Hadrosaur (duck-billed dinosaur) unguals or hoofs (casts).
Souvenir postcard (below, left) from the National Museum of Natural History, National Museums of Canada, Ottawa, Ontario, showing mounted skeletons of the hadrosaurs Hypacrosaurus (center) and Edmontosaurus (wall mount, right), in the museum’s “Life Through the Ages” Hall.
Beautyway postcard reproducing a painting by Eleanor M. Kish of the hadrosaur Maiasaura, done for the Canadian Museum of Nature.
To see hadrosaur skin impressions and teeth (casts), CLICK HERE. And to see skulls (casts) of Edmontosaurus in my collection, CLICK HERE, HERE and HERE.