Chap. II. THEIR INTELLIGENCE. 77 



Accordingly, pine-leaves were scattered on 

 the ground in places far removed from any 

 pine-tree, and 90 of them were drawn into 

 the burrows by their bases. Only two were 

 drawn in by the tips of the needles, and these 

 were not real exceptions, as one was drawn 

 in for a very short distance, and the two 

 needles of the other cohered. Other pine- 

 leaves were given to worms kept in pots in a 

 warm room, and here the result was different ; 

 for out of 42 leaves drawn into the burrows, 

 no less than 16 were drawn in by the tips 

 of the needles. These worms, however, 

 worked in a careless or slovenly manner ; 

 for the leaves were often drawn in to only 

 a small depth ; sometimes they were merely 

 heaped over the mouths of the burrows, and 

 sometimes none were drawn in. I believe 

 that this carelessness may be accounted for 

 either by the warmth of the air, or by its 

 dampness, as the pots were covered by glass 

 plates ; the worms consequently did not care 

 about plugging up their holes effectually. Pots 

 tenanted by worms and covered with a net 

 which allowed the free entrance of air, were 

 left out of doors for several nights, and now 72 

 leaves were all properly drawn in by their bases. 



