34 



PLANT LIFE 



by fission. This is betrayed by their aggrega- 

 tion in pairs and groups of cells which have 

 obviously sprung from a single parent. But 

 an interesting and important feature of their 

 development consists in the fact that, after 



II 



Fig. 2. Apiocystis Brauniana. I, Mature Plant. 

 II. Younger Plant. G, The gelatinous outer layer of the 

 membrane. 



they have been formed, they can modify 

 their positions. Thus all of them come to lie 

 just beneath the periphery of the jelly, and 

 are not uniformly distributed through it as 

 might have been expected. This arrange- 

 ment is one which secures evident advantages 

 from the point of view of suitable illumination. 



