Thanks AH for assistance and Joshua Alder for his kindness. Ibla specimens offered would not aid him.

Asks to re-examine specimen of Scalpellum. Discusses publication [of Fossil Cirripedia] by Palaeontographical Society.

Discusses the Jura blocks.

Read a letter from CD. Resolved that labels be printed for the backs of each number of monograph printed and forthcoming.

James Wilson reports case of salmon hybrids.

Herrings inhabit freshwater lake in Scotland during winter.

JDH will edit juror reports for the Great Exhibition.

Thanks for report [on echinoderms, Ann. & Mag. Nat. Hist. 2d ser. 8 (1851): 1–19]. Wanted to learn about metamorphosis of the class. Agrees with THH’s distinction between individuals and zooids, but thinks zooids will never cease to be called individuals.

Asks to borrow an old pair of GN’s dissecting scissors so that Weiss & Co. can use it as a model.

Health has been poor.

Has finished MS on pedunculated cirripedes for Ray Society [Living Cirripedia, vol. 1 (1851)].

Returns scissors with thanks.

Young John Lubbock who has a strong taste for dissecting insects would benefit greatly from conversation with GN.

Has sent CD some cirripedes and notes which he hopes will be of use. Gives details of occurrence and source of some of the specimens.

Thanks him for letter and Balanus specimen.

Acasta is curious; may be a new genus.

Is sending copy [of Fossil Cirripedia 1]. Correcting proofs [of Living Cirripedia 1].

Mentions comment by Hermann Abich on JDD’s chapters on the Sandwich Islands [in Geology (1849)].

Returns fossil cirripede specimens to JS and Forchhammer.

Sends copies [of Fossil Cirripedia] to them and to Sven Lovén.

Reading proofs [of Living Cirripedia].

G. B. Sowerby’s plates [for Living Cirripedia] are ready for the printer.

Discusses domestic affairs and gives some advice on manners.

Testimonial for THH’s application for Chair in Natural History at Toronto.

Thanks DS for writing about his research on foliation and cleavage. Discusses nature of slate and metamorphic schists.

Makes suggestions for the paper DS is preparing for the Royal Society and raises questions for his consideration; CD hopes he can attend the Society meeting when the paper is read ["On foliation and cleavage of Scotland", Philos. Trans. R. Soc. Lond. 142 (1852): 445–62].

Thanks him for specimens of Xenobalanus. Discusses systematic relations of the genus.

Comments on paper by J. T. Reinhardt ["Om slaegten Lithotryas", Vidensk. Medd. Naturhist. Foren. Kjobenhavn 2 (1850): 1–8].

Thanks for offer of Cirripedia specimens from the Northern Atlantic, but has seen so many that he does not need more.

Flora of New Zealand.

Reconsidering variability of insular species.

Becoming convinced of the probability that the southern flora is a fragmentary one – all that remains of a great southern continent.

Asks for reference to publication about Xenobalanus.

Returns the enclosed parchment.