Has forwarded FM's MS to Max Schultze, but did not read it.
Movement of stem apex in Linum.
Haeckel's paper on reproduction in certain Medusae.
Down. | Bromley. | Kent. S.E.
My dear Sir
I have received your interesting letter of
I forwarded immediately your M.S. to Prof. Max Schultze but I did not read it, for German hand writing utterly puzzles me, & I am so weak I am capable of no exertion: I took the liberty however of asking him to send me a copy if separate ones are printed; & I reminded him about the spunge paper.
I knew of the difference in the spicula, but your difficulty had not occurred to me; from analogy I should rather expect that spunges have existed with spicula of the 2 kinds, & that the one had ultimately preponderated over the other.
You will have received before this my book on Orchids & I wish I had known that
That is a curious observation of your daughter about the movement of the apex of the
stem of Linum & w
I can give you no Zoological news for I live the life of the most secluded hermit.
I occasionally hear from Ernst Haeckel who seems as determined as you are to work out the subject of the change of species. You will have seen his curious paper on certain Medusæ reproducing themselves by seminal generation at two periods of growth.
With sincere respect | Believe me my dear Sir | Yours very truly | Ch. Darwin
- f1 4949.f1The year is established by the relationship between this letter and the letter from Fritz Müller, 10 October 1865.
- f2 4949.f2See letter from Fritz Müller, 10 October 1865 and n. 10.
- f3 4949.f3CD added the information on branch tendrils contained in Müller's letter of 10 October 1865 to the paper he sent to the Linnean Society. See letter from Fritz Müller, [12 and 31 August, and 10 October 1865] and n. 1.
- f4 4949.f4Müller had sent CD the manuscript of a paper on the wood of twining plants; Müller's paper, which CD forwarded to Max Johann Sigismund Schultze, was published in Botanische Zeitung (Müller 1866). See letter from Fritz Müller, 10 October 1865 and nn. 6 and 7. CD's letter to Schultze has not been found.
- f5 4949.f5CD refers to Müller 1865c, a paper published in the journal edited by Schultze, Archiv für mikroskopische Anatomie. Müller had asked Schultze to send a copy directly to CD (see letter from Fritz Müller, 10 October 1865 and n. 8).
- f6 4949.f6In his letter to CD of 10 October 1865, Müller had discussed the problem of explaining, according to Darwinian theory, the development of two types of sponges, one with calcareous spicules, the other with siliceous spicules. Müller thought it unlikely that either form was the ancestor of the other. In his paper (Müller 1865c, p. 351), Müller proposed that the sponge Darwinella aurea represented the ancestral form from which both types could have developed, because it possessed spicules composed entirely of organic fibres with no mineral component.
- f7 4949.f7In his letter of 10 October 1865, Müller had requested the original English edition of Orchids. Before receiving Müller's letter, however, CD had already sent him the German translation (Bronn trans. 1862). See letter to Fritz Müller, 20 September ).
- f8 4949.f8CD refers to Rosa Müller. See letter from Fritz Müller, 10 October 1865 and n. 12.
- f9 4949.f9Haeckel 1865b described two species of medusae that he claimed were both capable of asexual and sexual reproduction (see letter to Ernst Haeckel, 6 December  and n. 9). In his paper, Haeckel had referred to Müller 1859, which discussed different forms of a related species, Liriope catharinensis (now placed in synonymy with Liriope tetraphylla).