The Lias is noted for its ammonites, and especially for its great marine reptiles, Ichthyosaurus and plesiosaurus.
Among the most singular of these are several species of Ichthyosaurus and plesiosaurus.
How can we find a way that will enable us to dodge the mastodon and the plesiosaurus?
The one marked C belongs to plesiosaurus dolichodeirus, the species represented in our plate.
The other huge reptile was the plesiosaurus, the meaning of which is “Near to a Reptile.”
Enaliosaurians ('sea-lizards'), a group of gigantic Mesozoic reptiles of which the ichthyosaurus and plesiosaurus were the chief.
Neither he nor Mr. Newman insist that the "great unknown" must be the plesiosaurus itself.
plesiosaurus, an extinct marine animal with a small head and a long neck.
In America, however, remains of the plesiosaurus have been discovered in this part of the stratified series.
The saurian reptiles, Ichthyosaurus and plesiosaurus, are found in excellent preservation along with the Pterodactyl.