Origin of Species Variorum

→ number of the 1859 1860

OMIT 1861 1866 1869 1872

→ as 1859 1860

in number; as 1861 1866 1869 1872

→ leg and of the feet; 1859 1860 1861 1866 1869

the leg and foot; 1872

→ differs remarkably; as does 1859 1860

and 1861 1866 1869 1872

→ disposition. 1859 1860

disposition, differ remarkably. 1861 1869 1872

disposition, differ re- markably. 1866

→ place 1859 1860 1861 1866 1869

in this case place 1872

touch:

touch;

the oil-gland is quite aborted. Several other less distinct breeds might

have been

specified.

In the skeletons of the several breeds, the

develop- ment

development

of the bones of the face in length and breadth and curvature differs enormously. The shape, as well as the breadth and length of the ramus of the lower jaw, varies in a highly remarkable manner. The →number of the caudal and sacral vertebræ

vary

vary;

→as does the number of the ribs, together with their relative breadth and the presence of processes. The size and shape of the apertures in the sternum are highly variable; so is the degree of divergence and relative size of the two arms of the furcula. The proportional width of the gape of mouth, the proportional length of the eyelids, of the orifice of the nostrils, of the tongue (not always in strict correlation with the length of beak), the size of the crop and of the upper part of the œsophagus; the development and abortion of the oil-gland; the number of the primary wing and caudal feathers; the relative length of

the wing

wing

and tail to each other and to the body; the relative length of →leg and of the feet; the number of scutellæ on the toes, the development of skin between the toes, are all points of structure which are variable. The period at which the perfect plumage is acquired varies, as does the state of the down with which the nestling birds are clothed when hatched. The shape and size of the eggs vary. The manner of

flight,

flight

→differs remarkably; as does in some breeds the voice and →disposition. Lastly, in certain breeds, the males and females have come to differ

a slight degree from each other.

Altogether at least a score of pigeons might be chosen,

which,

which

if shown to an ornithologist, and he were told that they were wild birds, would

certainly

certainly,

~~I think,~~

I think,

be ranked by him as well-defined species. Moreover, I do not believe that any ornithologist would →place