54 CARL SKOTTSBERG, MARINE ALGJE 1. PH^OPHYCE^E 



It differs from typical D. Harveyi in having the frond split np into long, linear seg- 

 ments, but leaving an ample part above the stipe entire; the segments are flat, not 

 whip-like, the colour a shade darker. Typical D. Harveyi is so utterly unlike antarc- 

 tica that nobody would be inclined to unite them under the same specific name. 

 Still, we must consider the possibility of regarding all the forms as belonging to one 

 species, adapted to various external conditions. Or, there may be hybrids. With 

 my present knowledge of these plants I do not, however, find sufficient reasons to 

 suppress D. Harveyi. 



Laminaria ccepestipes Montagne in D'Orbigny, Voy. Amer. mérid. Bot. I, Ser- 

 tum patagonicum, p. 11, pl. II, seems to be an intermediate form, nearer to Harveyi 

 than to antarctica. The specimen came from the Falklands. 



D. antarctica (CHAM.) HaRIOT. 



Pure associations were seen in several places and more closely examined in 

 the Evangelistas Islands outside the west entrance to the Straits of Magellan, and 

 at Cape Pembroke in the Falkland Islands. Fertile specimens were collected in 

 November, 1907. 



Distribution: Centr. Chile to Cape Horn, Falkl., Kerg., N. Zeal., Chatham, 

 Auckl. and Campbell Isl. It does not grow in S. Georgia, but drifted pieces are 

 sometimes found. 



D. Harveyi Hook. FIL. 



From the different structure of this species I concluded (Ant. Meeresalg. I p. 

 142) that it grows in deeper water, what, as was shown above, is not the case. I 

 have seen a form of this growing with D. antarctica opposite Chiloé, and it forms 

 beautiful associations in the Magellan Straits, f. inst. in San Felix Island. It is 

 common along the coast of the Falklands, forming associations in Westpoint Island, 

 along the coast between Westpoint and Hill Cove, in Low Bay, round Cape Pem- 

 broke, etc. 



Distribution: Subantarct. Amer. with the former, Falkl., Kerg., Crozet Isl. It 

 has not been reported from New Zealand. 



