84 Annals of the South African Museum. 



Upper (or Composite) Region. In stagnant pools, Holle River 

 10.12.08. Floating in dam at Karieboomfontein ; 8.12.08. 



Little Namaqualand. In spring at Henkriesfontein ; 14.1.09. 

 Floating in masses in small pool at Aggenys ; 6.1.09. 



/. Diam. cells 36-42 fi ; cells with one or two large chloroplasts 

 containing conspicuous pyrenoids. 



Karoo. In sulphureous spring at Pappekuil ; 2.12.08. Also in 

 sulphureous spring (temp, of water 27*25° C.) at Beukesfontein ; 

 1.12.08. 



Upper (or Composite) Region. In stream at Kopje's Kraal ; 

 12.12.08. 



Little Namaqualand. In stagnant pools, Brakrivier; 11.12.09. 

 Floating in dam at Henkriesfontein ; 14.1.09. 



121. Spirogyra sp. (sterile). 



Diam. cells 42-48 yu; cells f-2 (generally 1J) times as long as 

 broad; chloroplasts 2, making i-2 turns, and with large pyrenoids. 

 Karoo. Floating in sulphureous spring at Pappekuil; 2.12.08. 



122. Spirogyra varians, (Hass.) Kiitz. 



Crass, fil. 36-38 fi ; long, zygosp. 50-56^; lat. zygosp. 33-34^. 

 Little Namaqualand. In dam at Kamiebies ; 24.12.08. 



123. Mougeotia sp. (sterile). 



Diam. 7*5-8 ji ; cells 12-16 times as long as broad. 

 Little Namaqualand. In dam at Pella ; 8.1.09. 



124. Mougeotia sp. (sterile). 



Diam. 13 fj, ; cells 7-9 times as long as broad. 



Karoo. In sulphureous spring at Gansfontein ; 2.12.08. 



Family DESMIDIACEiE. 



125. Cylindrocystis pyramidata, W. & G. S. West. 

 Long. 39 h i; lat. 24 A t ; lat. isthm. 22 A <. 



Little Namaqualand. In dam at Rozynbosch ; 9.1.09. 



126. Closterium acerosum, (Schrank) Ehrenb. 

 Karoo. In sulphureous spring at Pappekuil ; 2.12.08. 



Upper (or Composite) Region. In dam at Karieboomfontein ; 

 8..12.08. 



127. Closterium Diance, Ehrenb. 



A small form, but otherwise quite typical ; long, inter apic. 224 ^ ; 

 lat. 19 P . 



Little Namaqualand. Among Chara sp. in dam at Pella; 8.1.09. 



