64 Transactions of the Royal Society of South Africa. 
6. PJiormidium siibfuscum, Kuetzing, Phycol. generalis, 1843, p. 195 ; 
Gomont, o;p. cit., p. 182, PI. Y, figs. 17-20. 
Scample 326. 
Diam. fil., 10-11 ;u. 
Previously recorded from Table Mountain (Fritscli). 
7. Phormidium autumnal e, Gomont, op. cit.,\). 187, PI. V, figs. 23, 24. 
(Sjn. : P. uncinatum, Grom.) 
Samples 69, 79, 82, and 84. 
Previously recorded from the Cape Province (Fritsch). 
Genus LYNGBYA C. Agardh. 
1. Lyngbya aestuarii, Liebman, Bemerkn. og till, dansk. Algefl.^ 
Kroeyer's Tidsskrift, 1841, p. 492 ; Gomont, op. cit., p. 127, PL III, figs. 1, 2. 
Sample 324 (rather common, on Phormidium fragile). 
Diam. fil., 18-20 A*. 
2. Lynghya major, Menegliini, Consp. alg. eugan., 1837, p. 12 ; Gomont, 
op. cit., p. 144, PI. Ill, fig. 15. 
Sample 24 (rare). 
Previously recorded from South Africa (Wille), Little Namaqualand 
(G. S. West), and the Cape (Fritsch). 
3. Lynghya aerugineo-coerulea , Gomont, op. cit., p. 146, PI. lY, figs. 1-3. 
Sample 329 (rather common). 
Diam. trich., 4-5 The trichomes did not exhibit any specially 
differentiated apical cell, although there was sometimes a slight thickening 
of the outer wall of the end-cell. The septa were often very indistinct and 
not granulated and the cell-contents in many of the trichomes very homo- 
geneous. Such forms come very close to L. cladophorae, Tilden (Minnesota 
Algae, i, 1910, p. 116, PL Y, fig. 34), which is probably but a form of 
L. aerugineo-coerulea. The species has been previously recorded from Table 
Mountain (Fritsch). 
4. Lynghya huetzingii, Schmidle, Algol. Not., iv, Allgem. hot. Zeitschr.,. 
1896, p. 58 ; Forti, op. cit., p. 280. 
Yar. distincta (Nordst.), Lemmermann, Engier's Bot. Jahrb., xxxiv,. 
1905, p. 620. (Syn. : L. suUilis, W. West ; L. disti^icta, Schmidle.) 
Sample 24 (rather common, on Vaucheria sp.). 
Lat. fil., 1-8 /x. 
Previously recorded^from the Cape (Fritsch). 
