(Internal #S1965-33).  RARE, MODERN 6-Gill Bluntnose COWSHARK TOOTH (Hexanchidae Hexanchus griseus), upper tooth, 1/2" long. 

THIS IS A PIECE OF THE FULL DENTITION OF A COWSHARK JAW WE SOAKED OUT FOR THE TEETH BECAUSE THE CARTILAGE WAS BAD

Measurement of tooth is made with flexible ruler from tip, along longest side, to top of longest root.