Skull (cast) of a mosasaur, a Mesozoic marine reptile related to today’s monitor lizards.
Souvenir postcard from the Museum of Geology, South Dakota School of Mines and Technology, Rapid City, showing the museum’s mounted skeleton of the mosasaur Mosasaurus conodon.
American Museum of Natural History souvenir postcard reproducing a painting of the giant mosasaur Tylosaurus painted for that instiution in 1899 by Charles R. Knight.
