Note i — BOOK IV.

To the foregoing, I shall briefly add some Examples of the special Provision made for the Motion of some Animals by Temporary Parts. Frogs and Toads, in their Tadpole-state, have Tails, which fall off when their Legs are grown out. The Lacerta aquatica, or Water-Newt, when Young, hath four neat ramified Fins, two on a Side, growing out a little above its Fore-Legs, to poise and keep its Body upright, (which gives it the Resemblance of a young Fish,) which fall off when the Legs are grown. And the Nymphæ and Aureliæ, of all or most of the Insects bred in the Waters, as they have particular Forms, different from the Insects they produce; so have also peculiar Parts afforded them for their Motion in the Waters: Oars, Tails, and every Part adapted to the Waters, which are utterly varied in the Insects themselves, in their mature State in the Air.