Kantharos?

Single fragment of shoulder.

Nearly straight lower wall, curving in above scraped groove. Above scraped groove, antithetical leaping dolphins above spiral waves based on three lines with white dots between them. Below scraped groove, painted vertical ribs, topped by two horizontal lines with white dots between them. Graffito Φι'λιππος Η[ on upper wall (owner's mark).

Shiny black glaze inside and outside, shiny brown on lower exterior.

For ribbing cf. 1172. Dolphins similar to those of the Shark Group (e.g. 202, 203).