Theories and facts as to palaeogenesis in its probable influence on the coloration of animals / by Jonathan Hutchinson.

  • Hutchinson, Jonathan, Sir, 1828-1913.
Date:
1912
Catalogue details

Licence: In copyright

Credit: Theories and facts as to palaeogenesis in its probable influence on the coloration of animals / by Jonathan Hutchinson. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    in this region to defects in the vertebrae, the so-called spina bifida occulta; but the “ Porcupine-patch ” is sometimes present in well-formed spinal columns. It is, I believe, in the human subject, sexual as well as palaeogenetic. I have never seen it in women. Amongst the Zebras the dorsal black streak is often not well marked, and in contrast with the Asses, they have almost always dark-coloured noses. It would appear that the dorsal streak is sometimes white instead of black. To show the colour pattern in the Quagga, equatorial arrangement. (Copied by permission from the Zoological Society’s Garden 1 Catalogue.’) The bars on the legs, often narrow, circular and strongly marked, are present almost to the hoofs, and on the face almost to the mouth, and are sometimes evident almost to the tip of the tail. There are usually some strong bands near to the shoulder, but no tendency to the formation of a single bar like that of the Ass’s shoulder streak. A remarkable tendency to equatorial limitation is sometimes observed, especially in the Quagga. In the latter, the hind quarters are often free from bars, and the lower parts of all the limbs almost always so. The bars in the Zebras vary very much in their width and multiplicity. When broad, they are much divided and narrow.