296 DR. Е. E. FRITSCH ON FRESHWATER ALG 
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 Cyanophycee play a 
comparatively small part. But it is in the relative number of filamentous 
forms (species of Gidogonium, Bulbochete, Ulothria, Rhizoclonium, Vaucheria, 
Spirogyra, etc.) present in the flora of Kerguelen and South Georgia as com- 
pared 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 from either Kerguelen ог South Georgia. It is hardly 
likely that all these striking differences in the composition 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 climatie conditions. 
To avoid frequent repetition, I append a list of the localities in which the 
different samples were collected ; the corresponding number will alone he 
referved to in the systematic portion of this paper :— 
No. 1. Yellow snow. The Beach, Scotia Day. 7.2.04. 
„ 2 № » Е 27.3.03. 
, 9. Same locality and date as No. 1. 
„ 4. Red Snow, Scotia Bay. 27.3.03. 
„5. " From ice-foot, head of Scotia Вау. 29.12.03. 
„ 6. Same locality as No. 5, but collected 1.1.04. 
7 
. Algæ from germ-culture from surface water, 62° 52' S., 25° 00' W. 16.2.03 
(Only Fungi present.) 
» 8&9. Scrapings of rocks and mud from pools or streams, Mossy rocks, Scotia Bay 
28.12.03. 
» 10 & 11. Freshwater pond. 140 feet between peaks of Saddle Island, South Orkneys 
4.2.08. 
„ 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 Thomsen, Brown's Вау. No date. 
„ 16. Stones on north of beach, Scotia Вау. 11.11.08. 
» 17. Mud from moss on rocks at Point Martin, Scotia Day. 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 systematie enumeration of all the 
species observed. 
