The Freshwater Algae of Africa. 595 



(3) COCCONEMACEAE. 



Genus CYMBELLA Agaedh. 



1. Cymbella pusilla, Grrun. ; Cleve, op. elf., p. 162; Van Heurck, 

 op. cit., p. 62, PL Iir, fig. 5. (Fig. nostr. 40, g.) 



Samples 52-54. 

 Long., 25 (j. ; lat,, 6 p. 



2. Cymbella (Cocconema) cistula, Hemprich ; Cleve, op. cit, p. 173; 

 Van Heurck, p. 64, PI. II, figs. 12, 13. 



Var. maculata, Kuetz.; Cleve. op. cit., p. 1 7:1 ; Van Heurck. op cit 

 p. 64, PI. II, figs. 16, 17. 

 Sample 33 (on Cladophora). 

 Long., 57-60 /x ■ lat., 18-20 \l. 



3. Cymbella {Cocconema) lanceolata, Ehrenb. ; Cleve, op. cit., p. 174 ; 

 Van Heurck, op. cit., p. 63, PI. II, fig. 7. 



Sample 25. 



4. Cymbella (Encyonemd) ventricosa, Kuetz. ; Cleve, op. cit., p. 168; 

 Van Heurck, op. cit., p. 66, PL III, fig. 17. 



Samples 25,30a, 31. 



Genus AMPHOEA Ehrenberg. 



1. Amphora ovalis, Kuetz.; Cleve, op. cit., ii, p. 104; Van Heurck, 

 op. cit., p. 59, PL I, fig. 1. 



Samples 5, 31, 32, 34a, 35, 47, 48. 



A small form. Long., 30-39 /* ; lat., 12-15 //.. 



2. Amphora lineolata, Ehrenb. ; Cleve, op. cit., p. 126; Van Heurck, 

 op. cit., p. 57, PL I, fig. 23. 



Sample 4. 



Genus EPITHEMIA Brebisson. 



1. Epithemia sorex, Kuetz. ; Van Heurck, op. cit., p. 139 PI XXXII 

 figs. 6-10. 



Samples 25, 29, 29a, 30, 30a, 31, 32, 33. 



2. Epithemia gibba, Kuetz. ; Van Heurck, op. cit., p. 139, PL XXXII, 

 figs. 1, 2. (Sjn. : Rhopalodia gibba (Kuetz.), O. Muell.) 



Samples 25, 32. 



Recorded from Little Namaqualand by G. S. West. 



3. Epithemia zebra (Ehrenb.), Kuetz. ; Van Heurck, op. cit , p 140 

 PL XXXI, figs. 9, 11-14. 



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