Note c — BOOK VI.

Thus the Feet of the Otter are made, the Toes being all conjoined with Membranes, as the Feet of Geese and Ducks are. And in Swimming, it is observable, that when the Foot goes forward in the Water, the Toes are close; but when backward, they are spread out, whereby they more forcibly strike the Water, and drive themselves forward. The same may be observed also in Ducks and Geese, &c.

Of the Castor or Beaver, the French Academists say, The Structure of the Feet was very extraordinary, and sufficiently demonstrated, that Nature hath designed this Animal to live in the Water, as well as upon Land. For although it had four Feet, like Terrestrial Animals, yet the hindmost seemed more proper to swim than walk with, the Five Toes of which they were compos’d, being joined together like those of a Goose by a Membrane, which serves this Animal to swim with. But the fore ones were made otherwise; for there was no Membrane which held those Toes joined together: And this was requisite for the Conveniency of this Animal, which useth them as Hands like a Squirrel, when he eats. Memoirs for a Nat. Hist. of Animals, pag. 84.