Nr. 1] SUBAERIAL ALGAE FROM SOUTH AFRICA 13 
divisions of the contents of the mother cell, and which are 
liberated by the rupture of the old mother wall. The length of the 
cells of Phaseolaria obliqua nov. spec. usually is 8—10 u, only as 
a rare exception up to 12 u long, and %—% as broad. Further, it 
is very conspicuous in this species that the poles of the cells are not 
uniform, one end being distinetly broader and more obtusely 
rounded than the other. 
This species is apparently very rare, as I have found it 
in two samples only, viz. on the bark of a tree-trunk col- 
lected near the Signal Station at Bluff, at the entrance of the 
harbour of Durban, Oct. 28th 1912, and on the bark of a tree near 
Umbilo River, Nov. 12th. On the trunks it forms a light-green 
inerustation, where the cells are aggregated to large congeries. Fig. 
78, på. I, shows a little of such congeries, where the cells are lying 
orientated in all directions possible. The contents are only drawn 
in one cell forming zoospores. The rest of the figures 52—77 show 
the cells or the membranes of the cells seen from the side, fig. 52 
and 57 are cells seen from two different sides. 
Under the name of Protococcus variabilis (Chlorococcum varia- 
bile (Hanse) — in Physiol. u. Algol. Stud. T. 4, Prodrom. I, 
pag. 142, fig. 88 — is deseribed a small alga, which in the shape of 
the cells much resembles Phaseolaria obliqua. Ån examination of 
HANSGIRG'S authentic specimens from Prag in WITTROCk et 
NORDSTEDT, -Algæ Exsiccatæ, Fasc. 23, no. 1091, however, has 
distinetly shown that these two are different. Thus, it may be 
mentioned as two distinguishing features that the species of 
HAanSGIRG has considerably larger cells, nearly twice as long, 
which are quite uniform at both poles. It shows, however, in so far 
a close conformity to the features that are particularly charac- 
teristic of the genus Phaseolaria, especially in the shape of the cells, 
that I refer it to this genus as a second species, Phaseolaria variabilis 
(HansaG.) Printz. This one is also so distinct from all other 
species of Ghlorococcum Frirs — å genus for the rest so well defined 
and to which most of the earlier species, described as Protococcus, 
are referred — that also BRUNNTHALER in his revision of this genus 
in PASscHEr's Algenflora, p. 64, says: «Zugehörigkeit zu Ghloro- 
coccum sehr zweifelhaft». Within the genus Phaseolaria it may, 
however, be given a very natural place. 
Myrmecia nov. gen. 
Cellulae subglobosae-ovales, subirregulares, solitarie et libere 
viventes. Membrana achroa, crassiuscula et latere uno in verrucam 
humilem, latam incrassata. (Ghromatophorum campanulatum, 
viride, parietale, totum fere parietem cellulae obtegens vel uno latere 
incisum. Pyrenoidibus nullis. Nucleus pro ratione magnus, cen- 
tralis. Propagatio zoosporis contentu cellulae maternae diviso suc- 
