82 Annals of the South African Museum. 



growing under the influence of sewage contamination, have not 

 previously been discovered in sulphureous springs. 



Forma breviramosa. 



Forma filis primariis undulato-crispatis ; ramis brevioribus, cum 

 ramulis paucis brevissimis (e seriebus cellularum duabus formatis). 

 Crass, fil. prim, usque 278/.<; crass, ram. 52-91 /< ; crass, ramul. 

 20-25^. (Figs. 45, 46.) 



Little Namaqualand. In brackish water from a weak spring at 

 Nieuwefontein ; 21.12.08. 



Order ULOTKICHALES. 



Family ULOTEICHACE^E. 



112. Ulothrix tenerrinia, Kiitz. 

 Crass, fil. 8^u. 



Little Namaqualand. In dam at Eozynbosch ; 9.1.09. 



113. Uronema confervicolum, Lagerh. 

 Crass, fil. 5-7-5^. 



Upper (or Composite) Eegion . In quantity, epiphytic on a variety 

 of Blrizoclonium hieroglyphicum which was attached to the rocky 

 sides of stagnant pools, Holle Eiver ; 10.12.08. 



Each cell contained a very massive and much-lobed chloroplast, 

 the lobes appearing like large cushions. 



Family CHiETOPHOEACEiE. 



114. Myxonema tcnue, (Ag.) Eabenh. 



Little Namaqualand. Attached in running water at Henkries- 

 fontein; 14.1.09. 



Order CONJUGATE. 



Family ZYGNEMACE^E. 



115. Zygnema sp. (sterile). 

 Diam. fil. 23-24 F . 



Little Namaqualand. In dam at Pella ; 8.1.09. 



1 10. Zygnema sp. (sterile). 



Diam. fil. 20 /( . 



Upper (or Composite) Eegion. In bed of Holle Eiver; 10.12.08. 



