38a. Anchisaurus, Triassic Dinosaur, 1893
Marsh is usually associated with the Jurassic dinosaur beds of Wyoming, but he taught at Yale University in New Haven, in the Connecticut River Valley, just south of where Hitchcock had discovered bird-like tracks in Triassic rocks a half-century earlier. Between 1889 and 1893 Marsh announced the discovery of five carnivorous dinosaurs in the Connecticut sandstone, of which the best represented was Anchisaurus. In his restoration, Marsh portrayed the dinosaur as bipedal, but he pointed out that the large fore limbs allowed for the possibility that it moved on all four feet. Marsh concluded by re-iterating that it was now evident that the supposed “bird tracks” of the Connecticut valley were made by dinosaurs like Anchisaurus.
Source
Marsh, Othniel C. "Restoration of Anchisaurus," in: American Journal of Science, vol. 45, (1893), pp. 169-170. This work is part of our History of Science Collection, but it was NOT included in the original exhibition.