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(Ch. 7.)

(  Worms are poorly provided with sense-organs, for they cannot be said to see, although they can just distinguish between light & darkness; they are completely deaf & have only a feeble power of smell & probably not much taste; the sense of touch being alone is well developed. They can therefore learn little about the outside world, & it is somewhat surprising that they occasionally exhibit some skill in lining their burrows with  their castings & with  leaves, & in piling up their castings into tower-like constructions. But it is far more surprising that they they apparently exhibit some intelligence in their manner of plugging up the mouths of their burrows, instead a mere mere bllind instinctive impulse. They act in nearly the same manner as would a man who had to close a cylindrical tube with different kinds of leaves, petioles, triangles of paper &c, for they commonly select the  seize the object by the  more pointed end; but when these

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