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The obvious Characters giving an artificial Method; and the Conſideration of their Origin a natural one.
Nor is it more difficult, with due Care and Attention, to follow the ſeveral other Foſſils thro' their gradual Approaches to Perfection, in their various Kinds; and by marking the Degrees and Steps of this Aſcent, to lay down a ſure Foundation of the moſt deſirable of all Attainments in this Study, a natural Method: Dividing them into Genera, Species, Varieties; and a yet ſubordinate. Diſtinction to all, Varieties of Varieties. For Inſtance;
Genus.
