18 
Transactions of the Royal Society of South Africa. 
At certain points, however, there occur numerous fine branches composed of 
one, or more rarely of two, rows of cells (Fig. 4, jB, 0). These branches are 
quite short, run to a point, and do not branch further. They are very 
erratic in their occurrence, whole areas of the thalli being completely devoid 
of them. The large main branches of the thallus were almost invariably 
broken oft* or dead at the tips (Fig. 4, A), but when the actual end was 
present it was always pointed, the branch terminating in a single cell. The 
main filaments gradually widen to a slight extent from the base upwards, 
but retain a rather even edge (Fig. 4, J.) ; in a few cases the distal end was 
irregular in shape. 
(6) CLADOPHOEACEAE. 
Genus EHIZOCLONIUM Kuetzing. 
1. Rhizoclonium hieroglyj^hicum (Kuetz.), Stockmayer, XJeb. d. Algengatt. 
Ehizoclonium, Verh. k. k. Zool.-Bot. Ges. Wien, xl, 1890, p. 578; Kuetzing, 
Phyc. germ., 1845, p. 206. 
Sample 329 (common). 
Previously recorded from South Africa (Wille) and Cape Colony 
(Fritsch). 
Genus CLADOPHOEA Kuetzing. 
1. Cladophora glomerata (L.), Kuetzing, Phyc. germ., 1845, p. 212. 
Sample 79. 
A form in which the membrane of the cells was provided with distinct 
longitudinal folds. Very faint striolations were also often recognisable, so that 
there is some resemblance to var. ornata, Lemmermann (* Forschungsber. 
Biol. Stat. Ploen,' 1895, sep. copy, p. 35, fig. 8), in which, however, the striae 
are more pronounced. 
Previously recorded from Orange Free State (Fritsch). 
(Note. — Undeterminable material of this genus was also present in 
samples 323, 325, and 329.) 
(/) CHAETOPHOEALES. 
(1) CHAETOPHOEACEAE. 
Genus STIGEOCLONIUM Kuetz (MYXOJSTEMA Fries). 
1. Stigeoclonium falhlandicum, Kuetzing, Tab. Phyc, III, 1853, t. 2. 
Samples 70 (?), 71 (?). 
A form showing a certain amount of constriction between the cells, but 
otherwise agreeing with the diagnosis of this little-known species. Most of 
