ἑκάστῳ τῶν ζῴων, τὰ δὲ πρὸς τὸ βέλτιον ἢ χεῖρον, οἷον ἐχόντων ὀφθαλμοὺς ἀμφοτέρων τὰ μέν ἐστι σκληρόφθαλμα τὰ δʼ ὑγρόφθαλμα, καὶ τὰ μὲν οὐκ ἔχει βλέφαρα τὰ δʼ ἔχει πρὸς τὸ τὴν ὄψιν ἀκριβεστέραν εἶναι.
De partibus animalium. Aristotle. ed. Bernhard Langkavel. United States. 2016.
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