The Freshwater Algae of Africa. 491 



1. ISOKONTAE. 



(a) CHLAMYDOMONADALES. 

 (2) CHLAMYDOMONADACEAE. 



Genus CHLAMYDOMONAS Ehrenbekg, 



1. Ghlamydomonas intermedia, Chodat, Bull. Herbier Boissier, ii, 

 p. 590, Tab. XXII, XXIII; Wille, Algol. Notizen, xi, Nyt. Mag. f. 

 Naturvidenskab, lxi, 1903, p. 142, Tab. IV, fig. 15. 



Sample 36 (very common). 



A small form, long, cell., 12 ft ; lat., 9 ,x. Tbe bulk of the material 

 was in the PafozeZZa- stage. No cilia could be detected on any of 

 the ordinary individuals, so that the determination is not altogether 

 certain. 



2 Ghlamydomonas reirihardi, Dangeard, Recherches s. 1. Algues inf., 

 Ann. Sci. Nat., scr. 7. Bot., vii, 1888, p. 130, PI. XII, figs. 28-39; 

 Wille, loc. cit., p. 139, Tab. IV, fig. 9. 



Sample 18 (?), 36 (?). 



(Note.— Individuals of this genus, whose characters were not 

 sufficiently clear for purposes of determination, were also observed" 

 in samples 8, 12, 13, and 31.) 



(5) VOLVOCACEAE. 



Genus PANDORIXA Bory. 



1. Pandorinot morum (Muell.), Bory, Hist. int. Zoophytes, ii, 

 Paris. 1824, p. 600. 

 Samples 31, 39. 



Genus EUDORINA Ehrenberg. 



1. Eudorina elegans, Ehrenberg, Infusionsthiere, 1831, p. '8, 

 PI. II, fig. 10. 



Samples 24, 31, 33. 



The colonies in samples 31 and 33 were 16-celled and consisted of 



small cells. 



