The mound known as Zerélia stands on a hill between two small lakes to the south-west of Almyró in Phthiotis (Fig. 1). Recent writers on the topography of the district have conjectured that this was the site of Itonos and the famous temple of Athena Itonia. We first visited the site in July 1907, and believed, that apart from the question of the site of the temple, it would repay excavation, since we recognised that the mound (Fig. 2) was probably formed by the accumulation of débris from prehistoric settlements. Thanks to a grant from the Cambridge University Worts Fund, and to subscriptions from several friends we were enabled to excavate here in June 1908.