Plesiosaurus by Edward Riou

Plesiosaurus

Plesiosaurus by Joseph Smit

Plesiosaurus by Riou

scientificillustration:

Ichthyosaurus and Plesiosaurus

By Benjamin Waterhouse Hawkins (1809 - 1889) Watercolour, 1858

Dinosaur Relatives by Diana Magnuson

Plesiosaurus by Dmitry Bogdanov

by Heinrich Harder