484 Annals of the South African Museum. 



cystis, of a second species of Sphaeroplea, and by the rediscovery of 

 Hydrodictyou ofricanvm, already known from the work of Yama- 

 nouchi.* The total number of new Algae described in the present 

 report is nineteen species and six varieties, apart from a number of new 

 forms, whilst the species here recorded number 238 in all (ninety-seven 

 genera). Nevertheless, it is obvious that the list of species based on 

 these collections cannot be regarded as typical of the algal flora of the 

 Cape Peninsula, since several common genera are quite unrepresented, 

 whilst of others only one or two species have been found. It is hoped 

 to remedy this state of affairs in subsequent reports, but for the 

 present it w T ould be misleading to attempt any general consideration of 

 the aspect of the freshwater algal flora. 



All the collections dealt with in the present report were made in the 

 year 1908, but owing to a misapprehension, considerable delay has 

 arisen in working them out. The fifty-nine^ samples were collected 

 from diverse localities by a number of different botanists, as will be 

 seen by reference to the enumeration of samples which follows. This 

 list is intended to serve as a general key to the collections, and in the 

 subsequent systematic treatment only the numbers of the samples are 

 given. 



My thanks are due to Prof. H. H. W. Pearson, who first started 

 sending me these collections, and to Dr. L. Peringuey, the Director of 

 the South African Museum, who has continued the work. I am also 

 exceedingly indebted to my colleague, Dr. E. J. Salisbury, wdio has 

 drawn many of the figures illustrating the present report and has made 

 several valuable suggestions. 



B. Enumeration of the Samples. 



1. On a sloping granite rock, over which water was trickling, quite 

 exposed to the sun, Kasteel's Poort Stream, Twelve Apostles' Range, 

 about 1000 ft. above sea-level. January, 1908 (coll. E. P. Phillips). 

 (Mougeutia sp., Zygnema sp., Oscillatoria tenuis, Gosmarium capense, 

 var. minor ) 



2. In a shallow mountain stream, well shaded by large trees, current 

 very slow, below Long Kloof on the Twelve Apostles' Range, about 

 2000 ft, above sea-level. February, 1908 (coll. E. P. Phillips). 

 (Tribonema bombycinum, f. genuina, various Desmids and Diatoms, 

 especially species of Eunotia.) 



3. Small stream by roadside, shaded by overhanging bush, Camps 

 Ba\, about five miles from Cape Town. March 1st, 1908 (coll. 



* Yanianouehi, But. Gazette, lv, 1913, p. 74. 



