58 Transactions of the Boyal Society of South Africa 
wide sheath, were composed of cells with dense g-rannlar contents including 
large shining drops of some oily material (Fig. 25, C). These are probably 
resting-stages of this species. 
(Note. — Sterile, indeterminable material of Zyguema was also observed 
in samples 64, 65, 85, 86, 159, 312, 314, 316, and 327.) 
(4) ME80CARPACEAE. 
GTenus MOUGEOTIA Agardh. 
1. Moiigeotia nherosj)erma, W. & Gr. S. West, Welwitscli's Afr. Freshw. 
Alg., Journ. of Bot., 1897, p. 37. (Fig. 26.) 
Sample 36 (rare). 
Lat. cell, veg., 7-9 /x ; long. cell, veg., 30-34 /x ; diam, zygosp. sine proc, 
24-25 /X ; crass, membr. zygosp., 3'5-4*5 /x ; long, proc, usque 18 /x. 
This small species has hitherto only been recorded from Huilla and its 
rediscovery in Kentani is interesting. The zygospores are very characteristic, 
being irregularly angular-globose (Fig. 26, a and h), with a thick, colourless, 
plainly stratified wall and bearing four processes of very unequal length. 
The processes are homogeneous and apparently mucilaginous in nature and 
are more or less pointed when long, though blunt when short (Fig. 26, a 
and b) ; they extend for a variable distance into the cavities of the con- 
jugating cells. The unoccupied part of the latter would also appear in 
some cases to become filled up Avitli some distinctly stratified material 
(Fig. 26, a, m). 
(Note. — Sterile material of Mougeotia was also observed in samples 64, 
66, 311, 312, 315, and 327.) 
II. HETEROKONTAE. 
(4) TRIBONEMACEAE. 
aENus OPHIOCYTIUM Naegeli. 
1. Ophiocytium majus, Naegeli, G-att. einzell. Alg., 1848, p. 89, PI. IV, 
A, fig. 2 ; Heering, Suesswasseralg. Schleswig-Holsteins, etc., i, 1906, p. 120, 
fig. 25. 
Sample 22. 
Previously recorded from the Cape (Fritsch). 
2. Ophiocytium parvulum (Perty), A. Braun, Alg. unicell., etc., 1855, 
p. 55 ; Heering, op. cit., p. 124, fig. 31. 
