. The life-history of British serpents and their local distribution in the British isles. Serpents. THE ADDEK. 123 brightest coluured of iiU adders is a young male seen just after easting liis slougli. So in tlie female the dull colour is seen more distinctly after sloughing. The slough obseures the true colour ; it does not aid or influence its }iroducti(jn. 7. ratliolot/iro/ cat'sc-^.—The possibility of some very exceptional colouring being due to pathological or unnatural causes must not be overlooked. Disease. Fii:. 30.—Old Adder ('JGJ, inches long). might affect it, or the same k
. The life-history of British serpents and their local distribution in the British isles. Serpents. THE ADDEK. 123 brightest coluured of iiU adders is a young male seen just after easting liis slougli. So in tlie female the dull colour is seen more distinctly after sloughing. The slough obseures the true colour ; it does not aid or influence its }iroducti(jn. 7. ratliolot/iro/ cat'sc-^.—The possibility of some very exceptional colouring being due to pathological or unnatural causes must not be overlooked. Disease. Fii:. 30.—Old Adder ('JGJ, inches long). might affect it, or the same kind of cause might be operating which now and then one sees the result of in a white pheasant.' My own idea is that the white adders are examples of this pathological colour variation. In these cases the true condition is a non- production of colour rather than a variation. White adders occur so rarely that I cannot avoid coming to the conclusion that they are merely abnormalities.^ ^ Some specimens are IJeaclieil fiom long )>i'eservatioii, not having beeu kept in the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Leighton, Gerald Rowley, 1868-. Edinburgh, London, W. Blackwood
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectserpent, bookyear1901
