Note 18:2 — I
Reading edition
One might perhaps say, in all three. Ἀνθίστηρος τοῦ Πυθοχρηστοῦ κοινόν is the name of a society of worshippers in the island of Thera, I. G. I. iii. 329. This gives a god Anthister, who is clearly identified with Dionysus, and seems to be a projection of a feast Anthisteria = Anthesteria. The inscription is of the second century b. c. and it seems likely that Anthister-Anthisteria, with their clear derivation from ἀνθίζειν, are corruptions of the earlier and difficult forms Ἀνθέστηρ-Ἀνθεστήρια. It is noteworthy that Thera, an island lying rather outside the main channels of civilization, kept up throughout its history a tendency to treat the 'epithet' as a full person. Hikesios and Koures come very early; also Polieus and Stoichaios without the name Zeus; Delphinios, Karneios, Aiglatas, and Aguieus without Apollo.
See Hiller von Gaertringen in the Festschrift für O. Benndorff, p. 228. Also Nilsson, Griechische Feste, 1906, p. 267, n. 5.