Lucania. Paestum/Poseidonia, ca. 218-201 BC. AE Quadrans 17mm, 3.59g. 

Head of Poseidon right; three dots behind. 
PAIS, Dolphin right; three dots above. 

Crawford, "The Form and Function of a Subsidiary Coinage" 5/2; HN Italy 1206. 

With permission of London Ancient Coins, Sept 2011.