Dorothea Bate discovered the dwarf elephant and the myotragus, an extinct goat-like antelope.
A 10-year-old boy was out looking for fossils along the shore in Islandmagee when he spotted the back of the skull.
Archaeologists say the ichthyosaur vertebra was deliberately collected and kept during Roman times.
Matthew Myerscough swapped mountains for fossil-laden beaches after becoming trapped in snow on Yr Wyddfa.
It is believed the creature had lain undiscovered for more than 320,000,000 years.
The new installations, which open on Monday, include the first ever named dinosaur, the Megalosaurus.
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The sale price of the 67 million-year-old fossil exceeded the previous record set by a stegosaurus in 2024.
The dinosaur skeleton, which roamed the planet 67 million years ago, was sold by Sotheby's in New York.
