Murphy’s killing shot took Svangar in the hollow of his throat, leaving his jaws intact with their “dinner plate sized teeth”. Given Lacuna’s predilections and presence at his death, she is bound to collect them and repurpose them, but into what?
I think Harry is going to receive an Ivory scrimshaw dinner service from Lacuna as a wedding present, given Jim’s description. It is the most suitably creepy gift from Lacuna he could receive.