Bd. IV: ıı) THE LICHENS. 61 
Some geographical considerations. 
In the year 1847 HOOKER published in his Flora Antarctica (Vol. II) a list of 
nine lichens which had been collected on Cockburn Island. This is his list: 
Parmelia saxatılis ACH. p. 533. Lecanora (now Placodium) miniata ACH. 
(now Physcia) stellaris ACH. p- 535. 
P- 534. Pertusaria communis D. C. p. 549. 
Lecanora chrysoleuca ACH. p. 534. Verrucaria umbrina ACH. p. 541. 
» Babingtonii HOOK.FIL.et TAYL. Collema crispum ACH. p. 541. 
P- 535- 
(now Placodium) murorum ACH. 
P- 535- 
Of these plants only four have been again found by more recent expeditions 
but not even these in the same localities. PAhyscia stellaris and Lecanora chryso- 
leuca have been recorded from Victoria Land. Placodium murorum and minlatum 
have been found in South Georgia and the former also in the South Shetland Is- 
lands, in the Western Antarctis, but not on Cockburn Island and in Victoria Land. 
For more than half a century this List was the only Lichen List from the Antarctic 
Continent. It is only during the last ten years that Lichens have been brought in 
larger quantities from the true Antarctic Regions. 
An historical enumeration of the material and the new species brought back by 
the various expeditions from the Antarctic bontinent is of some interest. 
| arclic. 
Ross’ Antarctic Voyage, 1[839—1843 . - - - -» » . . | HOOKER, 1843— 1847 9 9 I 
Borchgrevink’s Expedition, 1898—1900 . . . . - » TH. FRIES, 1902 | 4 2 —_ 
> » > ee Re BLACKMAN, 1902 4 2 — 
Gerlache de Gomery’s Expedition, 1897—189g . | Wainıo, 1903 55 5ı 29 
Bruce’s Expedition, 1902—1904 . » » » » » » » . „| DARBISHIRE, 1905 11 6 —_ 
Drygalski’s Expedition, 190I—1903 . - . . » - . . | ZAHLBRUCKNER, 1006 3 —_ _ 
Charcot’s Expedition, 1903—1905 . . 2. 22.2. «| HuE, 1906 16 6 4 
Scott’s Antarctic Expedition, 190I—1904 - : - 7 - | DARBISHIRE, I9IO 24 12 5 
Nordenskjöld’s (tlıe present) Expedition 1901—1903 .| DARBISHIRE, IQII 4 | 18 9 
| Total | — 106 _ 
