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Variation of Animals and Plants under Domestication, the — Volume 1 by Charles Darwin
page 146 of 624 (23%)
weighing only 1 1/4 pounds; rabbits of this breed make excellent nurses for
other and more delicate kinds. (4/10. 'Journal of Horticulture' May 28,
1861 page 169.)

(FIGURE 5. HALF-LOP RABBIT. (Copied from E.S. Delamer's work.)

Certain characters are remarkably fluctuating, or are very feebly
transmitted by domestic rabbits: thus, one breeder tells me that with the
smaller kinds he has hardly ever raised a whole litter of the same colour:
with the large lop-eared breeds "it is impossible," says a great judge
(4/11. 'Journal of Horticulture' 1861 page 327. With respect to the ears
see Delamer on 'Pigeons and Rabbits' 1854 page 141; also 'Poultry
Chronicle' volume 2 page 499 and ditto for 1854 page 586.), "to breed true
to colour, but by judicious crossing a great deal may be done towards it.
The fancier should know how his does are bred, that is, the colour of their
parents." Nevertheless, certain colours, as we shall presently see, are
transmitted truly. The dewlap is not strictly inherited. Lop-eared rabbits,
with their ears hanging down flat on each side of the face, do not transmit
this character at all truly. Mr. Delamer remarks that, "with fancy rabbits,
when both the parents are perfectly formed, have model ears, and are
handsomely marked, their progeny do not invariably turn out the same." When
one parent, or even both, are oar-laps, that is, have their ears sticking
out at right angles, or when one parent or both are half-lops, that is,
have only one ear dependent, there is nearly as good a chance of the
progeny having both ears full-lop, as if both parents had been thus
characterised. But I am informed, if both parents have upright ears, there
is hardly a chance of a full-lop. In some half-lops the ear that hangs down
is broader and longer than the upright ear (4/12. Delamer 'Pigeons and
Rabbits' page 136. See also 'Journal of Horticulture' 1861 page 375.); so
that we have the unusual case of a want of symmetry on the two sides. This
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