Discusses cirripedes collected by JDD.
Gratified that he agrees "to some extent" with CD's views on coral reefs.
Mentions his health.
Asks for JDD's publication on cirripedes.
Sends message from William Baird concerning Crustacea research of J. O. Westwood.
Mentions Joseph Leidy's discovery of cirripede eyes.
Down Farnborough Kent
I am sincerely obliged to you for your very kind letter, & the information
sent. I am sure from what you say, that had it been in your power you
You cannot imagine how much gratified I have been, that you have, to a certain extent agreed with my coral-island-notions.—
To return to the cirripedia: I am allowed to work only 2 hours daily (after
5 months doing nothing) so that it will be long before I publish: the
cirripedia are moreover very troublesome, from their great variability, & the
necessity of examining whole animal & inside & outside of
shell.— Possibly you may publish your specimens before my monograph; in that
Your Sporillus sounds very curious; I
I am particularly obliged to you for pointing out to me your notice on the
metamorphosis of the cirripedia in Silliman's Journal, for I sh
I have seen D
I quite agree with you that the cirripedia are Crustacea— I have lately got a Suctorial form, which bears about same relation to common cirripedia, as Lernæa does to common Crustacea.—
Once again allow me to thank you for the kindness & frankness of your letter, & believe me, dear Sir, with every good wish & much sympathy | Yours sincerely | C. Darwin
P.S | I wrote to D
- f1 1259.f1CD had asked to borrow cirripede specimens collected by the United States Exploring Expedition, 1838–42, in letter to J. D. Dana, 12 August . It appears that Dana was unable to provide these, presumably because they were the property of the United States government.
- f2 1259.f2Dana had published observations on cirripede metamorphosis (see n. 6, below) and was at this time at work describing the Crustacea from the United States Exploring Expedition (see n. 4, below).
- f3 1259.f3Evidently a topic mentioned in Dana's letter which is now missing. Dana had discussed CD's theory of coral reefs unfavourably in Dana 1843. See also letter to Charles Lyell, 4 December .
- f4 1259.f4Dana, naturalist to the United States Exploring Expedition, was preparing a report on the Crustacea (Dana 1852–3) from the Wilkes expedition. According to Bartlett 1940, p. 657:
When he [Dana] heard that Darwin was at work on barnacles, he did little more with this particular subdivision of the Crustacea than to turn over the adult shelled forms to his conchological colleague Gould, and to publish himself certain observations that he had made during the cruise which convinced him that the Cirripedia were not Mollusca.Augustus Addison Gould prepared the Mollusca and shells (Gould 1852–6) of the expedition after the resignation of Joseph Pitty Couthouy (Bartlett 1940, pp. 650–2).
- f5 1259.f5Acasta sporillus (Living Cirripedia (1854): 319–21).
- f6 1259.f6Dana described how he examined the metamorphosis of several species of pedunculated cirripedes in Dana 1846, p. 225 n.
- f7 1259.f7In Dana 1846, p. 225 n., Dana stated that the pedicel (peduncle) of the Lepadidae (which he called Anatifæ) corresponded to a pair of antennae in the larval stages. CD, however, maintained that the peduncle and all the externally visible parts of Cirripedia corresponded to the three anterior segments of the head of a crustacean. CD further believed that the prehensile antennae were associated with the fronto-lateral horns of the larvae and that they developed into the means of attachment for the organism (Living Cirripedia (1851): 9–10, 28). See also letter from J. D. Dana, [before 29 December 1850], and letter to J. D. Dana, 29 December .
- f8 1259.f8Leidy 1848.
- f9 1259.f9CD probably refers to the suctorial cirripede Proteolepas bivincta, parasitic within the sack of another barnacle. He described this unusual form in Living Cirripedia (1854): 602:
I can hardly express the perplexity which I felt when I first examined Proteolepas, and when I naturally mistook the mouth for the entire head, for I saw, as I thought, the antennæ in direct connection with the second segment of the body, posteriorly to the mouth! It was quite as monstrous and incredible an inversion of the laws of nature, as those fabulous half-human monsters, with an eye seated in the middle of their stomachs.Proteolepas has since been shown to be an isopod crustacean.
- f10 1259.f10William Baird, of the zoological department of the British Museum and author of a monograph on the British Entomostraca (a class of Crustacea) published by the Ray Society (Baird 1850).
- f11 1259.f11Westwood and Bate 1863–8, a treatise on the sessile-eyed Crustacea, intended to supplement Bell 1853, on the stalk-eyed Crustacea.