Thanks CD for his paper on climbing plants. Lists the many genera that he has found in his area in a short period since reading CD’s paper. [See 4881.]

FM’s comments on Climbing Plants.

Hopes CD has received his letter of 12 August.

Sends some new observations on climbing plants. [The observations are part of "Notes on some of the climbing-plants, near Desterro, in South Brazil", J. Linn. Soc. (Bot.) 9 (1867): 344–9.]

Thanks CD for his photograph.

Sends a paper ["Über das Holz einiger um Desterro wachsender Kletterpflanzen", Botanische Zeitung 24 (1866): 57–60, 65–9].

Believes species of sponge with different mineral spiculae are descended from a form with organic spiculae.

Reports observations on motions of Linum stalks following the sun.

Regards Anelasma as a connecting form between cirripedes and Rhizocephala.

Thanks CD for the copy of Orchids and papers on Linum and Lythrum [Collected papers 2: 93–105; 106–31].

Intends to travel to the River Itajahy and will make observations on climbing plants. Is not sure whether Dalbergia is a winding plant.

CD has changed FM’s whole perception of nature.

CD has helped him to understand distribution of coastal flora.

The vegetation on Desterro is changing.

Louis Agassiz is seeking evidence against transmutation in the distribution of the fish in the Amazon.