">72 Annals of the South African Museum. 



2. Chatnaesiphon minimus, Schmidle, Beitr. z. Algenfl. Afrikas, 

 Engler's Bot, Jahrb., xxx, 1902, p. 62 ; Forti, op. cit, p. 138. 

 Sample 44 (forming a dense layer on Dichothri.r spiralis, n. sp.). 



(c) HORMOGONEALES. 



(1) OSCILLATORIACEAE. 



Genus OSCILLATOEIA Vaucher. 



1. Oscillatoria limosa, Agardh ; Gomont, Monogr. d. Oscillariees, 

 Ann. Sci. nat., se'r. 7, Tab. XVI, 1893, p. 210, PI. VI. fig. 13. 



Sample 25. 



Diam. trich , 13-18 ft. Recorded from Holle River, Calvinia 

 Division, by G. S. West. 



2. Oscillatoria tenuis, Agardh; Gromont, op. cit., p. 220, PI. VII, 

 figs. 2, 3. 



Samples 1, 5, 6. 



Diam. trich., 4-(i /x. Recorded from Holle River, Calvinia Division 

 and Little Namaqualand, by G. S. West. 



3. Oscillatoria amphibia, Agardh; Gomont, op. cit., p. 221, PI. VII, 

 figs. 4, 5. 



Sample 3 (rare). 

 Diam. trich., 2-3 fi. 



4. Oscillatoria amoena, Gomont, op. cit., p. 225, PI. VII, fig. 9. 

 Sample 43 (rather rare). 



Diam. trich., 4 /a. 



5. Oscillatoria formosa, Bory ; Gomont, op. cit., p. 230, PI. VII, 

 fig. 16. 



Sample 6. 



Diam. trich., 4-5 /x. Recorded from Little Namaqualand by G. S. 

 West. 



Genus SPIRULINA Turpin. 



1. Spirulina major, Kuetzing, Phyc. generalis, 1843, p. 183; 

 Gomont, op. cit., p. 251, PI. VII, fig. 29. 

 Samples 5, 6, 32. 

 Recorded from Little Namaqualand by G. S. West. 



