Sends specimens of sessile cirripedes for corroboration of their cementing apparatus.
Absence of anus in Brachiopoda and Alcippe cirripedes.
Down Farnborough Kent
I send a few specimens of the cementing apparatus of Sessile Cirripedes, & sh
I saw some time ago that you do not find any anus in the Brachiopod Molluscs; I may just mention that this is precisely the case with the Cirripede Alcippe in which rectum & anus are absolutely null.—
I have this morning just received your Article on Mollusca; I
am particularly obliged to you for having sent it to me, as I had heard of it
& shall be very glad to read it, as indeed everything which you write. But as
far as criticism goes, I really do not know enough of the subject to pretend to offer an
opinion worth the paper on which it sh
Yours very truly | C. Darwin
This note & specimen &c all goes in a parcel for
Please look at specimens in following order, with good & varying light
& moderately high powers. I sh
- f1 1635.f1Dated on the basis of the reference to T. H. Huxley 1855a (see n. 7, below).
- f2 1635.f2See letters to T. H. Huxley, 8 September  and 13 September . Huxley had examined specimens of cirripedes during his visit to Tenby the previous summer. CD had found the Balaninae, a sub-group of the Balanidae (sessile cirripedes) difficult to dissect, and he had therefore primarily based his views on the Lepadidae (pedunculated cirripedes) (see Living Cirripedia (1854): 134).
- f3 1635.f3See Living Cirripedia, (1854): 134, where CD described the cementing apparatus in Lepadidae. It was his view that ‘the two cement-glands, with their contents, actually consist of ovarian tubes with their contents … in a modified condition.’
- f4 1635.f4CD described the ovigerous fraena of the Lepadidae and the glandular bodies associated with them in Living Cirripedia (1851): 58–61.
- f5 1635.f5T. H. Huxley 1854b.
- f6 1635.f6Living Cirripedia (1854): 546.
- f7 1635.f7T. H. Huxley 1855a. CD's copy is in the Darwin Pamphlet Collection–CUL.
- f8 1635.f8John Percy, metallurgist, was a colleague of Huxley at the School of Mines.