CANADA PORCUPINE 47 



TABLE VII 

 Form Study. Porcupine No. 6 



13, 13, 17, 20. 



13, 16, 20. 

 20. 



12, 12, 11, 10. 

 18, 20. 



15, 13, 15, 15, 15, 10. 13, 9, 11. 

 15, 13, 13, 13, 17, 12, 15, 15, 17, 15, 13, 13, 17, 13, 



15, 16, 16, 20. 

 20. 



15. 17, 14, 18, 18, 14, 20. 



16, 17, 17, 18, 15, 18, 20. 



16, 18, 17, 20. 

 " " Rect 20. 



Six-wise ' 6, 6, 6, 10, 8, 10. 15, 14, 17. 12, 13, 14, 20. 



C, E, C-T, H-C, similar base 16, 20. 



" " " " " top 20. 



" " " " " left 9, 15, 16, 20. 



" " " " " right 14, 16, 20. 



Six-wise. New paint 19. 



In table VII the initials at the left represent the forms used pair-wise and the 

 positions in which they were exposed. C-T represents the irregular form which 

 corresponds to the circle in one-haLf and the triangle in the other half. In the 

 same way, H-C represents a similar combination form composed of parts of the 

 hexagon and the circle. 



TABLE VIII 



Form Study. Porcupine No. 7 



18, 16, 20. 



14, 13, 10, 16, 13, 18, 16, 20. 

 20. 



15, 15, 17, 13, 15, 15, 15, 19, 17, 17, 16, 20. 



11, 9, 8, 8, 10, 10, 11, 11, 11, 11, 13, 12, 11. 



12, 9, 10, 12, 12, 14, 15, 15, 10, 12, 13, 16, 20, 18, 17, 20. 



13, 13, 14, 13, 13, 16, 18, 17, 11, 16, 15, 11, 13, 12, 

 10, 10, 15, 10, 14, 18, 14, 15, 20. 



20. 



17, 17, 20. 

 20. 

 20. 

 12, 11, 16, 20. 



C, E, C-T, H-C, similar base 12, 13, 13, 13, 16, 15, 20. 



" " V " " " top 20. 



" " « " " left 15, 20. 



" « " " " right 20. 



Six-wise. New paint 18. 



Table VIII is constructed on the same general plan as table VII. 



learned to discriminate the circle from the triangle in both 

 positions as well as from the circle-triangle when the apex of 

 the latter was down; but both failed when the irregular form 

 was inverted, making the base lines similar. The square gave 

 considerable difficult v to both animals. No. 6 suffered three 



