ὀστρακόδερμος
From LSJ
Κακῷ σὺν ἀνδρὶ μηδ' ὅλως ὁδοιπόρει → Hominem malignum nec viae comitem cape → Nimm einen Schurken nie zum Wegbegleiter dir
English (LSJ)
ον,
A with a shell like a potsherd, hard-shelled, καρκίνοι Batr.295; ὀ. ζῷα testaceans or molluscs (excl. cuttle-fishes), opp. μαλακόστρακα, Arist.HA523b9, cf. 590a19, Thphr.HP4.6.8, Ath.3.89f, Jul.Or.6.193b; also of certain crabs, Arist.HA601a18; of eggs, ib.489b14.