The Freshwater Algae of Africa. 489 



50. Covering a rock, which was lying in a swampy piece of ground, 

 with a thick greenish yellow slime, top of Kasteel's Poort, Table Mt., 

 about 2500 ft. September 6th, 1908 (coll. E. P. Phillips.) (Zygnema 

 sp., Ulothrix subtilissima, Hnrmidium rivulare, Tribonema bombycinum 

 f. minor, Anabaena sp., Cylindrocystis crassa and C. ornata n. sp., 

 Netrium digitus, Peniwm phymatosporum and P. conspersum var. 

 capense n. var., Oosmarium specios^m^ var. simplex.) 



51. Attached to roots of a plant, exposed in a small pool, same 

 locality and date as No. 50. (Zygnema ericetorum, and a few Desmids 

 and Diatoms.) 



52-55. Muizenberg Vlei (in part growing on stem and leaf-sheath 

 of Typha). (Coll. Miss E. Stephens). (Toh/pothrix tenuis, Lyngbya 

 major. Oedogonium crassum and 0. crispum, Bulbochaete sp., Coleo- 

 chaete scutata, Aphanochaete repens, Gladophora glomerata? , a few 

 Desmids and numerous Diatoms.) 



56, 57. In a spring on Table Mt,, 3000-3500 ft. (Coll. P. de Moll). 

 (Mougeotia sp., Ulothrix oscillarina, Hormidium subtile, Ecballoci/stis 

 ramosa n. sp., Spondylosium pygmaeum var. capensis n. var., Eunotia 

 lunaris. ) 



C. Systematic Enumeration of the Species Observed. 



Note. — The species are numbered separately under the individual 

 genera, and in subsequent reports on the Algae of the Cape Peninsula, 

 additional records of localities for these species will merely be given 

 by reference to these numbers. I append for purposes of reference an 



Index to the Genera. 



Achnanthes, 586 Cocconeis, 587 



Amphora, 595 Cocconema, 595 



Anabaena, 577 Coelastrum, 512 



Ankistrodesmus, 514 Coleochaete, 537 



Aphanocapsa, 570 Conferva, 569 



Aphanochaete, 536 Cosmarium, 550 



Aphanothece, 570 ( 'yclotella, '585 



Apiocystis, 502 Cylindrocystis, 511 



Arthrodesnms, 560 Cylindrospermum, 578 



Cymatoplenra, 599 



Bulbochaete, 540 Cymbella, 595 



Calothrix, 581 Dichothrix, 581 



Chaetopeltis. 537 Dictyosphaerium, 513 



Chaetosphaeridium, 537 Diploneis, 588 

 Chamaesiphon, 571 



Chlamydomonas, 491 Ecballocystis, 194 



Chroococcus, 569 Epithemia, 595 



Cladophora, 524 Eremosphaera, 504 



Closterium, 544 Euastrum, 517 



