LIFE HISTORIES OF ALG^E 255 



that is, for the maintenance of the individual; at another 

 time the entire plant body functions reproductively, 

 that is, for the maintenance of the race to which the 

 individual belongs. 



246. Life History of Pleurococcus. The simple life- 

 history of Pleurococcus may be briefly indicated as follows: 



OUTLINE OF LIFE HISTORY OF PLEUROCOCCUS 



Unicellular plant 



4- 



Cell-divisions 



4- 



Temporary cell-aggregates 

 Separation of daughter-cells 



4 4 i 4, 



Unicellu- Unicellu- Unicellu- Unicellu- 

 lar plant lar plant lar plant lar plant 



