ἐξ ὀνύχων λέοντα τεκμαίρεσθαι → judge by the claws, judge by a slight but characteristic mark, small traits give the clue to the character of a person, deduce something from a small indication, identify a lion from its claws
μεμόρια: ἡ, τὸ Λατ. Memoria = ἡ μνήμη, οὐέτερεμ μεμόριαμ veterem memoriam, «ὅπερ ἐστί, παλαιὰν μνήμην» Πλουτ. Νουμ. 13.
μεμόρια, ἡ (Α)
η μνήμη.
[ΕΤΥΜΟΛ. < λατ. memoria «μνήμη»].