Note 156 — Chapter XL · BATTLES OF THERMOPYLÆ AND ARTEMISIUM.
Reading edition
Diodorus (xi, 12), Plutarch (Themistoklês, 8), and Mannert (Geogr. der Gr. und Römer, vol. vii, p. 596), seem to treat Sêpias as a cape, the southeastern corner of Magnesia: this is different from Herodotus, who mentions it as a line of some extent (ἅπασα ἡ ἀκτὴ ἡ Σηπιὰς, vii, 191), and notices separately τὴν ἄκρην τῆς Μαγνησίης, vii, 193.
The geography of Apollonius Rhodius (i, 560-580) seems sadly inaccurate.