14. Webbed feet are those in which the toes are not separated, but seem
to be joined together by a thin substance, like thick skin, which
enables them to swim more easily.
15. Don was a very large dog, of the Newfoundland species, a kind which
is remarkable for its beauty and intelligence.
LESSON XXII.
_Frogs and Toads._--BIGLAND.
1. Frogs and toads resemble one another in figure, but custom and
prejudice have taught us to make a very different estimate of their
properties: the first is considered as perfectly harmless, while the
latter is supposed to be poisonous.
2. In this respect, the toad has been treated with great injustice: it
is a torpid, harmless animal, that passes the greatest part of the
winter in sleep.
3. Astonishing stories have been told of toads found in the center of
solid blocks of stone, and other similar situations, without the least
trace of the way by which they entered, and without any possibility of
their finding any kind of nutriment.
4. Toads, as well as frogs, are of a variety of species; and in the
tropical climates they grow to an enormous size.
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