Nr. 1] SUBAERIAL ALGAE FROM SOUTH AFRICA 9 
Chlorophyceae. 
Protococeus consociatus nov. spec. [PI]. I, Fig. 1—171. 
Cellulis minimis, vulgo 2,5—3,5 u diametro, in colonias maximas 
consociatis. Cellulis solitariis vel coloniis minus quam 4—38 cellulas 
continentibus raris. Colonia 32 cellularum plus minusve 14 u dia- 
metro est. Cellulae divisae diu cohaerentes, unde coloniae magnae 
32—64—128 vel etiam plurium cellularum oriuntur. Gellulis cubice 
rotundatis, membrana tenui, glabra, colore rubello vel subaureo. 
Chromatophoro parietali, campanulato, totum parietem interiorem 
obtegente, nullas partes vacuas, achroas relinquente. Pyrenoidibus 
nullis. 
This alga much recalls Protococcus viridis AG. and Protococcus 
Kiitzingii G. S. West, but differs from both species mentioned 
in generally having smaller cells, usually forming much larger, 
coherent colonies. Generally colonies occur that are composed of 
32 or 64 cells, or of a still greater number, up to about 300 cells. 
Colonies of 4—38 cells also occur, while single cells or bicellular colo- 
nies, which are rather frequent in Pr. viridis, are very rare here. In 
large eolonies the individual cells by mutual compression get more or 
less angular, sometimes also rather irregular. The annexed illustra- 
tions (pl. I, fig. 1—17), for the rest, will give an idea of the shape 
and arrangement of the cells and oolonies. The cell-wall is thin 
and smooth; sometimes it seems to be slightly crenulate. 
Å most distinctive feature of the species is also that the 
membrane has a slightly reddish or golden tint. The chromato- 
phore is bell-shaped, panietal, covering the whole inner wall of the 
cell, without leaving any open or colourless part; it is without å 
pyrenoid. The diameter of the cells usually is 25—3,5 u, only 
immediately before the division at times somewhat larger, up fo 
about 4 u. The diameter of a 32-celled colony is + 14 4 and of a 4- 
(or 8-) celled colony on an average 7—8,5 u. 
This species I have found to be very common in quite åa number 
of samples of bark collected in the woods above Bluff (Durban), 
along the cross-road to the South African Whaling Co.'s station, and 
towards Isipingo kraales, in the days November 13th to 17th, 1912. 
The species occurs in the following samples: 98, 112, 121, 125, 
126, 128, 179, 222, 246, 251, 252, 260, 280, 294. 
Protococcus verrucosus nov. spec. [PI]. I, Fig. 18—30]1. 
Cellulis 5—9 u, vulgo 5,5—7 diametro, subglobosis vel angulari- 
globosis, plerumque 2—4—8 in colonias consociatis. Membrana 
crassiuscula, achroa, distincte verrucosa. Chromatophoris singulis, 
magnis, parietalibus et homogeneis, pyrenoide carentibus. 
få S 
fa v VS fy 
Ke >O> A 
dr 
LIBRA 
