Cole and Long, Visual DiscriJinnation in Raccoons. 677 



TABLE 21. 



VBT 2 in Group 5. — Papers inside the Glasses. 



Raccoon No. 3. 



* Due to error in counting trials. 



As a further means of excluding the pigment odor, we coated the 

 paper-covered glasses of Group 20 with shellac, with the result shown 

 in Table 22. 



TABLE 22. 

 VS 1 in Group 20.— AH Glasses Covered with Shellac. 



In the two tests recorded above the two animals should have failed 

 to discriminate if they were selecting the food-glass by the odor of 

 the pigment. 



In case of discrimination by odor the raccoons should choose cor- 

 rectly in the dark. They were tried in the dark on Group 30 which, 

 it will be remembered, they had learned very readily by daylight. 

 Each animal was given thirty trials. Raccoon "No. 2 selected the 

 food-glass six times, IvTo. 3 selected it five times. Apparently these 

 choices were made only when the food-glass was the first one to which 

 they came. In all other cases they pulled at every glass in order until 



