Fresh-water Alyce. 73 



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

 Henkriesfontein ; 14.1.09. In a water-pit at Eenriet ; 15.1.09. 



69. Gomphonema lanceolatum, Kiitz. 



Little Namaqualand. In dam at Henkriesfontein ; 14.1.09. 



70. Gomphonema parvulum, Kiitz. 



Angola. In water-conduit at Mossamedes. In stream in Cazengo 

 District. 



Little Namaqualand. In spring at Henkriesfontein ; 14.1.09. 

 Among various algae at Dabainoris ; 11.1.09. 



Var. micropus, (Kiitz.) Cleve. 



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

 8.12.08. 



Great Namaqualand. In cattle-trough at Griindoorn ; 4.2.09. 



71. Rhoicosphenia curvata, (Kiitz.) Grun., var. fracta, (Sehum.) 

 Cleve. 



Karoo. In sulphureous spring at Pappekuil ; 2.12.08. 



Family COCCONEMACEjE. 



72. Cocconcma cequalis, (W. Sm.) nov. comb. (= Cymbella 

 cequalis, W. Sm.) 



Upper (or Composite) Region. Holle River ; 10.12.08. 



73. Amphora coffceiformis, Ag. 

 Angola. In stream in Cazengo District. 



Karoo. In sulphureous spring at Gansfontein ; 2.12.08. 



Upper (or Composite) Region. Holle River ; 10.12.08. 



Little Namaqualand. In dam at Henkriesfontein ; 14.1.09. 

 Among various algaB and Ghara sp. at Dabainoris; 11.1.09. In 

 pool at Aggenys ; 6.1.09. 



This Diatom appears to have a very wide African distribution. 



Var. perpusilla, Grun. 



Little Namaqualand. In a pool at Aggenys ; 6.1.09. 



74. Rhopalodia gibba, (Kiitz.) O. Muller. 



Little Namaqualand. In pools at Brakrivier ; 11.12.09. 



75. Rhopalodia gibbcrula, (Ehrenb.) O. Muller. 

 Karoo. In sulphureous spring, Gansfontein ; 2.12.08. 



Family NITZSCHIACEJE. 



76. Nitzscliia amphibia, Grun. 



Little Namaqualand. In dam at Henkriesfontein ; 14.1.09. 



