Illustration of atlas, axis, and ribs (from various groups of reptiles) from The Osteology of the Reptiles (1925)
Illustration of Platecarpus pelvis (from below) from The Osteology of the Reptiles (1925)
Illustration of Platecarpus right front paddle from The Osteology of the Reptiles (1925)
Illustration of limbs of aquatic reptiles: Platecarpus and Clidastes (Mosasauria), Ophthalmosaurus and Platypterygius (Ichthyosauria) from The Osteology of the Reptiles (1925)
Skeletal reconstructions of the three most common mosasaur species from Kansas by Williston (1898).
An illustration from The Osteology of the Reptiles