These brief remarks apply to plants alone; but some few analogous facts could be given in regard to terrestrial animals.

In marine productions, similar cases likewise occur; as an example, I may quote a statement by the highest authority, Prof.

Dana, that "it is certainly a wonderful fact that New Zealand should have a closer resemblance in its crustacea to Great Britain, its antipode, than to any other part of the world.

" Sir J.

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