62 Annals of the South African Museum. 



At Kopjes Kraal (2,300 feet) were two species of Enteromorpha, 

 E. intestinalis, and a very slender species which I have described as 

 E. gracillima. 



4. Little Namaqualand. Stagnant pools at Brakrivier (1,600 feet) 

 yielded only a few Diatoms, whereas a varied assortment of algae 

 occurred at Pella (1,500 feet) in the wet mud on the banks of a dam. 

 The most interesting of these was an undescribed species of Pedi- 

 astnmi. Some collections from running water at Henkriesfontein 

 (3,000 feet) were chiefly remarkable for the abundance of Diatoms. 

 A pool at Aggenys (6,000 feet) was the only locality from which 

 Navicula cuspidata was observed. Collections from Dabainoris 

 (1,500 feet) and Kamiebies (3,000 feet) yielded mostly Diatoms, 

 although one collection from the latter place contained the only 

 fruiting specimens of Spirogyra collected on the expedition. A 

 floating mass of algae in a dam at Kozynbosch (2,800 feet) consisted 

 of Sphceroplea annulina with ripe oospores, (Edogonium Welwitschii 

 and (E. Pringsheimii in a state of fructification, several members of 

 the Protococcales, and about half a dozen Desmids, one of which, 

 Cosmarium subcostatum forma minor, was in a state of conjugation. 



A small spring at Nieuwefontein (2,700 feet) contained a form 

 (forma breviramosa) of Enteromorpha gracillima. 



5. Great Namaqualand. On drying mud in L6 wen's Eiver at 

 Gawachab (2,100 feet) an undescribed species of Homa'othrix 

 occurred amongst a dense tangle of moss-protonema. The most 

 interesting alga at Griindoorn (3,400 feet) was (Edogonium inversum, 

 which was in fine fruiting condition attached to the wall of a cattle- 

 trough. In a warm spring at Warmbad (2,300 feet) was a quantity 

 of Symploca thermalis and Aphanothecc caldariorum. 



6. Cape Kegion between Ceres and Karoopoort. A few 

 Diatoms and Chrooeoccaceous algae were observed near Leeuwefon- 

 tein (2,300 feet). 



The total number of algae which could be accurately identified was 

 140, consisting of 38 species of Myxophyceae, 48 species of Bacil- 

 larieae, and 54 species of Chlorophyceae. There were also about 14 

 other species of algae which were not in a condition for accurate 

 identification. 



The Myxophyceae were fairly representative of the whole group, 

 with the exception of the wet-rock families of the Scytonemaceae 

 and Stigonemaceae. 



Diatoms occurred in all the situations from which algae were 

 collected, and were often very abundant. Amphora coffceiformis 



