Chap. II.
THEIR INTELLIGENCE.
91
| Nature of Object. | Drawn into the burrows, by or near the apex. | Drawn in, by or near the middle. | Drawn in, by or near the base. |
| Petioles of a Clematis, somewhat pointed at the apex, and blunt at the base | 76 | . . | 24 |
| of the Ash, the thick basal end often drawn in to serve as food | 48.5 | . . | 51.5 |
| of Robinia, extremely thin, especially towards the apex, so as to be ill-fitted for plugging up the burrows | 44 | . . | 56 |
| Triangles of paper, of the two sizes | 62 | 15 | 23 |
| of the broad ones alone | 59 | 25 | 16 |
| of the narrow ones alone | 65 | 14 | 21 |
If we consider these several cases, we can hardly escape from the conclusion that worms show some degree of intelligence in their manner of plugging up their burrows. Each particular object is seized in too uniform a manner, and from causes which we can generally understand, for the result to be attributed to mere chance. That every object has not been drawn in by its pointed end, may be accounted for by labour having been saved through some being inserted by their broader or thicker ends. No doubt worms
