M. Foslie. Contribution IL 



51 



the disk arises a small bundle of simple filaments, comraon- 

 ly 10—25 in number, 350—700 p. in length, either equal in 

 thickness throughout, 10— 13 ^, orsometimes feebly tapering 

 towards the tip. The cells are cylindrical with rather thick 

 walk, 1 — 2 Va times as long as broad. The chromatophores 

 are like those in the basal disk but larger and generally 

 more elongated, 4 — 10 in each cell. 



I have only found a single but certain gametangium 

 which, however, was not fully developed. It is situated a 

 little below the tip of a filament, borne on a short peduncle 

 composed of 2 cells which are thinner than their main axis, 

 17 — 20 [x long and 7 \l thick, The gametangium is oblong 

 31 p. long and 13 \k thick. 



This species is, as far as can be at present ascertained, 

 plainly distinct from any known species cf the genus, per- 

 haps most nearly related to Ascocyclus reptans (C r.) Uke., 

 but rather more reminding one of Ectocarpus repens R k e. 

 (JPhycocelis reptans Kjel lm). It seems however to be se- 

 parated from both by essential characteristics. The plant 

 was collected in the middle of August, appearing in rather 

 large number on the leaf of Laminaria sacharina in an en- 

 closed sound at Svinor in the neighbourhood of Lindesnes. 



Ectocarpus draparnaldioides Cr. 



Alg. mar. Finist. No. 24. 

 Beser. Ectocarpus draparnaldioides Kjellin. Handbok I, p. 75; Scand. 



Ect. o. Tilopt. p. 87. 



* 



I found a couple of specimens of this plant, which for- 

 merly has been collected at Kristiansund and Lofoten, living 

 on a depth of about 8 fathoms at Svinor in the neighbour- 

 hood of Lindesnes. It was provided with gametangia at the 

 end of August. 



Sphacelaria cæspitula Lyngb. 



Hydr. Dan, p. 105, t 82, 



