408 



The specimens collected bore almost exelusively unilocular sporangia. 

 These were ovate, roundish-oval, sometimes sessile, sometimes borne 

 on quite short unicellular stalks; they sometimes sprang directly 



Fig. 69. Ectocarpus spec. a, b, c, d, e and f different parts of the plant with unilocular sporangia ; g and 

 li part of the plant with plurllocular sporangia. a, b, d and g 100 : 1 ; c 60 : 1 ; e, f and h 160 : 1. 



from the main filament, sometimes from branchlets. Both the 

 branchlets and the sporangia occnr all round the main filaments. 

 The unilocular sporangia are about 38 fi long and 29 fi broad. Here 

 and there a few plurilocular sporangia occur (fig. 69, g, h) with the 

 base almost ovate and tapering upwards, the length about 75 p, and 

 the breadth 27 /*. 



