HABIT FORMATION IN FROGS 



315 



the frog made three short hops, the last bringing it upon the 

 board. Then, as the caterpillar crawled, the frog made three 

 more short hops at intervals to keep up with the caterpillar. 

 The frog then bent down its head and body seemingly for the 



Figure 1. Sketch of the frog cage, as described on page '.U^, and frog, ilhistrating 

 the behavior of Rana damata (medium) while examining the hairy caterpillar. 

 The numerals 1 to 5 intlicate the successive positions of the frog while the cater- 

 pillar crawled along the board as shown by the line of dashes. After the cater- 

 pillar had fallen from the top of the cage into the dish of water, positions 6 

 and 7 were successively taken. The caterpillar was placed on the board at A. 

 For fuller description see experimental record under August 9. Not drawn 

 to scale. 



purpose of looking more closely at the caterpillar. Next, there 

 was a slight forward movement of the head, but I did not see 

 the tongue come out although I looked closelv. The cater- 



