R.Soc." XIX., page 393; also to Mr.Galton's letter to "Nature," April 27th, 1871, page 502.

This is a curious mistake; the letter in "Nature," April 27th, 1871, is by Darwin himself, and refers chiefly to the question whether gemmules may be supposed to be in the blood.

Mr.Galton's letter is in "Nature," May 4th, 1871, Volume IV., page 5.

See Letter 235.) (before seeing your essay) that perhaps the gemmules are largely multiplied in the reproductive organs; but this does not make me doubt that each unit of the whole system also sends forth its gemmules.

You will no doubt have thought of the following objection to your views, and I should like to hear what your answer is.