My botanical survey in 1907 — 09 covered only a part of tlie area I had visited dur- 

 ing the Antarctic cruise five years earlier, but was extended much farther north, 

 where very little algological work had been done before. From the region between 

 the western entrance to the Magellan Strait and Valparaiso my material is, however, 

 rather scanty. While the coast of Peru on one side, and Fuegia on the other, are toler- 

 ably well known in this respect, the enormous intermediate region has been neglected, 

 a region most important from a geographical point of view. It is recommended to future 

 explorers to collect as much as possible along the coast of Chile (in West Patagonia 

 not only in the inner, but also in the outer channels), so that the connection between 

 the marine floras of Peru and Fuegia will become firmly established. 



In the present paper I have followed the arrangement of genera and species etc. 

 in the memoir by Kylin and the writer, with exception of the Delesseria family. Last 

 time I had to leave the species of that family under current names, until a detailed study 

 of all my new material and an examination of a number of Agardh's and other au- 

 thors' types could be undertaken. I have done my best to supply this need, and some 

 of the results are laid down in this treatise. My thanks are due to Professor Kylin 

 for kind assistance on various occasions, and to the museums at Kew, Stockholm and 

 Upsala for the loan of material. 



Botanic Gardens, Gothenburg, February 1922. 



Explanations: St. = station, collecting place. <£ = specimen with Bpertaatanges, ^ with cystocarps, 

 witli tetraspores. 



