Contribution. I. 36 



f. subsimplex Rupr. 



Alg. Och. p. 270. 

 Descr. Halosaccion soboliferum var. subsimplex Eupr. 1. c. 

 Fig. „ ramentaceum f. subsimplex Kjellm. Isli. Algfl. 1. 13, fig. 3. 



f. densa Kjellm. 



N. Ish. Algfl. p. 196. 

 Descr. Scytosiphon ramentaceus Lyngb. Hydr. Dan. p. 61. 

 Fig. Fucus ramentaceus Turn. Hist. Fuc. t. 149. 

 Exsicc. Halosaccion ramentaceum Aresch. Alg. Scand. exsicc. No. 205. 



Syn. Fucus ramentaceus Gunn. Fl. Norv. 2, p. 79. 

 „ „ Wg. Fl. Lapp. p. 504. 



„ barbatus Gunn. 1. c. p. 129. 

 Ulva sobolifera Gunn. 1. c. p. 105. 

 Scytosipbon ramentaceus Lyngb. Hydr. Dan. p. 61. 

 Dumontia ramentacea Aresch. Phyc. Scand. p. 313. 



This species is probably the most common of the Flori- 

 deae of East-Finmarken. It is also here somewhat variable, 

 though it appears as a rule under the form densa along the 

 open shore. This form grows gregarious in great number of 

 individuals. Now and then f. ramosa and f. subsimplex are 

 met with. The latter becomes mostly coarse on unsheltered 

 coast, in quiet bays on the other hand, it gets much thinner. 

 Of the form robusta I have not seen typical specimens at 

 East-Finmarken, and here it seems to be very rare. A couple 

 of specimens referred to this form are perhaps more really 

 to be regarded as a transition between f. densa and f. robu- 

 sta. Yet in Tromso amt I have collected specimens which 

 almost fully coincide with Spitzbergian ones, and therefore 

 il is most likely to suppose, that it also occurs at Finmarken. 



The present plant is litoral as well as sublitoral, yet it 

 chiefly appears in the litoral zone. At some places it forms 

 a broad girdle from about half tide to a few feet below ex- 

 treme low-water mark. Sometimes it is attached to other 

 algae, as Fucaceae in the litoral zone and roots of Laminaria 

 in the sublitoral one. But it occurs particularly and best 



