THE PROTEUS ANIMALCULE. 



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Fig. H.—Amccba Proteus, from life X 300, The arrows indicate the direction of the 

 protoplasmic currents; ?», nucleus; c.v, contractile vacuole; f.v, food-vacuole ; 

 w.v, water-vacuole. A shows the texture of the protoplasm. B is an outline of 

 the same individual four minutes later ; the upward currents at the right of Fig. 

 A have stopped, reversed, and the main flow is now towards the left. 



