τοῖς ζῴοις ἐστί, τοῖς μὲν πεζοῖς σχεδὸν ὁμοίως πἀσι, τοῖς δʼ ἄλλοις ἀνομοίως καὶ αὐτοῖς πρὸς αὐτὰ καὶ πρὸς τὰ πεζὰ τῶν ζῷόων.
De partibus animalium. Aristotle. ed. Bernhard Langkavel. United States. 2016.
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