■^0 Transactions of the Boyal Society of South Africa. 
Previously recorded from tlie Cape region, Little Namaqualand, and 
Holle Eiver (G. S. West). 
Genus GLOEOTHECE Naegeli. 
1. Gloeothece linearis, Naegeli, op. cit., p. 58, Tab. I, g, fig. 2 ; Forti, 
oj). cit., p. 62. 
Samples 159 (rare) and 324 (very common). 
Lat. cell., 2-2-5 ij, ; long, cell., 10-15 fi. The sheaths of the individual 
cells were very difficult to decipher, even after staining. The cells were very 
variable in form, short straight rods with rounded or pointed ends being 
most common, but lunate and faintly sigmoid shapes were not infrequent. 
A few cells were also observed in which one side was flat and the other 
convex. 
2. Gloeothece confluens, Naegeli, op. cit., p. 58, Tab. I, g, fig. 1 ; Forti, 
op. cit., p. 60. 
Sample 159. 
Genus APHANOTHECE Naegeli. 
1. Aphcuiothece inicroscopica, Naegeli, op), cit., p. 59, Tab. I, h, fig. 1 ; 
Forti, op. cit., p. 88. 
Sample 85. 
Genus MICROCYSTIS Kuetzing. 
1. Microcystis parasitica, Kuetzing, Phycol. generalis, 1843, p. 170; 
Phycol. german , 1845, p. 148; Tab. Phycol., i, 1846, Tab. IX; Forti, 
op. cit., p. 91 ; Fritsch, Fresliw. Alg., Nat. Antarct. Exped., vi, 1912, p. 24, 
PI. I, figs. 67-70. (Syn. : Microcystis firnia (Breb. et Lenorm.), Migula.) 
Sample 324 (common, on Phormidium fragile.) 
2. Microcystis chroococcoidea, W. & G. S. West, Freshw. Alg., Brit. 
Antarct. Exped. 1907-9, vii, 1911, p. 296, PI. XXVI, figs. 107-114. 
Sample 324 (rather rare, on Phormidium fragile). 
Colonies of small cells (diam., 4 n). This species has hitherto only been 
recorded from the Antarctic (by W. & G. S. West and F. E. Fritsch). 
Genus GOMPHOSPHAERIA Kuetzing. 
1. Gomphosphaeria aponina, Kuetzing, Alg. aq. dulc. german., Decas 16, 
1836, No. 151 ; Tab. Phycol., i, 1846, p. 22, Tab. XXXI, fig. 3 ; Forti, op. cit., 
p. 97. 
Samples 159 (common), 312, 325, 326. 
Previously recorded from Little Namaqualand (G. S. West). 
