Note 215 — PRELIMINARY DISCOURSE. (continued 2)

I presume it was the rib itself that was perforated, and not the intercostal space. The term τρύπανον was generally applied to the trepan. The epithet τρυγλητήριον, or, as Foës proposes to read it, τρωλοδυτήριων, is probably derived from τρώγλη, a hole, and δύω, to penetrate; joined together, they would signify a trepan for boring holes.