Summary

Indigenous domestic animals of the New World.

Relationship of Newfoundland and Esquimo dogs to the wolf. Dogs like the Esquimo occur in Tibet and Siberia. Indian pariah dogs and jackals occasionally interbreed.

Describes domestic cats of India; reports cases of their interbreeding with wild cats. Wild cats are tamed for hunting.

Races of silkworm in India are crossed [see 1690].

Domesticated plants, fish, and birds of India.

Comments on local races and species of crows; it is impossible to trace a line of demarcation between races and species.

Variation in the ability of hybrids to propagate.

Indian cattle breeds; differences between Bos indicus and Bos taurus.

Is not satisfied that aboriginally wild species of horse and ass exist.

Believes all fancy breeds of pigeon originated in the East. Wild ancestors of pigeons, ducks, geese, and fowls. Interbreeding of wild species of pheasant.

[CD’s notes are an abstract of this letter.]

Summary

Notes on Lyell’s Principles, vol. 2.

EB does not believe in connecting links between genera; there is no tendency to gradation between groups of animals.

Does not believe shortage of food can directly produce any heritable effect on size.

Comments on significance of variations discussed by Lyell. Variation in dentition and coloration.

Behaviour of elephants and monkeys.

When varieties are crossed EB considers that the form of the offspring, whether intermediate or like one or other of the parents, depends upon how nearly related the parents are.

Thinks that in the struggle for existence hybrids, and varieties generally, must be expected to give way to the "beautiful & minute adaptation" of the pure types.

Colours of Indian birds.

Vitality of seeds.

Variation among palms.

Fauna of Malaysia and New Zealand. Ranges of bird species.

[Memorandum originally enclosed with 1760.]

Summary

Discusses apes and their relationships to each other. Writes particularly of the gibbon, its structure and well-developed legs giving it the ability to walk without using its hands.

Summary

Believes the goldfish originates from a wild, gold variety of Chinese carp.

Gallinaceous birds.

Crested turkeys.

EB divides the gallinaceous birds into five families on anatomical distinctions.

Wild dog species of India and Asia; ranges of some species, specific identity of others.

The fauna of the Seychelles.

Breeding of fowls in India and Africa.

Occurrence of turkeys in Africa.

Refers to some of his own papers giving fuller details of points raised previously.

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.

Summary

Gives extract from a letter from Capt. R. Tickell: rabbits are not bred by the Burmese; common European and Chinese geese are bred but have probably only recently been introduced.

EB gives references to works illustrating the dog-like instinct of N. American wolves.

Discusses reason and instinct; ascribes both to man and animals. Comments on various instincts, e. g. homing, migratory, parental, constructive, and defensive. Reasoning in animals; cattle learning to overcome fear of passing trains.

Hybrid sterility as an indication of distinct species. Interbreeding as an indication of common parentage.

Enlarges upon details given by J. C. Prichard [in The natural history of man (1843)].

Adaptation of the two-humped camel to cold climates. Camel hybrids.

Doubts that domestic fowl or fancy pigeons have ever reverted to the wild.

Feral horses and cattle of S. America.

Believes the "creole pullets" to be a case of inaccurate description.

Variations in skulls between species of wild boar.

Pigs are so prolific that the species might be expected to cross.

Milk production of cows and goats.

Sheep and goats of lower Bengal.

Indian breeds of horses.

Variation in Asiatic elephants.

Spread of American tropical and subtropical plants in the East.

EB distinguishes between races and artificially-produced breeds.

[CD’s notes are an abstract of this memorandum.]

Summary

Origin of domestic varieties. EB ascribes "abnormal" variations to man’s propagation of casual monstrosities; believes "normal" variations, e.g. European races of cattle, are a consequence of man’s selecting the choicest specimens. Gives examples of "abnormal" variations; they give rise to features that have no counterpart among possible wild progenitors. Divides domestic animals into those whose origin is known and those whose origin is unknown. Considers that the wild progenitors of nearly all domestic birds are known. Fowls and pigeons show many varieties but if propagated abnormalities are ignored each group can be seen to be variations of a single species, the ancestors of which can be recognised without difficulty. Discusses varieties and ancestry of the domestic fowl. Variation in the wild; the ruff shows exceptional variability; other species of birds show variability in size of individuals. Remarks that markings sometimes vary on different sides of the same animal. Comments on the want of regularity in leaf and petal patterns of some plants. Discusses domestic varieties of reindeer and camels. Origin of humped cattle. Reports the rapid spread of a snail in lower Bengal that was introduced as a single pair five or six years previously.

[CD’s notes are an abstract of part of this memorandum. Memorandum originally enclosed with 1760.]

Summary

Encloses "notes for Mr. D" [see 1818] and a memorandum on the wild cattle of southern India [see 1819].

Breeds of silky fowl of China and Malaya. Black-skinned fowl.

Doubts any breed of canary has siskin blood; all remain true to their type.

Wild canary and finch hybrids.

Hybrids between one- and two-humped camels.

Does not regard zebra markings on asses as an indication of interbreeding but as one of the many instances of markings in the young which more or less disappear in the adult.

Crossing of Coracias species at the edges of their ranges.

Regional variations and intergrading between species of pigeons.

Regards the differences in Treron as specific [see Natural selection, p. 115 n. 1].

Gives other instances of representative species or races differing only in certain details of colouring.