CD relates that Robert Brown is anxious to have [C. M.] Leman[n] elected librarian of the Linnean Society and urges JSH to come to vote for him. CD joins in the request.

Asks SPW to have obsidian specimens and book [Dieudonné de Gratet de Dolomieu, Voyage aux îles de Lipari (1783)] ready when he comes.

Asks for Gabriel Bibron’s address. He has two questions about snakes in S. America for which he wants answers, as he is preparing a new edition of his Journal of researches.

Asks for list of the Bahia Blanca fossil shells.

Suggests location of lost shell specimens.

Discusses GBS’s completion of his descriptions of fossil shells for the appendix to South America.

Discusses publication of his book [South America].

Has been invited to contribute geological instructions [to J. F. W. Herschel, ed., Manual of scientific enquiry (1849); Collected papers 1: 227–50]. Asks RO whether remarks on coral reefs appertain to geology rather than zoology.

Looks forward to visit by Owens.

Describes his new microscope and its advantages for dissecting. Suggests RO might discuss topic [in his contribution to J. F. W. Herschel, ed., Manual of scientific enquiry (1849)].

Obliged for drawings and coins. Cannot tell what the stone is.

Thanks RO for his note on Conchoderma hunteri [see Living Cirripedia 1: 153].

Has been very unwell; has lost four-fifths of his time. Will go to Malvern to try the water-cure for his vomiting, which regular doctors cannot cure.

Has done some pretty homological work with cirripedes.

Describes his research on cirripedes.

Comments on paper by AH ["Notice of a burrowing barnacle", Ann. & Mag. Nat. Hist. 2d ser. 4 (1849): 305–14]. Asks to borrow specimens.

Thanks AH for specimens of Alcippe.

Discusses capacity of Lithotrya to bore its own hole. Believes Arthrobalanus also makes cavities this way.

Asks to see paper on cirripedes by Sven Lovén.

Comments on paper by AH [see 1253].