Summary

On F. M. Balfour.

Effects of ammonium carbonate on roots.

FM’s Pontederia case is very curious.

Summary

Has read and admires FM’s work on species.

Observations on Crustacea are good and original; asks FM to dissect and check some of CD’s observations on cirripedes.

Has sent "Climbing plants" paper [J. Proc. Linn. Soc. Lond. 9 (1865): 1–118] and would like to send Orchids.

Summary

Thanks for interesting letter on climbing plants.

FM’s view on Anelasma seems probable.

Difficulty quoted by FM from A. Agassiz on embryology of Echinodermata is quite beyond CD.

Summary

Is sending FM’s two letters on climbing plants as a paper to the Linnean Society ["Notes on some of the climbing plants near Desterro, in south Brazil", J. Proc. Linn. Soc. Lond. (Bot.) 9 (1867): 344–9].

Adaptations for pollination in Catasetum.

Summary

Has forwarded FM’s MS to Max Schultze, but did not read it.

Movement of stem apex in Linum.

Haeckel’s paper on reproduction in certain Medusae.

Summary

Has read FM’s paper on sponges ["Über Darwinella aurea", Arch. Miskrosk. Anat. 1 (1865): 344–53] with interest.

Has also read FM’s work on the metamorphoses of Peneus [Ann. & Mag. Nat. Hist. 3d ser. 14 (1864): 104–15], an interesting and important embryological discovery.

CD regards Louis Agassiz’s opinions as valueless.

Summary

Structure of Scaevola and its fertilisation with insect aid.

Fertilisation of Aristolochia.

FM’s paper on climbing plants [see 5146].

Is preparing new edition of Origin.

Summary

Thanks for information on orchids

and facts on coastal flora and fauna.

Asks FM to look out for dimorphic aquatic and marsh plants.

Has read pamphlets "in our favour" by Carl v. Nägeli and Oscar Schmidt.

Summary

Thanks for observations on orchids.

FM’s paper on climbing plants [see 5146]; CD has received proofs.

Carl Claus’s pamphlet on copepods [Die Copepodenfauna von Nizza (1866)].

Summary

Fertilisation in orchids: Friedrich Hildebrand’s paper.

Self-sterility.

Climbing plants.

Agassiz’s attempts to eliminate all Darwinian views.

Summary

Hildebrand’s paper on trimorphism in Oxalis ["Über den Trimorphismus in der Gattung Oxalis", Monatsber. K. Preuss. Akad. Wiss. Berlin (1866): 352–74].

Problems of explaining brightly coloured, attractive seeds.

Haeckel has visited Down.

FM’s climbing plants paper is printed [J. Proc. Linn. Soc. Lond. (Bot.) 9 (1867): 344–9].

Summary

Thanks for observations on dimorphic plants. Dimorphism prevalent in certain groups throughout the world.

Retarded fertilisation in certain orchids.

Summary

CD’s Variation is in printer’s hands.

Orchid self-sterility.

Summary

Observations on orchid self-sterility.

Wants information on characters that may have originated through sexual selection in lower animals.

Encloses queries on expression.

Summary

Thanks for facts on orchids.

Friedrich Hildebrand’s new book on fertilisation of plants [Die Geschlechten-Vertheilung bei den Pflanzen (1867)].

CD correcting proofs of Variation.

FM likes Ernst Haeckel’s book [Generelle Morphologie (1866)].

Summary

Self-sterility in orchids.

Growth differences in plants raised from self- and cross-fertilised seed.

Summary

Thanks for information on sexual differences.

Orchids; self-sterility and difficulty of getting seeds to germinate.

Dimorphism.

Summary

Has abstracted for insertion in his sterility chapter [Variation 2, ch. 18], FM’s observations of plant’s pollen being poisonous to itself.

Occurrence of mimetic plants.

Colouring of Planariae.

Summary

Queries about expressions in crying monkeys.

Has received letter from Hermann Müller on orchid fertilisation.

Summary

Variation to be published at end of month.

Dimorphism and self-sterility.

Seed dissemination in Adenanthera.