Summary

Encloses memorandum on Origin [1866]

discussing mimicry in mammals and birds,

abnormal habits shown by birds,

behaviour of cuckoos,

and analogies existing between mammals of the same geographical region.

Speculates on possible lines of development linking groups of mammals.

[CD’s notes on the verso of the letter are for his reply.]

Summary

Opposition to EB within the Asiatic Society.

Possibility of establishment of a zoological garden at Calcutta.

Has seen Gallus varius alive for the first time.

Will procure domestic pigeons for CD; could CD pay for them by returning hardy creatures, such as macaws and marmosets, which EB can sell for a high price in India?

Does not recall his authority for genealogy of the asses of Oman. If a genuine wild ass exists EB believes it will be in south Arabia.

Infertility of Irish and Devon red deer.

Details of an unusual species of wild dog.

Fertility of canine hybrids. General tendency toward hybrid sterility.

Has skins of hybrid Coracias and the parent species.

Wide-ranging species; skua found in Europe and Australia, but not in the tropics.