86 



A. S. PEARSE 



Black background 

 5.25 p. M. Larger individual 

 had two white pieces on its 

 back, smaller one had one 

 white piece. 



White background 



12.20 p. M. The smaller in- 

 dividual bore four half white 

 papers and three black; the 

 larger one carried white paper. 



5.25 p. M. Large one had 

 no decorations; small one as 

 at 12.20. 



5.45 p. M. Water changed, both animals cleaned and all papers 

 throAvn away; animals interchanged from black to white back- 

 grounds and vice versa ; ten fresh strips each were put in of 

 white and black papers. 



Black background 



8.30 p. M. Large one had 

 two black papers on its back. 



July 9 

 7.20 A. M. Large individual 

 same as last night ; small one 

 had half a black paper on top 

 of head. 



10.30. Changed water 



1 1. 15. Large one same, 



small one had one white and 



one black paper on it. 



1.25 p. M. Large one had 



added a white paper to its two 



black. 



White background 



July 9 

 7.20 A. M. vSmall animal 

 had one piece of black on top 

 of head. 



8.30 A. M. Small one had 

 one black and one white. 

 10.30. Changed water. 

 1 1. 1 5. Small one has two 

 white and one black. 



1.25 p. M. Small one had 

 two black and two white; 

 large one nothing. 



Experiment 3 — July 9, 2.00 p. m. Two clean Libinias were 

 placed on a black background and two on white ; put ten pieces 

 of black and ten pieces of white paper in each dish. 



Black background 



3.00 p. m. Smaller individ- 

 ual had one black paper on 

 back. 



White background 



2.25. Larger individual had 

 one black piece on head ; 

 small one nothing. 



