

 the fjords, and specimens from quiet waters were on the whole 

 inclined to be prolific. A few of the specimens approached 

 f. quercifolia. 



It is snhlittoral, and while it occnrs at the water's edge in 

 caves and ravines dnring ebb-tide, it also grows lnxuriantly at a 

 depth of 25 fathoms. It is met with both in exposed and sheltered 

 localities, and is common on rocky and stony bottoms as well as 

 epiphytic on Laminaria-species, especially L. hyperborea. 



The plant seems to be able to form new shoots all the year 

 ronnd, but most abundantly during spring. Young piants have 

 been gathered in December. 



Tetrasporic piants were found in May, June, July, August, 



October, November and December and were common altogether, 



while those bearing cystocarps were rarer, and were found only in 



May, July (a specimen in Lyngbye's Herbarium) and November. 



This corresponds to Kjellman 's (1. c. p. 177 [138]) statement that 



this species appears to bear reproductive organs all the year round. 



This species is very common as already mentioned by Lyngbye 

 (1. c. p. 8): - »Ad stipitem Laminariæ digitatæ ad littora Færoensia 

 copiose«. 



35. D. sanguinea (L.) Lam. Hydrolapathum sanguineum (L.) 

 Stackh. Kjellm., N. I., p. 184 (143); Delesseria sanguinea Lyngb., 

 1. c. p. 7. 



Generally found growing in the sublittoral zone, but is also 

 met with in the littoral in caves and grottoes at extreme low-water 

 mark where it may be Lefl uncovered for a shorter time by the 

 spring tide, and in such a case in exposed piaces the leaves are 

 often considerably torn. It is one of the algæ which occurs at the 

 greatest depths; thus I have gathered specimens from a depth of 

 25 fathoms -- consequently, from Kjell mans »elittoral« zone. 



It is a common epiphyte especially on Laminaria hyperborea, 

 but also grows frequenlly on rocky, stony and shelly bottoms. 

 Found on exposed as well as sheltered shores. 



Judging from the material in band the plant appears to give 

 out new shoots early in spring, vigorous piants being collected late 

 in April while in those gathered late in October the branches were 

 more or less naked. Almost all the specimens I had for examination 

 were sterile. A single specimen collected late in October in Kvanne- 



