Classification of Hawkins 1834
G. †Plesiosaurus de la Beche and Conybeare 1821
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†Plesiosaurus exarsostinus Hawkins 1834
†Plesiosaurus pentetarsostinus Hawkins 1834
†Plesiosaurus tessarestarsostinus Hawkins 1834
G. †Ichthyosaurus Koenig 1818
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†Ichthyosaurus chiroligostinus Hawkins 1834
†Ichthyosaurus chiroparamekostinus Hawkins 1834
†Ichthyosaurus chiropolyostinus Hawkins 1834
†Ichthyosaurus chirostrongulostinus Hawkins 1834