Abstract

A QUESTION of some interest is raised by a letter published by Mr. Saville Kent, in NATURE, vol. viii. p. 25. It is stated that a Plaice, now in the Brighton Aquarium, has “the posterior half of its under surface, usually white, coloured and spotted as brilliantly as the upper one; the line of demarcation between these two colours again, though sinuous, is most abrupt,” and the writer proceeds to say that, on the Darwinian theory, this may be considered as a remarkable instance of reversion—“the Pleuronectiæ being derived from ancestors originally possessing bilateral symmetry, and an equal degree of coloration on each side.”

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