FRESHWATER ALGÆ COLLECTED IN THE SOUTH ORKNEYS. 293 
Freshwater Algze collected in the South Orkneys by Mr. В. N. Rudmose 
Brown, B.Se., of the Scottish National Antarctic Expedition, 1902-04. 
Ву Е. E. Frirscu, D.Se., Ph.D., F.L.S., Professor of Botany, East 
London College, University of London. 
(PLATES 10 & 11 and 1 Text-figure.) 
[Read 4th May, 1911.) 
А. Ixrropucrory REMARKS. 
In the year 1905 I received from Mr. В. N. Rudmose Brown, B.Sc., 
seventeen tubes of freshwater and subaerial Alge collected by him in the 
South Orkneys, while acting as botanist to the Scottish National Antarctic 
Expedition (1902-1904). I am glad to have this opportunity of thanking 
him for placing this interesting material at my disposal. The great delay in 
dealing with it has arisen partly out of the great difficulties in the way of 
certainly determining many of the forms present and partly out of pre- 
occupation with other matters. 
Our present knowledge of Antarctic freshwater Algæ is rather meagre. 
The first important contribution is that of Hooker and Harvey *, based on the 
material collected by the ‘Erebus’ and ‘Terror’ in 1839-43. This was 
followed about 35 years later by two papers of Reinsch ft, containing a 
description of the Alga collected by the Rev. A. E. Eaton on the island of 
Kerguelen. А later paper by Reinsch $ deals with the freshwater Alge 
collected by Dr. H. Will in South Georgia. Since then Wille § has described 
a few forms brought by C. E. Borchgrevink from the Antarctic continent, 
* J. D. Hooker, “ The Botany of the Antarctic Voyage of Н.М. Discovery Ships * Erebus ’ 
and ‘Terror’ in the years 1839-43” (Flora Antarctica). Algae (by W. Н. Harvey and 
J.D. Hooker). Vol. i. рр. 175-193 [1845]; vol. ii. pp. 454-519 [1846-47 ]. 
t P. Е. Reinsch, “Species ac Genera nova Algarum aque dulcis, que sunt inventa in 
speciminibus in expeditione Vener, transit. hieme 1874-75 in Insula Kerguelensi a clar. 
Eaton collectis," in Journ. Linn. Soc., Bot. 1876, xv. рр. 205-221; and * Freshwater Algæ 
collected by the Rev. A. E. Eaton. Algze aque dulcis Insule Kerguelensis," in Phil. Trans, 
Roy. бос. London, vol. 168, 1879, pp. 65-92. See also W. Archer, * Note on the Fresh- 
water Alge collected by Н. №. Moseley in Kerguelen's Land," in Journ. Linn. Soc., Bot. 
1876, xv. pp. 445-446; E. O'Meara, “ On the Diatomaceous Gatherings made at Kerguelen's 
Land by Н. №. Moseley, H.M.S. ‘Challenger,’ Joc. cit. рр. 55-59. 
і Р.Е. Reinsch, “Die Süsswasseralgenflora von Süd-Georgien," in (+. Neumayer, ‘ Die 
deutschen Expeditionen und ihre Ergebnisse,’ Bd. ii. 1890, pp. 329-365, tabb. 1-4. 
$ N. Wille, “ Mitteilungen über einige von C. E. Borchgrevink auf dem antarktischen 
Festlande gesammelte Pflanzen: ПТ. Antarktische Algen (by N. Wille); IV. Navicula 
mutica, Kiitz., aus dem antarktischen Festlande (by J. Holmboe),” in Nyt Mag. f. Natur- 
videnskab. xl. 1902, рр. 209-222, pls. 3-4. 
