2 PATAGONIAN EXPEDITIONS: BOTANY. 



thanks to Dr. Dusen's assistance, most of the specimens have been prop- 

 erly named. 



It was part of my plan to make the work of permanent value, by having 

 it well revised ; and once more I appealed to my generous friend Dr. 

 Dusen. Whilst he was engaged on this troublesome business, Professor 

 Skottsberg wrote to me for specimens of the plants, thus ensuring a 

 double revision ; and both have now carefully completed their work. 

 Their reports, though prepared independently of each other, are singularly 

 harmonious in the outcome. In a few cases I find it best not to combine 

 them, but to give each separately, leaving to the readers the privilege of 

 comparing them. 



I have also had the benefit of notes on some Gramineae by Dr. Teodoro 

 Stuckert, of Cordoba, Argentina ; determinations of species of Accena by 

 Professor Bitter, of Bremen ; notes published by Professor Rendle, of the 

 British Museum ; and the revision of Cruciferce by Gilg and Muschler in 

 the Botanisches Jahrbuch. And I beg to thank all these gentlemen for 

 seasonable assistance during my ten years' conflict with this affair; also 

 Dr. W. B. Scott, and Dr. M. S. Farr, of Princeton, for help in correcting 

 the press. And I cannot but confess my sense of thankfulness to God, 

 who has spared my health, and given me opportunities of laboring in a 

 very interesting bit of scientific work. 



Whilst not attempting to revise the Cryptogams, I have the satisfaction 

 of referring for them to the fine reports of the Swedish Southern Exploring 

 Expedition (1901-1903) which include the botany of Fuegia, of the Falk- 

 land Isles, of South Georgia, Kerguelen Land, and the South Polar 

 regions as far as investigated ; all carefully illustrated. Carl Skottsberg's 

 reports (in German) correlate their Phanerogamic botany ; others give us 

 the algology, and their Bryological Flora (in French, by Jules Chardot). 

 This fine book reinforces arguments from other sources, in favor of the 

 theory that there was a land-connection, in early geological times, between 

 South America, New Zealand, Kerguelen, Tasmania, and South Georgia, 

 as well as South Shetland Isles, to which Amundsen's discoveries now 

 enable us to add Antarctica, with its polar-Andine mountain chain. Both 

 Skottsberg and Chardot emphasize the service rendered by Dusen in these 

 questions ; through his work on the Mosses of Patagonia and Fuegia, we 

 now know of at least 150 additional species in those countries, half of 

 them new to science ; and now the Magellan mosses number 444 species ; 



