Aardwolf

Ancient Worlds - BBC Two 

Episode 3 “The Greek Thing”

Ostracon (Greek Ostrakon) Ostraca -plural: Archaeologists use this term to refer to ceramic pot sherds with inscriptions on them, the inscriptions placed after the pot was broken and thus separate from normal decoration.

In Athens the voting public used ostracon as a ballot on which the name of a person voted to be ostracized (exiled from Athens for a period of 10 years) was inscribed. 

Agora Museum, Athens, Greece

Fun facts: Oysters are named after ostraca (or the other way around).  Because of linguistic ambiguity, we don't know if the Alexandrian philosopher Hypatia was stabbed to death with pot sherds or oyster shells.