14 VICTOR E. SHELFORD AND W. C. ALLEE 



Chart IV 



Showing the establishment of apparent preferences by groups of individuals of 

 Abramis. 



In experiment 1A an apparent preference already existed for the right hand 

 end. An apparent preference for the left hand end was established and broken 

 again by introducing boiled water as indicated. In experiment 84 the graphs of 

 experiment and control are very similar during the first ten minutes. The apparent 

 preference for the left hand end of the control tank was modified and apparently 

 broken by repeated drivings indicated by arrows, and by confining the fishes in 

 the avoided end during the nineteenth minute. The control fishes of experiment 

 58 established an apparent preference for one end after ten minutes and for reasons 

 unknown. For further explanation see Chart I. 



