The Freshwater Algae of Africa. 487 



26. Orange Eiver, Cape Province. June 25th, 1908 (coll. H. H. W. 

 Pearson). (Spirogyra spp., Nodularia harveyana, Closterimn libellula, 

 Cosmarium subbroomei var. pseudo-pearsoni, species of Nitzschia, 

 Hantzschia amphioxys.) 



27. On a concrete dam, about two miles from Matjesfontein, Cape 

 Province. Jnue 22nd, 1908 (coll. H. H. W. Pearson). (Tribonema 

 bombycinum f. minor, Phormidium autumnale, a few Diatoms). 



28. Modder Eiver, Orange Free State, free floating. July 28th, 1908 

 (coll. H. H. W. Pearson). (Spirogyra spp., Synedra amis.) 



29. 29a, 30, 30a, Reit River, attached to Myriophyllum. July 28th, 

 1908 (coll. H. H. W. Pearson). (Cladophora glomerata, Oedogonium 

 boreale, Stigeoclonium prostratum n. sp., Gongrosira, disciformis n. sp., 

 Nostoc hederulae, Rivularia natans, Anabaena circincdis (?), Lyngbya 

 rivulariarum, Coleochaete scutata, Aphanochaete re pens, Cosmarium 

 botrytris and var. tumidum, C. sexangulare var. subangulare n. var.,. 

 C. perpusillum, Eudorinella wallichii, Apiocystis brauniana, Oocystis 

 solitaria, various Diatoms, mainly epiphytic.) 



31. Riet, River, Orange Free State, attached to Willow leaves. July 

 28th, 1908 (coll. H. H. W. Pearson). (Much the same as the four 

 previous samples, with the absence of the Cyanophyceae). 



32. Modder River, Orange Free State, with Ranunculus, etc. July 

 28th, 1908 (coll. H. H. W. Pearson). (Zygnema stellinum, Spirogyra 

 juergensii and 8. hassallii, Anabaena catenula, species of Cosmarium, 

 Navicula, and Nitzschia,). 



33. Riet River, Orange Free State. July 28th, 1908 (coll. H. H. W. 

 Pearson). (Very similar to samples 29, 29a, 30, and 30a.) 



34. In a small pond, which was drying up, adjoining the "vlei," of 

 No. 17, Green Point Common; Algae forming a frothy green mass. 

 July 22nd, 1908 (coll. E P. Phillips). (Mougeotia sp., Spirogyra 

 sp., Scenedesmus obliguus.) 



35. From another small pond, in the same locality as No. 34, where 

 the water had completely dried up, leaving the Algae as a thick 

 green carpet on top of the moist ground. (Oedgonium sp., Spirogyra 

 sp., Closterium acerosum, Coxmarium subbroomei formae, Amphora 

 ovaiis.) (N.B. — Sample 34a is just the same as 35.) 



36. Forming a green scum on the surface of the water of a pond 

 formed by a natural spring in the Municipal Gardens, Cape Town. 

 July 22nd, 1908 (coll. E. P. Phillips). (Oedogonium pisanum, 

 Chlamydomonas intermedia and C. reinhardi, Navicula cryptocephala, 

 N. interrupta, Nitzschia palea.) 



37. In a little pool, formed by water flowing from a leaking water- 

 pipe, Pipe Track, slopes of Table Mt., about 1000 ft, July 19th, 



