346 



GENERATIVE APPARATUS OF FUCACEJE. 



receptacles of F. platycarpus, its interior is seen to be a nearly 

 globular cavity (Fig. 162), lined with filamentous cells, some of 

 which are greatly elongated, so as to project through the pore by 



Fig. 162. 



Vertical section of receptacle of Fucus platycarpus, lined with 

 filaments, among which lie the Antheridial cells, and the Sporan- 

 gia containing octospores. 



which the cavity opens on the surface. Among these are to be 

 distinguished, towards the period of their maturity, certain fila- 

 ments (Fig. 163, a) whose granular contents acquire an orange 

 hue, and gradually shape themselves into oval bodies (b), each 

 with an orange-coloured spot, and two long thread-like appendages, 



