Note 178 — BOOK II.
Charles Duke Yonge translation
The true interpretation of this passage is as follows: Here in Macedon, says Aratus, the head of the Dragon does not entirely immerge itself in the ocean, but only touches the superficies of it. By ortus and obitus I doubt not but Cicero meant, agreeable to Aratus, those parts which arise to view, and those which are removed from sight.