THE PROTEUS ANIMALCULE. 



159 



V3SS&&Sf'?&&& 



- o*o"r*'o<!?sr-S -.-.-.-..: 



V:V;#j.5^i^*ff^:{ 



V," -'. .?:,. :---:'-.-.:. c - - ^ IT :-'.- :-.-- <-J- '.!'., .".': 

 ^5*SSs 



A 



FIG. 84. AmceJja Proteus, from life x 300. The arrows indicate the direction of the 

 protoplasmic currents; H, nucleus; c.r, contractile vacuole ; /.r, f ood-vacuole ; 

 u\r, 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. 



