486 Annals of the South African Museum. 



E. P. Phillips). (A rich growth of unicellular and colonial forms 

 mainly composed of Scenedesmus quadricauda and 8. acuminatum, 

 Selenastrum gracile, Ankistrodesmus falcatus and var. sjoirilliformis, 

 Cosmarium laeve, Microcystis sp., a few Diatoms, species of Trachelo- 

 monas (including T. radiosa n. sp.), Phacus, and Lepocinclis.) 



15. The same, but Algae growing on the brick walls of the pond. 

 (Phormidium valderianum, Coelastrum morus f. capensis, Oedogonium 

 sp., Calothrixfusca, and the same forms as in 14, but in smaller quantity, 

 and together with Pleurococcus Icoettlitzii, Achnanthes minutissima, and 

 species of Gomphonema.) 



16. Small pool of water in the hollow of a rock, Table Mt., 3000 ft. 

 alt. April 12th, 1908 (coll. E. P. Phillips). (Mesotaenium chlamydo- 

 sporum, Schizochlamys hyalina n. sp., Calothrix sp., Stigonema hormo- 



ides.) 



17. "Vlei" on Green Point Common, dry for the greater part of 

 the year, but becoming filled during winter. Algae occurring in 

 large masses on edge. April 28th. 1908 (coll. E. P. Phillips). 

 (Sphaeroplea africana n. sp., Oedogonium sp.) 



18. Large " vlei"' at Maitland, about three miles from Cape Town ; 

 Algae submerged and free, forming patches of a light green colour. 

 July 11th, 1908 (coll. E. P. Phillips). (Sphaeroplea africana n. sp.) 



19. Small pond about 500 yards from the " vlei " of the previous 

 sample. July 11th, 1908 (coll. E. P. Phillips). ( Ulothrix suMilissimd, 

 Scytonema mirabile, Ecballocystis simplex n. sp., Cosmarium capense 

 var. minor, Staurastrum hexagonale n. sp.. Cylindrocystis crassa, 

 Mougeotia spp.) 



20. Same "vlei " as No. 18. (Hydrodictyon africanum.) 



21. Valkenberg Vlei. June 28th, 1908 (coll. W. T. Saxton). 

 (Oedogonium sp., Trochiscia aspera, Ophiocytium arbuscula, Synedra 

 pulchella, species of Gomphonema.) 



22. Small stream, Kloof Boad, Cape Town (coll. W. T. Saxton). 

 (Zygnema sp., Oedogonium sp., Hormidium rivulare.) 



23. Valkenberg Vlei. June 3rd, 1908 (coll. W. T. Saxton). (Spiro- 

 gyra sp., Oedogonium sp., Aphanothece microspora.) 



24. Valkenberg Vlei. June 28th, 1908 (coll. W. T. Saxton). (Spiro- 

 gyra sp., Oedogonium sp., Cosmarium pseudobroomei var. convexum, 

 C. subbroomei var. pseudo-pearsoni n. var., Closterium malinvernianum 

 f. major, Pludorina elegans, Trachelomonas hispida, Peridinium sp.) 



25. Modeler Eiver, Orange Free State. June 29th, 1908 (coll. 

 H. H. W. Pearson). (Spirogyra spp., Oscillatoria limosa, scanty 

 Desmids, Melosira varians, species of Epithemia, Cymhella, Navicula, 

 and Nitzsclria.) 



