Old, Real Shark Jaw, Deaccessioned from Prep School Science DepartmentYikes! I'm thinking that this was probably the lower jaw of a shark, the type of shark I'm not sure, but seeing all of those layers of teeth make me feel like surely it a ferocious one! Up close one can see (and feel!) the razor like edges of each tooth, four layers deep. I know that this came from a New England prep school biology department, where it lived for a long time. 9 1 2" l x 5" w x 2 3 4" d and in good condition. There is one patch of a bit