Mount Saint Peter
Around 1765 the skull of a "Mosasaurus" was discovered here in a limestone quarry, one of the first recognised reptile fossils, which was later acquired by the Teylers Museum in Haarlem. A more famous "Mosasaurus" fossil was found between 1770 and 1774 but was confiscated by the French in 1794 and is now in the Muséum national d'Histoire naturelle in Paris. Later dinosaur remains were discovered here as well, belonging to "Betasuchus" and "Orthomerus", as well as turtles and fossils of smaller creatures of the sea.
Hypsibema missouriensis
Remains of "Hypsibema missouriensis" were first discovered in Bollinger County, Missouri by members of the Chronister family while they were digging a cistern, and were subsequently collected by Stewart, later nicknamed "Dinosaur Dan." In 1942, Stewart, of the Missouri Geological Survey, had been examining clay near Glen Allen when he came upon a boy who led him to the family at work digging. According to Stewart, property owner Lulu Chronister had found several "unusual" bones while digging and had saved them. They had been found about deep in the Chronisters' well, which had an overall depth of , "imbedded in a black plastic clay." Stewart reported his discovery to the Smithsonian Institution, which bought the remains—thirteen vertebrae of a dinosaur's tail—from Chronister for US$50, which was later used to purchase a cow. Two other bones, of unknown type, were also recovered from the site, while one additional vertebrae had been given by Lulu Chronister to a friend. At the Smithsonian, the bones were analyzed but the species from which they originated was incorrectly identified.