#osteopygis

'Tanninim of the Fifth Day - restorations of Mesozoic reptiles' from Nature and the Bible by John William Dawson (1875), after Benjamin Waterhouse Hawkins, Cope (1869) and Dawson (1873)

"Life in the Mesozoic Period: Aquatic Reptiles and Cephalopods. Reptiles.—Plesiosaur and Osteopygis, Ichthyosaur, Teliosaur [sic], Plesiosaur, Elasmosaur, Mosasaur (in order of the heads from left to right).—Cephalopods.—Ammonite, Crioceras, Belemnites, Baculites, and Ammonites (in order from left to right). The Reptiles after Hawkins and Cope’s Restorations."

From The Story of the Earth and Man by J. W. Dawson, 1873

https://www.gutenberg.org/files/42741/42741-h/42741-h.htm

After Benjamin Waterhouse Hawkins and Cope (1869)

"Laelaps aquilunguis [Dryptosaurus] occupies the foreground on a promontory, where his progress is interrupted by the earliest protest of an Elasmosaurus. Mosasaurus watches at a distance with much curiosity and little good will, while Osteopygis views at a safe distance the unwonted spectacle. On the distant shore a pair of the huge Hadrosauri browse on the vegetation, squatting on their haunches and limbs as on a tripod. Thoracosaurus crawls up the banks with a fish, and is ready to disappear in the thicket."

From 'The Fossil Reptiles of New Jersey (Continued)' by Edward Drinker Cope, The American Naturalist, Vol. 3, No. 2 (April 1869), pp. 84-91