REACTIONS OF BRANCHIPUS TO EXTERNAL STIMULI 



233 



experiment, and an examination with the microscope showed them 

 to be infected with a parasite. Their behavior, therefore, could 

 not be accepted as normal. The Branchipus season being shorter 

 than usual, no more material could be procured, and consequently 

 the experiment could not be repeated. 



TABLE 2 

 25 c.p. light 



12 c.p. light 



MALE NO. 2 



TIME IN SECONDS 



NO. OF VIBRATIONS 



NO. OF VIBRATIONS 

 PER SECOND 



Average. 



2.67 



