RECORD: Darwin, C. R. 1881.03.20. Several narrow & 1 broad [pieces of paper] which had been drawn by bases [Earthworm research notes] CUL-DAR65.58-59. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Prepared and edited by John van Wyhe 7.2025. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR65 contains materials for Earthworms.


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March 20/81/ Several narrow & broad which had been drawn by base into burrow, had whole base or one corner much bent — Then were left for some hours in with & then repeatedly shaken beneath the wetter, by the few worms not thus attracted & when dried were strongly bent, though not so much as at first — Even passing them repeatedly with some force between 2 fingers under water did not straighten them, except in one when the flower had been at first very slight — The dirt, owing to slime from worm's body adhered pertinaciously.

Therefore a proportion of them drawn in by apex with any trace of bent base is very small we may feel sun this worm do not draw in the [triangle] by any angle & then reject those which will not go in with. But for analogy of leaves & what I saw with [triangles] it is probable that they

52v

N.B when the base clear, as well as not bent it shows that the basal part cannot even have been tried in mouth of burrow — when dirty it does not from this its has been tried, for many have been thus many dragged to near burrow.

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draw them into any way to near burrows & then perceive by trench which is bent in the end or gently try to insert them & if they will not go in wall (& then will apply the petiole end of leaves) try some other methods. The latter contingency is the most probable; but even this shows intelligence, for generally the ordinary & instructive actions of most animals are passed in the most senseless manner — Thus — ants (worm wiser than Sphex)

I have said intelligence — give [discussion] — Romanes

I think first abstract of all the cases, without saying about how a man wd prefer to work & the reason on the cases.


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 28 July, 2025