The Variation of Animals and Plants Under Domestication I by Charles Darwin

Author:Charles Darwin [Darwin, Charles]
Language: eng
Format: epub
Published: 2016-08-23T00:00:00+00:00

Fig. 33.—Occipital Foramen, of natural size. A. Wild Gallus bankiva. B. Cochin Cock.

Of Dorkings I have examined three skulls, one belonging to the white sub-breed; the one character deserving notice is the breadth of the frontal bones, which are moderately furrowed in the middle; thus in a skull which was less than once and a half the length of that of G. bankiva, the breadth between the orbits was exactly double. Of Hamburghs I have examined four skulls (male and female) of the pencilled sub-breed, and one (male) of the spangled sub-breed; the nasal bones stand remarkably wide apart, but in a variable degree; consequently narrow membrane-covered spaces fare left between the tips of the two ascending branches of the premaxillary bones, which are rather short, and between these branches and the nasal bones. The surface of the frontal bone, on which the branches of the premaxillary rest, is very little depressed. These peculiarities no doubt stand in close relation with the broad flattened rose-comb characteristic of the Hamburgh breed.

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