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].

Discusses mollusc specimens and related notes sent to AH. Thanks him for cirripede specimens. Discusses various cirripede species.

Discusses capacity of some cirripedes to bore into rock. Describes progress of his research.

Asks whether he can borrow from Joshua Alder an article [Sven Ludvig Lovén, "Ny art af Cirripedia Alepas squalicola", Ofers. Kongl. Vetensk. Acad. Förh. 1 (1844): 192–4] in order to have the plate copied. Asks to borrow additional specimen of Ibla.

Discusses capacity of some cirripedes to bore into rock.

Mentions Alcippe specimens borrowed from AH.

Relation of sexes in Ibla and Scalpellum.

Discusses Alcippe. Asks to borrow specimens. Would like to hire fishermen to collect specimens.

Has found plenty of male Alcippe on specimens. Would eventually like more specimens. Did not recognise males at first. Has found Alcippe difficult to make out.

Describes anatomy and growth stages of Alcippe in close detail.

Thanks AH for assistance. Compares Alcippe to South American boring cirripedes.

Can AH spare Alcippe specimens for British Museum?

C. S. Bate has found Alcippe off Plymouth.

Discusses returning specimens to AH.

Owes to AH the discussion of powers of excavation of Verruca in Living Cirripedia [vol. 2 (1854)].