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
Sēmōnĭa: ae, f. semen; cf. Semo,
I a goddess of the Romans that presided over the crops, Macr. S. 1, 16.