I tried to rectify that (and note that the article is a little older, so I had to use another copy from not the original source) by using Google image search, but alas, found little. The really nice amphitheater (basically intact, and older than the Flavian amphitheater in Rome, though smaller) was in that town, but served all the towns around the Bay. You could try a search on portus julius, Ischia, Capri, or the various Roman-era town names from the Bay. :')
Thanks. No really detailed pictures.