Asks about collection of mollusc specimens he had lent to Richard Owen.
Asks about seeing cirripede collection of the College.
Comments on larva of Scalpellum.
Down Farnborough Kent
I am going to beg of you a great favour. Some years ago I took all my collection of
Mollusca in Spirits to Mr Sowerby
& to the best of his recollection & mine the more interesting forms were
all sent to Prof. Owen, including many Cirripedia. I formerly
spoke to Prof. Owen on the subject The collection was originally in square green glass
(or white round) bottles. The specimens are tied up in coarse [rags]
with a little tin
I do not know whether you would care for some specimens, but I could give you the larva in the first stage of Scalpellum, in which with my best power I cannot see any striæ in the muscles of the legs.—
Pray believe me dear Sir | Yours very faithfully | C. Darwin
In the second larval condition, the striæ are most plain.—
- f1 1114.f1Quekett, assistant conservator of the Royal College of Surgeons and a well-known microscopist, is the most likely recipient of this letter.
- f2 1114.f2The conjectured date is based on the assumption that CD had met Quekett for the first time in the interval between this letter and the letter to James Scott Bowerbank, [January–August 1848]. It is unlikely that the letter is later than 1848, as there is no record of any plans to visit London in October during 1849 or 1850. He did visit London in October 1848, see n. 5, below.
- f3 1114.f3George Brettingham Sowerby had identified recent species of molluscs for CD's work on South America and Journal of researches 2d ed. These specimens would have been preserved in spirits.
- f4 1114.f4See Correspondence vol. 2, letter to W. J. Broderip, 19 January , for Richard Owen's intention to look at CD's shells in spirits. Owen was Hunterian professor at the Royal College of Surgeons.
- f5 1114.f5CD visited his father in Shrewsbury, 10–25 October 1848, and he usually broke his journey in London when travelling between Down and Shrewsbury.
- f6 1114.f6This point was of interest in that an absence of transverse striae in muscles indicated that the appendage could not be moved voluntarily. CD later discovered that embryonic tissues could be destitute of striae ‘and yet perform voluntary movements’, citing Schmidt 1852.