62 
Transactions of the Royal Society of South Africa. 
Sample 161 (rather common). 
Diam. tricli., 21-30 /i. 
Previously recorded from the Karoo by Gr. S. West. 
2. Oscillatoria saticta, Kuetziiig, Tab. Phycol., i, 1845, p. 30, Tab. XLII, 
fig. 7 ; Gomont, op. cit., p. 209, PI. VI, fig. 12. 
Sample 326 (common). 
Diam. trich., 16 /i. 
3. OsciUatoria limosa, Agardh, Disp. Alg. Suec, 1812, p. 35 ; Gomont, 
o|). cit., p. 210, PL VI, fig. 13. 
Sample 158 (rather rare). 
Previously recorded from Holle Eiver, Calvinia Division (Gr. S. West), 
and Orange Free State (Fritsch). 
4. OsciUatoria tenuis, Agardh, Alg. Decades, ii, 1813, p. 25 ; Gromont, 
op. cit., p. 220, PI. VII, figs. 2, 3. 
Samples 23, 24, 28 (here very rare), 336. 
Previously recorded from Holle Eiver, Calvinia Division (Gr. S. West), 
Little Namaqualand (G. S. West), the Cape (Fritsch), and Madagascar 
(Fritsch). 
5. OsciUatoria geminata, Meneghini, Consp. alg. eugan., 1837, p. 9 ; 
Oomont, op. cit., p. 222, PI. VII, fig. 6. 
Sample 346 (common). 
6. OsciUatoria splendida, Greville, Fl. edinensis, 1824, p. 305 ; Gomont, 
op. cit., p. 224, PL VII, figs. 7, 8. 
Sample 324 (common). 
Forming dense tufts on the surface of Phormidium fragile ; diam. trich., 
2-5-3 fx. 
7. OsciUatoria animalis, Agardh, in Flora, x, 1827, p. 632 ; Gomont, 
Of. cit., p. 227, PL VII, fig. 13. 
Samples 161, 312. 
Previously recorded from Little Namaqualand (G. S. West), and South 
Africa (Wille). 
8. OsciUatoria brevis, Kuetzing, Phyc. generalis, 1843, p. 186 ; Gomont, 
op. cit, p. 229, PL VII, figs. 14, 15. 
Sample 86. 
9. OsciUatoria formosa, Bory, Diet. Class, d'hist. Nat., xii, 1827, p. 474 ; 
Gomont, op. cit., p. 230, PL VII, fig. 16. 
Samples 324, 326. 
Diam. trich., 6 
Previously recorded from Little Namaqualand (G. S. West) and the 
Cape (Fritsch). 
