66 Annals of the South African Museum. 



Order HOBMOGONE^E. 



Family OSCILLATOBIACEJE. 



16. Spirulina, subtilissima, Kiitz. 



Upper (or Composite) Eegion. On drying mud in bed of Holle 

 Eiver; 10.12.08. 

 Forma. 



Diam. trich. 1 /.i ; diam. spir. 2*6 /z. 

 Little Namaqualand. In dam at Pella (very common) ; 8.1.09. 



17. Spirulina tcnuissima, Kiitz. (= Sp. subsalsa, (Ersted.) 

 Crass, trich. 1-4-1-5/x; crass, spir. 4-2 t<. 



Little Namaqualand. Rather rare in dam at Pella ; 8.1.09. 



18. Spirulina major, Kiitz. 



Little Namaqualand. On wet mud at Pella; 8.1.09. 



19. Oscillatoria animalis, Ag. 



Little Namaqualand-. On wet gravel in dam at Kozynbosch ; 

 9.1.09. 



20. Oscillatoria chlorina, Kiitz. 

 Crass, trich. 3 - 5 fx. 



Little Namaqualand. In dam at Pella ; 8.1.09. 



21. Oscillatoria formosa, Bory. 



Little Namaqualand. With the preceding species. 



22. Oscillatoria Okeni, Ag. 



Little Namaqualand. In dam at Pella; 8.1.09. Among other 

 floating algye at Dabainoris ; 11.1.09. 



23. Oscillatoria tenuis, Ag. 



Karoo. In shallow stream, Beukesfontein ; 1.12.08. 

 Upper (or Composite) Eegion. Holle Eiver ; 10.12.08. 

 Little Namaqualand. In dam at Pella ; 8.1.09. 



24. Oscillatoria limosa, Ag. 

 Crass, tricb. 20 ji. 



Upper (or Composite) Eegion. Holle Eiver ; 10.12.08. 



25. Oscillatoria princeps, Vauch. 



Karoo. In spring smelling strongly of sulphuretted hydrogen at 

 Pappekuil ; 2.12.08. In a similar spring at Gansfontein ; 2.12.08. 



26. Phormidium angustissimum, W. k G. S. West. 

 Little Namaqualand. In dam at Pella; 8.1.09. 



Great Namaqualand. In spring (sulphureous) at Warmbad ; 

 28.1.09. 



