It included all Picariae which had not " zygodactylous " feet, that is to say, toes placed in pairs, two before and two behind.
Order Cuculiformes.-Desmognathous, nidicolous; zygodactylous, or with the outer toe reversible.
467 Leptosomus discolor, which, on account of its zygodactylous feet, some authorities place among the Cuculidae, while others have considered it the type of a distinct family Leptosomatidae.
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