304 REJUVENESCENCE IN NATURE. 



the process it will be clear, that in Bulbochtete, as in 

 (Edogonium, a concentration of the formative contents, at 

 the cost of the sterile sister-cell, is connected with the 

 production of the cell destined to form a spore, but that 

 there is not any union of the contents of two previously 

 separate cells. These cases, therefore, are allied, not so 

 much to the phenomena of conjugation, as to the pheno- 

 mena of division into cells of unequal power and of 

 different destination, mentioned under B* (p. 250). 



