30 HENRIK PRINTZ [1920 



thc exceeding variability of this species. Thus, fig. 226 shows a 

 thailus where oiie end has been fornied l)y iiearly spherioal cells, 

 and how tlie cells, towards the otlier end of tlie filaments, gradually 

 pass inlo nearly cylindrical ones. Gametangies were also frequently 

 to be found in tliis sample, being of the same l>ollle-shape peculiar 

 to Tr. laffcnifera (fig. 221, 222). At times they are also to be seen 

 with a total al)sence of a beak (fig. 223.) Such specinieiiis are 

 exceptions, however. 



I addition to tlie species of Trentepohlia menlioned liere, I have 

 also found a couple of others. On accounl of the insignificant 

 material, and because I have not seen particularly characteristic 

 stages, I have not baen lable to detemiine them with sufficient cer- 

 tamt}^ but for the sake of coanpleteness I menlion liere: 



? Trentepohlia dialepta (NylandeiOHaiuot, Notes sur le genre 

 Trentepohlia (.Journ. de Botanique, 1889—90) p. 23, Fig. 10; De 

 WiLDEMAN, Notes sm* quelq. esp. Trentepohlia (Annales Soc. belg. 

 raicrosoopie 1894) p. 23, PI. III, Fig. 8—11. 



In one sample colleoted soutJi of the Whaling Station at Bluff, 

 (no. 28) I have observed speoimens of Trentepohlia lliat seein to 

 agree very well with T. dialepta. The cells are ± 8 ^^ bioad, and 

 2 — 4 linies as long, with globose gametangies. The material is too 

 sparse and incomplete for la reliabLe decdsion, however. 



? Trentepohlia ellipsiocarpaScHMiDLK,var africana Schmidle, 

 Beilr. z. Algenflora Afrikas (Engl. hot Jahrli. B. 30. 1901) p. 63, 

 Tab. II, Fig. 8—10. [PI. VI, Fig. 229-2321. 



Specimens probably belonging to tliis one I have obseTved in a 

 sample of bark collected near Bluff (no. 133), where it occurs very 

 sparsely, though. The cells are 3,5—4 jn broad, only a little longer 

 Ihan broad, thin-walled and slightly inflated. The apical cell is 

 acuminate. The ganietangies are ovoid, 12 — 12,5 u long and 6,8—8,5 

 jii broad. 



Phycopeltis arundinacea (Mont.) DeToni, Vehev Phijllactidium 

 (1889); Syll. Alg. I, p. 15. [PI. XI, Fig. 290-2941. 



This species is very common and occurs in nearly natural pure 

 cultures in samples from the eiivirons of Durban (nos. 84 and 116) 

 as also from Saldanha Bay (nos. 381, 384, 387, and 394). It occurs 

 here epiphytic on the stems of varioiis woodened species of gnass, 

 probably bamboo, on the hard, sniooth and silicate surfaoe of whicli 

 it forms a very characteristic coating of a dull greyish-green colour 

 (when dried). 



The individual discoidal thalli are easily seen even with the 

 naked eye; they form nearly orbicular, sharply circumscribed discs 



