OBSERVATIONS ON UNICELLULAR FORMS 



77 



3:48 P.M. 



3:54 



8:57.5 



0.5 mm: 



FiG. 8. Camera drawing representing different stages in the process of orien- 

 tation of Amoeba proteus. i, Amoeba oriented in light nn before light //is turned 

 on; 2-9 successive positions at the time indicated on each after light II is turned on. 

 Arrows represent the direction of streaming of protoplasm in pseudopods. In 

 those which do not contain arrows there was no noticeable streaming at the time 

 the sketch was made. // and nn, direction of light. 



