Fossil Rib Bone from a Duckbilled Dinosaur, Hadrosaurus foulkii or Plesiosaurs

Duckbilled Dinosaur, Hadrosaurus foulkii , which roamed the forest and swamps along the bays of New Jersey's ancient seacoast. Type of Plesiosaurs (Cimoliasaurus magnus) which lived in what is now New Jersey. This item was found in a stream in Monmouth County NJ while I was searching for fossil shark teeth around 1985 - 1987.

I had this in my office on display since then. This specimen was shown, shortly after I found it, to a representative from The Franklin Institute of Philadelphia who was giving a lecturing on geology and paleontology at The Princeton Day School in NJ. After the lecture I showed him this specimen. He identified it as a fossil dinosaur rib bone from either a.

Duckbilled Dinosaur, Hadrosaurus foulkii or. Type of Plesiosaurs both which inhabited NJ.