ths mm 





FlG. 38. Vaucheria. 



A, tangled filaments of the living plant, showing mode of branching. 



B, extremity of a filament, showing cell -wall (c. w) and protoplasm 

 with chromatophores (chr\ and oil-drops (o\ The scale above applies 

 to this figure only. 



c 1 , immature sporangium (spg) separated from the filament by a _sep- 

 tum c 2 mature sporangium with the spore (sf>) in the act of escaping ; 

 c 3 , free-swimming spore, showing cilia, colourless ectoplasm containing 



