χελῶναι μακάριαι τοῦ δέρματος → you tortoises are fortunate in your skin, you blessed turtles with your shell
-ου, ὁ Argestes persa, A.Pers.308.
Ἀργ- is perhaps connected with YAv. arəja, worthy, fr. arəj, Skt. arh; -ηστης suggests Av. asti, companion.