64

Feb 20th

103 triangles drawn into Burrows. 18 drawn in by middle, leaving 85 drawn in by one of the 3 angles. Now 64 drawn in by apex, 21 by one of the 2 basal & obtuse angles or an average 1 1/2 by each basal angle. [sketch]

Feb 21st Galton insisted much on organisation of showing that they do not seize hold of the apical angle at some distance from apex — I must say actual apex, or say near it, for as they drag the paper over the horizontal ground & then have to turn perpendicularly drawn into the burrow, the first part beyond the mouths now is very likely they doubled up, & thus as in I could judge does not occur often — Galton asked how that they cd judge of shape of object, for which I have seen of their behavior will learn. I do not believe that they crawl in close contact over which object, but track it in many places with the

[Darwin was in London during February and March 1881 when he spoke to Francis Galton.]

64v

ant. end of body, which as already remarked seems to sense as an organ of touch. We shd remember how quaintly perfect touch became in man, when he is deprived of other senses, as is to case of a worm.