. The aquatic Sauropterygians. Nothosaurus, a Trias- sic form, was partially terrestrial and partially aquatic. Elasmosaurus was a Cretaceous plesiosaur. Placodus was a Triassic mollusk-eater Restorations by John C. Germann

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Keywords: ., bookcentury1900, bookpublishernewyork, booksubjectreptilesfossil