HE´RCULIS ARENAE(ἁι τοῦ Ἡρακλέους Θῖνεςa range of sand-hills in the NW. of Cyrenaica, behind Hesperides, containing the source of the river Lathon. (Ptol. 4.4. § § 8, 10.) They form the N. part of the Jebel Barkah, its S. part being the VELPI M.of Ptolemy.
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