μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea
Cănis: is, m.,I a small river tributary to the Po, Plin. 3, 16, 20, § 117.
(2) Cănis,¹² is, m., fleuve d’Arabie : Plin. 6, 148.