Origin of Species Variorum

→ domestic dog throughout the 1872

whole 1859 1860 1861 1866 1869

→ for who will 1861 1866 1869 1872

Who can 1859 1860

→ Many cases are on record, showing 1861 1872

There can be no doubt 1859 1860

→ OMIT 1872

could be obtained nearly 1859 1860 1861

→ quite distinct races, would be very difficult. 1872

extremely different races or speceies, I can hardly believe. 1859

extremely different races or species, I can hardly believe. 1860 1861

↑ 1 blocks not present in 1859 1860 1861 1872; present in 1866 1869

Many cases are on record, showing that a race may be modified by occasional crosses, if aided by the careful selection of the individuals which present the desired character; but to obtain a race nearly intermediate between two extremely different races or species, would be very difficult.

→ in character, and 1872

and 1859 1860 1861 1866 1869

→ OMIT 1869 1872

or rather utter hopelessness, 1859 1860 1861

or rather utter hopelessness 1866

→ Pigeon , their Differences and Origin . 1872

Pigeon .— 1859 1860 1861

Pigeon, their Differences and Origin . 1866 1869

in India. Even in the case of the

domestic dogs

breeds

of the →domestic dog throughout the world, which I

fully

....

admit

have probably

to have

are

descended from several wild species,

cannot

doubt

be doubted

that there has been an immense amount of inherited

variation.

variation;

→for who will believe that animals closely resembling the Italian greyhound, the bloodhound, the bull-dog,

pug-dog, or

Blenheim spaniel, &c. — so unlike all wild Canidæ — ever existed

freely

....

in a state of nature? It has often been loosely said that all our races of dogs have been produced by the crossing of a few aboriginal species; but by crossing we can

get only

only get

forms in some degree intermediate between their parents; and if we account for our several domestic races by this process, we must admit the former existence of the most extreme forms, as the Italian greyhound, bloodhound, bull-dog, &c., in the wild state. Moreover, the possibility of making distinct races by crossing has been greatly exaggerated. →Many cases are on record, showing that a race may be modified by occasional crosses, if aided by the careful selection of

those

the

individual

individuals

mongrels,

mongrels

....

which present

any

the

desired character; but

that

to obtain

a race →OMIT intermediate between two →quite distinct races, would be very difficult. ↑ Sir J. Sebright expressly

experimentised

experimented

for

with

this object, and failed. The offspring from the first cross between two pure breeds is tolerably and sometimes (as I have found with pigeons)

extremely

quite

uniform,

uniform

→in character, and everything seems simple enough; but when these mongrels are crossed one with another for several generations, hardly two of them

will be

are

alike;

alike,

and then the

extreme

....

difficulty,

difficulty

→OMIT of the task becomes

apparent.

manifest.

On the

....

Breeds of the Domestic → Pigeon , their Differences and Origin .

Believing that it is always best to study some special group, I have, after deliberation, taken up domestic pigeons. I have kept every breed which I could purchase or obtain, and have been most kindly favoured with skins from several quarters of the world, more especially by the Hon. W. Elliot from India, and by the Hon. C. Murray from Persia. Many treatises in different languages have been published on pigeons, and some of them are very important, as being of

con- siderable

considerable

antiquity. I have associated with several eminent fanciers, and have been permitted to join two of the London Pigeon Clubs. The diversity of the breeds is something astonishing. Compare the English carrier and the short-faced tumbler, and see the wonderful

dif- ference

difference

in their beaks, entailing corresponding differences in their skulls. The carrier, more especially the male bird, is also remarkable from the wonderful development of the carunculated skin about the

head,

head;

and this is accompanied by greatly elongated eyelids, very large external orifices to the nostrils,