98 BOTANICAL RESULTS OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 



Both in Kerguelen and South Georgia the flora is richer in conjugates, especially in 

 desmids, which are responsible for 19 of the 20 species from South Georgia, while 

 in the vegetation of the latter the Cyauophycese play a comparatively small part. But 

 it is in the relative number of filamentous forms (species of CEdogonium, Bulbochwte, 

 Ulothrix, Rhizoclonium, Vaucheria, Spirogyra, etc.) present in the flora of Kerguelen 

 and South Georgia, as compared with the South Orkneys, that the difference becomes 

 most striking ; in this connection we may also notice that there is a considerable 

 reduction in the number of filamentous forms from South Georgia as compared with 

 Kerguelen. From both localities, also, reproductive material was obtained ( Vaucheria 

 from Kerguelen, Vaucheria and (Edogonium from South Georgia). Lastly, we may 

 notice that the common cosmopolitan forms, whose absence from the flora of the South 

 Orkneys was commented upon above, are all recorded by Reinsch either from Kerguelen 

 or South Georgia. It is hardly likely that all these striking differences in the composi- 

 tion of the algal flora of the South Orkneys are purely accidental. They are probably 

 to be ascribed to the geographical position of the South Orkneys and the consequent 

 severer climatic conditions. 



To avoid frequent repetition I append a list of the localities in which the different 

 samples were collected ; the corresponding number will alone be referred to in the 

 systematic portion of this paper : 



No. 1. Yellow snow. The Beach, Scotia Bay. 7.2.04. 

 2. Yellow snow. The Beach, Scotia Bay. 27.3.03. 

 ,, 3. Same locality and date as No. 1. 

 4. Red snow. Scotia Bay. 27.3.03. 

 ,, 5. Red snow from ice-foot, head of Scotia Bay. 29.12.03. 

 ,, 6. Same locality as No. 5, but collected 1.1.04. 

 ,, 7. Algae from germ-culture from surface water, 62 52' S., 25 00' W. 



16.2.03 (only fungi present). 

 ,, 8 and 9. Scrapings of rocks and mud from pools or streams. Mossy rocks, 



Scotia Bay. 28.12.03. 

 10 and 11. Freshwater pond, 140 feet between peaks of Saddle Island, South 



Orkneys. 4.2.03. 



12. Rocks about tide wash. Buchan Bay, South Orkneys. 25.3.03. 

 ,, 13. Mud and damp moss. Point Martin, Scotia Bay. 7.1.04. 

 14. Mud from penguin rookery. Point Martin, Scotia Bay. 26.10.03. 

 15. Freshwater pool. Point Thomson, Brown's Bay. 11.03. 

 ,, 16. Stones on north of beach, Scotia Bay. 11.11.03. 

 17. Mud from moss on rocks at Point Martin, Scotia Bay. 21.10.03. 



In the following pages the flora of the yellow and red snow is first dealt with 

 separately, and this is followed by a systematic enumeration of all the species 

 observed. 



