262 



A. M. Banta 



TABLE III 



AsELLUs COMMUNIS (36 individuals) 

 February 23, 1906 

 Previous exposure: disuse daylight 

 Illumination: horizontal, 5 CM.; lamp at Seclion-6 end 

 In tank within glass ring 55 minutes before experiment began 



utes after the light was turned on only 8 or lo individuals were in 

 the positive end of the tank, at 11:44, nearly an hour after the 

 experiment began, 18 were in the positive half and their positions 

 were very different from what they had been three minutes be- 

 fore (11:41), when 14 were in the positive half of the tank. 



This general activity was very pronounced at 11 :05, 15 minutes 

 after the experiment began. At 11:41 I made the following note 

 in my record book "quite active and apparently a general move- 

 ment toward + is beginning." This apparent general movement 

 was due largely to the photokinetic activity, which at this par- 

 ticular time happened to produce a general movement in a posi- 

 tive direction. At 12:23 the activity was still very marked, but 

 at 2:25 it was much less pronounced, and at 3:45 and 5:05 there 

 were only slight movements. 



