A note on Adrias:
Strabo 5.1.8:
http://penelope.uchicago.edu/Thayer/E/Roman/Texts/Strabo/5A*.html
'But Opitergium, Concordia, Atria, Vicetia, and other small towns like them are less hemmed in by the marshes, though they are connected with the sea by small waterways. It is said that Atria was once an illustrious city, and that the Adriatic28 Gulf got its name therefrom, with only a slight change in the spelling.29
28 The Greek word for "Adriatic" is merely "Adrias."
29 So Pliny (3.20).
'
cf.
http://en.wikipedia.org/wiki/Adria
Thus 'Adrias' would have connoted above all the northernmost part of the Adriatic.
Torsten