Summary

Pleased by CD’s letter; his object was to apply CD’s principles to the reform of zoology. When this is done, it is wonderful to see how improved one’s understanding of the Crustacea (Arthropoda) becomes. Cites examples.

Summary

Thanks AD for his paper on "Morphology of the Arthropoda" [Rep. BAAS 37 (1867) pt 2: 82], a deeply interesting subject.

Suggests he examine specimens of Scalpellum.

Fritz Müller thinks CD is mistaken, but CD cannot persuade himself he was wrong in his observations on Balanidae [Living Cirripedia 2: 105].

Summary

He has gone through the whole embryology of the Crustacea and has arrived at a pretty well-established genealogy of the whole class; has even tried to write a history of the whole tribe. Finds he cannot adopt the old separation of Orders in the Class; the limits between them are indistinct.

Would like to study embryology of Limulus. Asks CD’s help in obtaining a female specimen.

Outlines his proposal to establish a marine zoological station.

Summary

Delighted to hear of success of EH’s lectures.

Ernest Faivre [La variabilité des espèces (1868)] sees no reason to favour common descent of allied species.

Asks EH to pass German edition of Variation on to Gegenbaur.

Comments on work of Miklucho[-Maclay], Dohrn, and Bleek.

Has begun work on Descent.

Summary

Describes his lectures on CD’s theory.

Thanks CD for copy of Variation. Comments on book.

Describes work of two protégés in Jena: Nicolas von Miklucho[-Maclay] and Anton Dohrn.

His cousin, Wilhelm Bleek, is sending an article about the origin of language.

Asks to keep book a few months longer but will return it if CD needs it [Webb and Berthelot, Histoire naturelle des Îles Canaries, vol. 3, pt 1: Géographie botanique (1840)].

Describes research on Siphonophora.

Describes life in Jena. Mentions alpine accident during wedding trip.

Summary

Thanks CC for two memoirs [see 6575. The other was possibly "Die Cypris-ähnliche Larve der Cirripedien", Schr. Ges. Beförd Naturw. Marburg (1869)].

Haeckel is too enthusiastic and too bold in drawing conclusions.

CD sees no reason to add to what he says on isolation, in new edition of Origin.

Lists specimens he has available for CC’s intended study of metamorphoses of Lepas.

Summary

A curious error – too late to change: in Cross and self-fertilisation CD has "cleistogenous" for "cleistogamous" flowers throughout.

Summary

His gratitude for CD’s gift. An account of his difficulties with the Zoological Station and his health.

F. M. Balfour has told him that CD would like to see the question of complemental males in cirripedes studied again. AD would like to enter the field and to study the whole morphological development of cirripedes.

Describes the interest in embryological work in Russia and Germany.