Transactions of the Boyal Society of South Africa. 
pools of the Buffalo Eiver at King William's Town. The total number 
of species recorded (exclusive of Diatoms) is 146 belonging to 63 genera 
(or, if we exclude the samples from King William's Town, 141 species 
and 61 genera) ; these include six new species, a new subspecies, and thirteen 
new varieties, apart from a number of new forms. 
According to Miss Pegler, who has been mainly instrumental in 
collecting these samples, the collections may be considered as fairly 
representative of the Kentani District, though no samples were taken 
from the largest rivers. If this is a fair statement the algal flora is very 
poor in many respects, especially in the paucity of Protococcales and in 
the scanty representation of most genera of Desmids. The latter were 
plentiful as a matter of fact only in samples 36 and 327, and only the 
genera Closterium and Cosmarium were at all commonly present. The 
great scarcity of species of Euastruni and Staurastrum is especially striking, 
and, although the same feature was noted in the collections from the Cape 
(see the second report of this series), it does not apply to South Africa 
generally, as is demonstrated in other collections in course of being worked 
out. The Zygnemaceae are relatively well represented, which is perhaps 
due to many of the samples having been taken from small, stagnant pools, 
whilst the rather marked preponderance of Blue-green Algae in many of 
the collections is a feature often associated with conditions unfavourable to 
the growth of green forms. 
In her introduction to the Flora of Kentani Miss Pegler* remarks 
that Kentani is said to be drying up and that surface water is less, streams 
smaller, and marshes disappearing. Herein perhaps lies the explanation 
for the scanty algal flora. 
Amongst points of special interest may be noted the extension of the 
range of Pediastrum integrum var. pearsoni (P. ijearsoni Gr. S. West), the 
discovery of Zygnema cyanosjjermum Cleve in South Africa, and the finding 
of Mougeotia uherosperma W. and Gr. S. West, hitherto only recorded from 
Huilla in Angola. 
The Diatom-flora, which is rather abundant, presented so many points 
of difficulty that, in order not to delay further the publication of these 
results, it has been thought advisable to omit it. A number of the Diatoms 
are, however, mentioned in the following enumeration of samples. 
B. Enumeration of the Samples. 
The following list serves as a key to the collections, the numbers of 
the samples only being cited in the subsequent systematic portion. With 
the exception of samples 78-87, which were collected by Mr. M. Lundie 
from Malan in the Willowvale District, all the samples were gathered by 
Miss A. Pegler, A.L.S., mainly from the district of Kentani. The numbers 
* 'Annals of the Bolus Herbarium/ ii, 1916, p. 3. 
