ACQUIRED SPECIFIC REACTIONS TO COLOR 



171 



colors of the papers were red, yellow, green, blue and black. 

 These papers were not standardized with reference to any code. 

 Results: At the end of 36 hours, no individual had used any 

 piece of paper for decoration. During the time that the crabs 

 were under observation, they moved about the bottom of the 

 aquarium, trying vainly to escape. At times they remained 



TABLE VII 



Shows the Reactions of Individuals which Had Been Exposed to 



Blue Light 



R Y C B W 

 Figure 7. Shows the curve of distribution of the reactions of Table VII 



motionless and busied themselves with "preening" their hairs. 

 They seemed not to notice the presence of the paper. 



Second Series 



IX-9-1912. 5 P. M. Five crabs, two males and three females, 

 were carefully cleansed of all decoration and placed in the aqua- 

 ria. Five pieces, 10 x 10 mm., of each of five colored papers 

 were placed in the aquaria. A piece of dead clam was also 

 added. The animals ate voraciously and "preened" themselves. 



