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
Schirm, I) eig. = Sonnenschirm: umbella. – II) uneig., Schützer etc.: scutum (Schild, z.B. imperii, Flor. 2.6, 27). – praesidium (Schutz).