Asks for whatever numbers, since 1845, of the Journal [of the Royal Geographical Society] he, as a Fellow, is entitled to receive gratis.

Describes progress in illustration of fossil cirripede specimens. Thanks for answers to questions. Comments on hermaphroditism. Describes his discovery of parasitic male cirripedes.

Encloses a letter from J. D. Hooker [see 1257], thinking that WJH would like to see it.

Wants accurate information on "the economy of nature". Is interested in how far the struggle with other species checks the northern range of any species.

Thanks John Storey for information.

Urges dispatch on illustrations [for Fossil Cirripedia]; CD’s MS has been ready for some time and all depends on JdeCS. Suggests a way to hasten progress.

Discusses his account.

CD wants Lepadidae drawings [for Fossil Cirripedia] harder, with lines of growth more distinct; he wants no shading or similarity to lithography, which he thinks has harmed natural history. He realises that mutilated specimens may make accuracy difficult.

Discusses depths at which ripple-marks appear on sea-floor.

Personal and social comment.

Mentions receiving Agassiz’s Lake Superior [1850].

CD is pleased with the drawings for Fossil Cirripedia but wants a few corrections which he would like very soon.

On Himalayan stratigraphy. Believes JDH’s observations of glacial action are the first ever done east of Urals.

Barnacles and the species theory; impressed with variation.

Effect of CD’s species sketch on JDH’s view of willow systematics.

Thanks CSB for drawings of [cirripede] larva and for permission to cite unpublished paper ["On the development of the cirripedes", Ann. & Mag. Nat. Hist. 2d ser. 8 (1851): 324–32]. Describes method of preserving specimens. Mentions Balanus common on tidal rocks at Tenby.

Thanks LA for presentation copy of his book, Lake Superior [1850].

Comments on species of cirripedes sent by LA and A. A. Gould.

Asks him to send additional cirripede specimens.

Has received plates. Gives instructions for scale and arrangement of engravings.

An enquiry about the availability, size, and cost of cork-lined boxes for entomological collections.

Reports on the fossil cirripedes sent him; several are new, some are "elegant".

Thanks CSB for cirripede larvae.

Has been unwell.

Cannot see transverse articulation referred to and does not believe in it.

Sends species synonyms.

Discussion of Chthamalinae.

Suggests using asphalt to seal specimen containers.

Comments on mouth of larva.

CD asks for the return of a specimen [to be used for illustration in Fossil Cirripedia (Lepadidae)], so he can do some identifying.

J. S. Bowerbank has again asked on behalf of the Palaeontographical Society what progress has been made.

Returns one figure and sends two minute new species to be figured [for Fossil Cirripedia (Lepadidae)]. "Pray observe how time slips by."

CD insistently requests JdeCS to have all rough illustrations [for Fossil Cirripedia (Lepadidae)] done in time for next Council meeting of the Palaeontographical Society.