η, ον, thirteenth, PCair. Zen. 1.10 (iii BC), IG 11(2).161 B 10 (Delos, iii BC), GDI 2642.61 (Delph., ii BC), UPZ 10.5 (ii BC), etc. ; τρισκ- occurs mostly later, IG 11(2).283.9 (Delos, iii BC), Mon.Anc.Gr. 12.12, POxy. 73.1, al. (i AD), and should be corrected in Il. 10.561, Od. 8.391, Hes. Op. 780, etc. ; cf. A.D. Synt. 200.13; Aeol. [τρις] καιδέκοτος IG 12(2).82.1 (Mytil.).