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This marked difference of habit between congeneric species so closely allied as the two Bustards is very curious.

What it is we already have seen: a material reality, and as such divisible into parts, placed in the world in the midst of a congeneric multitude.

We have evidence that these ancient animals possessed the same senses as their congeneric races now on the globe.

The point to be made here is simply this: If the species in question are to be considered congeneric then it might reasonably be expected that they would display some similarity in nidification and egg-laying.

He had allowed some years to pass since Davy's brilliant discovery of potassium and its congeneric metals, without a word about them in his lectures.