Nr. 1] SUBAERIAL ALGAE FROM SOUTH AFRICA 37 



samples examined from the enviions of Durban, for instance in 9, 57, 

 69, 85, 179, and in a s.ingle sample from Ihe «Bush», on the peninsula 

 between Donkergat and Jutten Island, Saldanha Bay, March Uth 

 (no. 368). It mostly forms a macroscopically visible bluish-green, 

 velvety coating on the bai'k of trees. The sheaths are 10 — 15 a 

 broiad, thiin, and of a bright yellowish brown colour. The cells 

 themselves are 8 — 12 u broad, and V^ — J4 as long, slightly tumid. 

 The filaments are fragile and dissociate easily. The specimens 

 found, agree very well with the'material in Collins, Holden and 

 Setchell, Phyc. Bor. Am. no.t258 and no. 258 a and in Raben- 

 HORST, Algen Europas, no. 352. 



