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OF THE CHARACEJ2, 
but granules of chlorophyll (the substance which gives 
the green colour to plants), and they are being forced 
along by a current of mucilaginous matter, termed proto- 
plasm. What the purpose of this never-ceasing rotation 
may be has not yet been discovered. 
In the Characea3, also, may be observed the movements 
of the spiral filaments or spermatozoids, which swim 
actively in water, on being pressed out of the globule or 
antheridium. 
